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Obama K, Fujimori M, Boku N, Matsuoka A, Mori K, Okizaki A, Miyaji T, Kadowaki M, Okamura M, Majima Y, Shimazu T, Uchitomi Y. Shared Decision-Making Support Program for Elderly Patients with Advanced Cancer Using Question Prompts and Geriatric Assessments: Phase II Randomized Controlled Trial. J Geriatr Oncol 2022. [DOI: 10.1016/s1879-4068(22)00301-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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2
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Okamura M, Konishi M, Saigusa Y, Ando S, Nakayama M, Komura N, Sugano T, Tamaura K, Nakamura T. Impact of grip strength and balance function on the exercise capacity in pulmonary hypertension. Eur J Prev Cardiol 2021. [DOI: 10.1093/eurjpc/zwab061.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
【Background】
Patients with pulmonary hypertension (PH) suffer from poor exercise capacity due to impaired oxygenation or reduced cardiac output. However, the relationship between exercise capacity and physical functions remains unclear.
【Purpose】
The purpose of this study is to investigate the relationship between exercise capacity and physical functions in pulmonary hypertension.
【Methods】
From February 2018 to June 2020, 94 patients (61.3 ± 14.7 years old, 69.1% females) with group 1/3/4/5 PH underwent cardiac catheterization, 6-minute walking distance (6MWD), and physical function measurements simultaneously. The physical functions was measured using muscle strength (grip strength, knee extension muscle strength), balance function (one leg standing time), and short physical performance battery (SPPB). Exercise capacity was measured by 6MWD.
【Results】
The study cohort consists of 22/8/60/4 (23.4%/8.5%/63.8%/4.3%) patients with group 1/3/4/5 PH, respectively. The average age of each group was 50.7/64.7/63.1/66.0 years old, respectively. A total of 194 measurements of physical functions were evaluated from 94 patients and employed in multivariate logistic regression analysis using adaptive-LASSO methods with the 6MWD (476.2 ± 107.5m) as a dependent variable. WHO functional class (class II: standardized β=-0.35, 95% confidence interval (CI) [-0.54 - -0.16], p < 0.001), class III: β=-0.60, 95%CI [-0.90 - -0.30], p < 0.001), mixed venous oxygen saturation (SvO2: β=0.11, 95%CI [0.03 - 0.19], p = 0.008), pulmonary vascular resistance (PVR: β=-0.16, 95%CI [-0.25 - -0.07], p < 0.001), grip strength (β=0.20, 95%CI [0.09 - 0.31], p < 0.001), one leg standing time (β=0.10, 95%CI [0.00 - 0.20], p = 0.049) , and 4m gait speed test (β=-0.28, 95%CI [-0.36 - -0.19], p < 0.001) were associated with 6MWD.
【Conclusions】
Grip strength and balance function, as well as SvO2 and PVR, were associated with the exercise capacity in pulmonary hypertension.
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Affiliation(s)
- M Okamura
- Yokohama City University Hospital, Department of Rehabilitation, Yokohama, Japan
| | - M Konishi
- Yokohama City University School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
| | - Y Saigusa
- Yokohama City University School of Medicine, Department of Biostatistics, Yokohama, Japan
| | - S Ando
- Tokyo University of Science Faculty of Engineering, Department of Information and Computer Technology, Tokyo, Japan
| | - M Nakayama
- Yokohama City University School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
| | - N Komura
- Yokohama City University School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
| | - T Sugano
- Yokohama City University School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
| | - K Tamaura
- Yokohama City University School of Medicine, Department of Medical Science and Cardiorenal Medicine, Yokohama, Japan
| | - T Nakamura
- Yokohama City University School of Medicine, Department of Rehabilitation Medicine, Yokohama, Japan
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Yamanaka M, Iwata H, Masuda K, Araki M, Okuno Y, Okamura M, Koiwa J, Tanaka T. A novel orexin antagonist from a natural plant was discovered using zebrafish behavioural analysis. Eur Rev Med Pharmacol Sci 2021; 24:5127-5139. [PMID: 32432777 DOI: 10.26355/eurrev_202005_21207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Phenotypic screening is one of the most practical approaches to the identification of mediators of behaviour, since it is difficult to model brain function in vitro, at a cellular level. We used a zebrafish (Danio rerio) behavioural assay to discover novel, natural, neuroactive compounds. MATERIALS AND METHODS A zebrafish behavioural assay was performed for seven natural compounds, obtained from plants. The behavioural profiles were compared to those of known psychoactive drugs. We characterised a natural compound exhibiting a behaviour profile similar to that of suvorexant, using in silico, in vitro and microarray expression analysis. RESULTS The behavioural analysis performed in this study classified central nervous system drugs according to their mechanism. Zebrafish treated with a natural compound, 8b-(4'-Hydroxytigloyloxy) costunolide (8b), showed behaviour profiles similar to those of zebrafish treated with suvorexant, a known orexin antagonist. This behavioural assay was validated using in silico and in vitro assays, which revealed that the new compound was a dual orexin receptor antagonist. In addition, transcriptome analysis suggested that 8b might regulate the nuclear factor-κB (NF-κB) related pathway. CONCLUSIONS We conclude that zebrafish phenotypic screening, combined with in silico assays and gene expression profiling, is a useful strategy to discover and characterize novel therapeutic compounds, including natural products.
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Affiliation(s)
- M Yamanaka
- Department of Systems Pharmacology, Mie University, Graduate School of Medicine, Tsu, Mie, Japan.
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Kanai O, Ito T, Saito Z, Yamamoto Y, Fujita K, Okamura M, Hashimoto M, Nakatani K, Sawai S, Mio T. P01.17 An Exploratory Study of Associating Factors for Disease Progression After Response to Immune Checkpoint Inhibitor Monotherapy. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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5
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Fujita K, Okamura M, Yamamoto Y, Kanai O, Nakatani K, Horimoto K, Hashimoto M, Sawai S, Mio T. 344P Single-centre analysis of anti-resorptive agent-related osteonecrosis of the jaw in lung cancer patients. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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6
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Nakamura K, Nishiura M, Okamura M, Kanesue T, Ikeda S, Cannavo A. Feasibility study of a compact heavy ion source for investigation of laboratory magnetospheric plasma. Rev Sci Instrum 2020; 91:033503. [PMID: 32260004 DOI: 10.1063/1.5128642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 03/02/2020] [Indexed: 06/11/2023]
Abstract
We are developing a laser ion source to provide a high brightness multi-charged heavy ion beam as a part of the heavy ion beam probe system, which will be used to diagnose plasma potential in the Ring Trap 1 device at the University of Tokyo. As a probe beam, Nb2+ was selected, and a detailed laser irradiation condition was explored. It was found that the laser power density of 1.2 × 109 W/cm2 gives the maximum particle number of Nb2+ per laser energy from a niobium foil target. Essential ablation plasma parameters to design the laser ion source were also obtained. The expected beam current was more than 12 mA/cm2, with a pulse width of 3.1 µs at 200 mm away from the target.
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Affiliation(s)
- K Nakamura
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - M Nishiura
- Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - M Okamura
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0198, Japan
| | - T Kanesue
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - S Ikeda
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - A Cannavo
- Nuclear Physics Institute of CAS, Rez, Prague 25068, Czech Republic
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7
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Cannavò A, Takahashi K, Okamura M, Ceccio G, Kanesue T, Ikeda S. Optimization of laser-target parameters for the production of stable lithium beam. Rev Sci Instrum 2020; 91:033317. [PMID: 32259987 DOI: 10.1063/1.5128547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 03/02/2020] [Indexed: 06/11/2023]
Abstract
A laser ion source coupled with a radio frequency quadrupole linac accelerator is being proposed as a suitable system for the production of a low energy, high-current stable lithium beam. In order to maximize the lithium yield, plasmas generated by laser ablation of different materials based on lithium (Li, LiOH, and LiNbO3) have been characterized by using a Faraday cup and an electrostatic ion analyzer in the time of flight configuration. A wide range of laser power density has been investigated (109-1012 W/cm2) using two Nd:YAG lasers operating at different wavelengths (1064 nm and 532 nm), pulse durations (6 ns and 17 ns), and maximum energies (1400 mJ and 210 mJ). This paper outlines the pros and cons of the investigated materials by studying how the ion energy, yields, and charge state distributions are modified when the laser power density is changed. Considerable attention has been paid to the higher charge states of oxygen, which may occur with the same mass-to-charge ratio of Li3+. The analysis has evidenced that LiNbO3 represents a valid target since it allows minimizing the O6+/7Li3+ ratio down to 2.5% by using a laser power density of 1.8 × 1010 W/cm2. For such a condition, a Li3+ current of 1.4 mA/cm2 has been measured.
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Affiliation(s)
- A Cannavò
- Nuclear Physics Institute of CAS, Rez, 25068 Prague, Czech Republic
| | - K Takahashi
- Department of Electrical Engineering, Nagaoka University of Technology, Niigata 940-2188, Japan
| | - M Okamura
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - G Ceccio
- Nuclear Physics Institute of CAS, Rez, 25068 Prague, Czech Republic
| | - T Kanesue
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - S Ikeda
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
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8
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Kondrashev S, Beebe E, Kanesue T, Okamura M, Ritter J, Scott R. Design of target irradiation and diagnostic chamber to study ps-laser generated plasma as a source of singly charged ions for external injection into an electron beam ion source. Rev Sci Instrum 2020; 91:023320. [PMID: 32113381 DOI: 10.1063/1.5127833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 02/01/2020] [Indexed: 06/10/2023]
Abstract
High repetition-rate (∼10 kHz) ps-lasers are becoming available on the market with reasonable cost and may offer several advantages compared to ns-lasers by generating nearly continuous beams of singly charged ions appropriate for the "slow" injection mode into the Electron Beam Ion Source (EBIS). To evaluate these advantages, we will perform studies of a ps-laser generated plasma using a laser with a pulse duration of 8 ps and energy up to 5 mJ per pulse. A vacuum chamber equipped with a 3D target positioner, a focusing lens, and a Faraday Cup has been designed and built for this study. Lens-to-target distance variations have been measured using a laser tracker over the whole range of horizontal and vertical translation for all five targets we will use. The variations were found to be within ±150 µm. This degree of "target flatness" should be acceptable for our experimental conditions. Ion currents and ion pulse durations of various elements (from Al to Ta) will be measured for different target irradiation conditions (focal spot size and laser pulse energy). The results obtained will allow us to specify all parameters and geometry of a laser ion source based on a ps-laser to provide external ion injection into the relativistic heavy ion collider EBIS.
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Affiliation(s)
- S Kondrashev
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - E Beebe
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - T Kanesue
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Okamura
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - J Ritter
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - R Scott
- Argonne National Laboratory, Argonne, Illinois 60439, USA
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9
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Okamura M, Beebe E, Ikeda S, Kanesue T, Raparia D, Muench L, Karino T, Haba H. 96Zr beam production for isobar experiment in relativistic heavy ion collider. Rev Sci Instrum 2020; 91:013319. [PMID: 32012530 DOI: 10.1063/1.5128618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 12/26/2019] [Indexed: 06/10/2023]
Abstract
To investigate the chiral magnetic effect, 96Zr and 96Ru beams were accelerated at the relativistic heavy ion collider (RHIC) during Run-18 at Brookhaven National Laboratory. The 96Zr beam was provided from the electron beam ion source (EBIS) injector, which consists of a laser ion source, an EBIS high charge state ion breeder, a 300 keV/u radio frequency quadrupole, and a 2 MeV/u interdigital H type drift tube linear accelerator (IH-DTL). The natural abundance of 96Zr is only 2.8% with about 50% of 90Zr. To obtain a sufficient beam current, Zr material enriched to about 60% of 96Zr was used. The only available form of the enriched material was zirconium oxide (ZrO2) powder, which was not well suited for a laser ion source target. We studied and established a sintering technique of the ZrO2 powder to make a solid sample which could be installed into the laser ion source. The singly charged Zr was produced in a laser ablation plasma, extracted, and delivered to the EBIS to be ionized further to 96Zr16+. We optimized the laser irradiation condition, the EBIS confinement time, and transport through the RF linacs to maximize the performance of the injector. The total number of shots provided from the laser ion source for injection into the EBIS was 489 910. The EBIS facility provided a 192 MeV stable beam of 96Zr16+ ions to the booster ring of alternating gradient synchrotron (AGS) for further acceleration and stripping in the AGS/RHIC complex, allowing for successful data acquisition at the Solenoidal Tracker at the RHIC.
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Affiliation(s)
- M Okamura
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - E Beebe
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - S Ikeda
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - T Kanesue
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - D Raparia
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - L Muench
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - T Karino
- Nishina Center for Accelerator-Based Science, RIKEN, Saitama 351-0198, Japan
| | - H Haba
- Nishina Center for Accelerator-Based Science, RIKEN, Saitama 351-0198, Japan
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10
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Kondrashev S, Beebe E, Okamura M. Cluster ion source for external injection and high capacity filling of light elements into the relativistic heavy ion collider electron beam ion source. Rev Sci Instrum 2019; 90:113314. [PMID: 31779422 DOI: 10.1063/1.5127831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 10/26/2019] [Indexed: 06/10/2023]
Abstract
An advanced Electron Beam Ion Source (EBIS) is the primary ion source to supply highly charged ion beams of different elements to the Relativistic Heavy Ion Collider (RHIC) and to the NASA Space Radiation Laboratory (NSRL). Intense beams of highly charged ions of various elements of the periodic table, ranging from helium to uranium, have been demonstrated since EBIS became operational in 2010. EBIS routinely provides ion beams to RHIC and NSRL quasisimultaneously with about 1 s switching time between different ion species. Such unique flexibility and rapid switching between ion species are based on external injection of singly charged ions into the EBIS trap either in "fast" or "slow" injection modes. At present, a Laser Ion Source (LIS) provides most of the ion species of solid materials using the "fast" injection mode into the EBIS trap and a Hollow Cathode Ion Source (HCIS) provides most of the ion species of gaseous elements using the "slow" injection mode into the EBIS trap. Gas injection into the EBIS trap is also possible and has been used but imposes some restrictions for the simultaneous generation of highly charged ions such as Au32+ ions for RHIC and ions of gaseous species for NSRL. Because light ions have relatively high velocity inside the EBIS trap, efficient injection of hydrogen and helium ions and filling of the EBIS trap to high capacity is difficult from either LIS or HCIS. To overcome this restriction and enhance EBIS operational capability, we suggest injecting beams of hydrogen and helium cluster ions into the EBIS trap. Required parameters of cluster ion beam injection into the EBIS trap are estimated, and advantages of such an injection are highlighted. A cluster ion source with required high intensity is visible and will be designed, built, optimized, and tested.
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Affiliation(s)
- S Kondrashev
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - E Beebe
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Okamura
- Brookhaven National Laboratory, Upton, New York 11973, USA
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11
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Okamura M, Kaneko M, Ojima S, Sano H, Shindo J, Shirafuji H, Yamamoto S, Tanabe T, Hu D. Differential distribution of Salmonella serovars and Campylobacter spp. isolates in free-living crows and broiler chickens in Aomori, Japan. Int J Infect Dis 2019. [DOI: 10.1016/j.ijid.2018.11.174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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12
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Hu DL, Ono HK, Isayama S, Okada R, Okamura M, Lei LC, Liu ZS, Zhang XC, Liu MY, Cui JC, Nakane A. Biological characteristics of staphylococcal enterotoxin Q and its potential risk for food poisoning. J Appl Microbiol 2017; 122:1672-1679. [PMID: 28375567 DOI: 10.1111/jam.13462] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 03/08/2017] [Accepted: 03/24/2017] [Indexed: 11/30/2022]
Abstract
AIMS To elucidate the biological characteristics and stability of a newly identified staphylococcal enterotoxin Q (SEQ) against heating and digestive enzymes and to evaluate the risk of seq-harbouring Staphylococcus aureus in food poisoning. METHODS AND RESULTS Purified SEQ was treated with heating, pepsin and trypsin which are related to food cooking, stomach and intestine conditions, respectively. Superantigenic activity of SEQ was assessed by determining the ability of IL-2 induction in mouse spleen cells. The emetic activity of SEQ was assessed using house musk shrew, a small emetic animal model. The results revealed that SEQ exhibits a remarkable resistance to heat treatment and pepsin digestion and has significant superantigenic and emetic activities. Furthermore, a sandwich ELISA for detection of SEQ production was developed, and the results showed that seq-harboring S. aureus isolates produce a large amount of SEQ. CONCLUSIONS The newly identified SEQ had remarkable stability to heat treatment and digestive enzyme degradation and exhibited significant superantigenic and emetic activities. In addition, seq-harbouring S. aureus isolated from food poisoning outbreaks produced a large amount of SEQ, suggesting that seq-harbouring S. aureus could potentially be a hazard for food safety. SIGNIFICANCE AND IMPACT OF THE STUDY This study found, for the first time, that SEQ, a nonclassical SE, had remarkable stability to heat treatment and enzyme degradation and exhibited significant emetic activity, indicating that SEQ is a high-risk toxin in food poisoning.
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Affiliation(s)
- D-L Hu
- College of Veterinary Medicine, Jilin University, Changchun, Jiling, China.,Department of Zoonoses, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan.,Department of Microbiology and Immunology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - H K Ono
- Department of Zoonoses, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan.,Department of Microbiology and Immunology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
| | - S Isayama
- Department of Zoonoses, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan
| | - R Okada
- Department of Zoonoses, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan
| | - M Okamura
- Department of Zoonoses, Kitasato University School of Veterinary Medicine, Towada, Aomori, Japan
| | - L C Lei
- College of Veterinary Medicine, Jilin University, Changchun, Jiling, China
| | - Z S Liu
- College of Veterinary Medicine, Jilin University, Changchun, Jiling, China
| | - X-C Zhang
- College of Veterinary Medicine, Jilin University, Changchun, Jiling, China
| | - M Y Liu
- College of Veterinary Medicine, Jilin University, Changchun, Jiling, China
| | - J C Cui
- College of Life Science, Dalian Minzu University, Dalian, Liaoning, China
| | - A Nakane
- Department of Microbiology and Immunology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori, Japan
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Iizuka K, Nishihira T, Takekawa H, Suzuki K, Igarashi H, Tsukahara Y, Suzuki A, Okamura M, Iwasaki A, Hirata K. Usefulness of acceleration time for assessment of stenosis in the internal carotid artery. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Igarashi H, Okamura M, Okabe R, Takekawa H, Suzuki K, Iizuka K, Tsukahara Y, Suzuki A, Iwasaki A, Hirata K. Influence of pulsed wave doppler angle on diagnosis of internal carotid artery stenosis. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Nohara C, Ohtake T, Hirabayashi K, Arii K, Kobayashi M, Okamura M, Fujita S, Takubo H. Retrospective study of percutaneous endoscopic gastrostomy in neurodegenerative disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2390] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Ohashi Y, Okamura M, Fang S, Tsutsui S, Tamaki N, Akatsuka A, Yoshimatsu K, Shiina I, Yamori T, Dan S. M-COPA, a new Golgi disruptor, inhibited growth of RTK-addicted human cancer cells. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)33051-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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Kodama K, Ryoshi H, Okamura M, Fujita S, Fujita J. New Determination Method of Flowability and Demolding Properties in Polyurethane Rigid Molded Foams. J CELL PLAST 2016. [DOI: 10.1177/0021955x9703300403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This paper describes a method of determinating the flowability and demolding property of molded polyurethane rigid foams by the dynamic viscoelasticity spectrometer. In response to periodic stimulations, the dynamic viscoelasticity gives us much physical information of polymers, including flowability and demolding properties. The flowability and demolding property can be determined from viscoelasticities and blowing pressures during the foaming process, which are measured with the newly developed apparatus. With this newly developed apparatus we show measurement examples on many kinds of systems, such as variation of base polyols (different functionalities) and blowing agent (CFC-11, HCFC-141b and cyclopentane), etc..
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Affiliation(s)
- K. Kodama
- Takeda Chemical Industries Ltd., 2-17-85 Juso-Honmachi, Yodogawa-ku, Osaka 532, Japan
| | - H. Ryoshi
- Takeda Chemical Industries Ltd., 2-17-85 Juso-Honmachi, Yodogawa-ku, Osaka 532, Japan
| | - M. Okamura
- Takeda Chemical Industries Ltd., 2-17-85 Juso-Honmachi, Yodogawa-ku, Osaka 532, Japan
| | - S. Fujita
- Takeda Chemical Industries Ltd., 2-17-85 Juso-Honmachi, Yodogawa-ku, Osaka 532, Japan
| | - J. Fujita
- Takeda Chemical Industries Ltd., 2-17-85 Juso-Honmachi, Yodogawa-ku, Osaka 532, Japan
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Kanai O, Fujita K, Okamura M, Nakatani K, Mio T. Severe exacerbation or manifestation of primary disease related to nivolumab in non-small-cell lung cancer patients with poor performance status or brain metastases. Ann Oncol 2016; 27:1354-6. [DOI: 10.1093/annonc/mdw148] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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19
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Okamura M, Stifler C, Palm K, Steski D, Ikeda S, Kumaki M, Kanesue T. Proton beam production by a laser ion source with hydride target. Rev Sci Instrum 2016; 87:02A906. [PMID: 26931967 DOI: 10.1063/1.4933341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We studied proton beam production from a laser ion source using hydrogen rich target materials. In general, gas based species are not suitable for laser ion sources since formation of a dense laser target is difficult. In order to achieve reliable operation, we tested hydride targets using a sub nanosecond Q-switched Nd-YAG laser, which may help suppress target material consumption. We detected enough yields of protons from a titanium hydride target without degradation of beam current during the experiment. The combination of a sub nanosecond laser and compressed hydride target may provide stable proton beam.
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Affiliation(s)
- M Okamura
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - C Stifler
- Engineering Physics Systems Department, Providence College, Providence, Rhode Island 02918, USA
| | - K Palm
- Department of Physics, Cornell University, Ithaca, New York 14853, USA
| | - D Steski
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - S Ikeda
- Nishina Center for Accelerator-Based Science, RIKEN, Saitama, Japan
| | - M Kumaki
- Nishina Center for Accelerator-Based Science, RIKEN, Saitama, Japan
| | - T Kanesue
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
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Ikeda S, Kumaki M, Kanesue T, Okamura M. Effect of the solenoid in various conditions of the laser ion source at Brookhaven National Laboratory. Rev Sci Instrum 2016; 87:02A915. [PMID: 26931976 DOI: 10.1063/1.4935785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In the laser ion source (LIS) at the Brookhaven National Laboratory (BNL), a solenoid is used to guide the laser ablation plasma and modulate the extracted beam current. Many types of ion species are guided. In some cases, the plasma plume is injected into the solenoid away from the solenoidal axis. To investigate the effects of the solenoid on the beam extracted from the plasma that has different properties, the beam current was measured in the setup of the LIS at the BNL. The beam current of Li, Al, Si, Fe, and Au increased when the magnetic field was applied. For most of the species the peak current and the total charge within a single beam pulse increased around 10 times with a magnetic field less than 100 G. In addition, for some species the rate of increase of the peak currents became smaller when the magnetic flux densities were larger than certain values depending on the species. In this case, the current waveforms were distorted. At the same magnetic field value, the field was more effective on lighter species than on heavier ones. When plasma was injected offset from the axis of the solenoid, peak current and total charge became half of those without offset. The experimental data are useful for the operation of the LIS at the BNL.
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Affiliation(s)
- S Ikeda
- Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Yokohama, Kanagawa 216-8502, Japan
| | - M Kumaki
- Nishina Center for Accelerator-Based Science, RIKEN, Wako, Saitama 351-0108, Japan
| | - T Kanesue
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - M Okamura
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
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Okamura M, Palm K, Stifler C, Steski D, Ikeda S, Kumaki M, Kanesue T. Calcium and lithium ion production for laser ion source. Rev Sci Instrum 2016; 87:02A901. [PMID: 26931962 DOI: 10.1063/1.4931619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Calcium and lithium ion beams are required by NASA Space Radiation Laboratory at Brookhaven National Laboratory to simulate the effects of cosmic radiation. To identify the difficulties in providing such highly reactive materials as laser targets, both species were experimentally tested. Plate shaped lithium and calcium targets were fabricated to create ablation plasmas with a 6 ns 1064 nm neodymium-doped yttrium aluminum garnet laser. We found significant oxygen contamination in both the Ca and Li high charge state beams due to the rapid oxidation of the surfaces. A large spot size, low power density laser was used to create low charge state beams without scanning the targets. The low charge state Ca beam did not have any apparent oxygen contamination, showing the potential to clean the target entirely of oxide with a low power beam once in the chamber. The Li target was clearly still oxidizing in the chamber after each low power shot. To measure the rate of oxidation, we shot the low power laser at the target repeatedly at 10 s, 30 s, 60 s, and 120 s interval lengths, showing a linear relation between the interval time and the amount of oxygen in the beam.
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Affiliation(s)
- M Okamura
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - K Palm
- Department of Physics, Cornell University, Ithaca, New York 14853-2501, USA
| | - C Stifler
- Engineering Physics Systems Department, Providence College, Providence, Rhode Island 02918, USA
| | - D Steski
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - S Ikeda
- Nishina Center for Accelerator-Based Science, RIKEN, Saitama, Japan
| | - M Kumaki
- Nishina Center for Accelerator-Based Science, RIKEN, Saitama, Japan
| | - T Kanesue
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
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Abstract
We have investigated laser ablation plasma of various species using nanosecond and sub-nanosecond lasers for both high and low charge state ion productions. We found that with sub-nanosecond laser, the generated plasma has a long tail which has low charge state ions determined by an electrostatic ion analyzer even under the laser irradiation condition for highly charged ion production. This can be caused by insufficient laser absorption in plasma plume. This property might be suitable for low charge state ion production. We used a nanosecond laser and a sub-nanosecond laser for low charge state ion production to investigate the difference of generated plasma using the Zirconium target.
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Affiliation(s)
- T Kanesue
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Kumaki
- Research Institute for Science and Engineering, Waseda University, Tokyo 169-8555, Japan
| | - S Ikeda
- Nishina Center for Accelerator-Based Science, RIKEN, Saitama 351-0198, Japan
| | - M Okamura
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
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Ikeda S, Takahashi K, Okamura M, Horioka K. Behavior of moving plasma in solenoidal magnetic field in a laser ion source. Rev Sci Instrum 2016; 87:02A912. [PMID: 26931973 DOI: 10.1063/1.4935646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In a laser ion source, a solenoidal magnetic field is useful to guide the plasma and to control the extracted beam current. However, the behavior of the plasma drifting in the magnetic field has not been well understood. Therefore, to investigate the behavior, we measured the plasma ion current and the total charge within a single pulse in the solenoid by changing the distance from the entrance of the solenoid to a detector. We observed that the decrease of the total charge along the distance became smaller as the magnetic field became larger and then the charge became almost constant with a certain magnetic flux density. The results indicate that the transverse spreading speed of the plasma decreased with increasing the field and the plasma was confined transversely with the magnetic flux density. We found that the reason of the confinement was not magnetization of ions but an influence induced by electrons.
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Affiliation(s)
- S Ikeda
- Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8502, Japan
| | - K Takahashi
- Department of Electrical Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2137, Japan
| | - M Okamura
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - K Horioka
- Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8502, Japan
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Kanesue T, Kumaki M, Ikeda S, Okamura M. Laser ion source for isobaric heavy ion collider experiment. Rev Sci Instrum 2016; 87:02A920. [PMID: 26931981 DOI: 10.1063/1.4940405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Heavy-ion collider experiment in isobaric system is under investigation at Relativistic Heavy Ion Collider. For this experiment, ion source is required to maximize the abundance of the intended isotope. The candidate of the experiment is (96)Ru + (96)Zr. Since the natural abundance of particular isotope is low and composition of isotope from ion source depends on the composites of the target, an isotope enriched material may be needed as a target. We studied the performance of the laser ion source required for the experiment for Zr ions.
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Affiliation(s)
- T Kanesue
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Kumaki
- Research Institute for Science and Engineering, Waseda University, Tokyo 169-8555, Japan
| | - S Ikeda
- Nishina Center for Accelerator-Based Science, RIKEN, Saitama 351-0198, Japan
| | - M Okamura
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
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Okamura M, Kanayama Y, Negoro N, Inoue T, Takeda T. Long-term effects of calcium antagonists and angiotensin-converting enzyme inhibitors in patients with chronic renal failure of IgA nephropathy. Contrib Nephrol 2015; 90:161-5. [PMID: 1959342 DOI: 10.1159/000420139] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Long-term effects of Ca antagonist and ACE inhibitor on renal function in hypertensive patients with chronic renal failure of IgA nephropathy were studied. Both Ca antagonists and ACE inhibitors were equally effective in reducing blood pressure.
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Affiliation(s)
- M Okamura
- First Department of Internal Medicine, Osaka City University Medical School, Japan
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Ohashi Y, Okamura M, Hirosawa A, Akatsuka A, Shiina I, Yoshimatsu K, Yamori T, Dan S. 574 M-COPA, a Golgi disruptor, inhibits cell surface expression of MET protein and exhibits antitumor activity against MET-addicted cancers. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)70700-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Okamura M, Kanesue T, Yamamoto T, Fuwa Y. Iron beam acceleration using direct plasma injection scheme. Rev Sci Instrum 2014; 85:02B907. [PMID: 24593612 DOI: 10.1063/1.4825163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A new set of vanes of radio frequency quadrupole (RFQ) accelerator was commissioned using highly charged iron beam. To supply high intensity heavy ion beams to the RFQ, direct plasma injection scheme (DPIS) with a confinement solenoid was adopted. One of the difficulties to utilize the combination of DPIS and a solenoid field is a complexity of electro magnetic field at the beam extraction region, since biasing high static electric field for ion extraction, RFQ focusing field, and the solenoid magnetic field fill the same space simultaneously. To mitigate the complexity, a newly designed magnetic field clamps were used. The intense iron beam was observed with bunched structure and the total accelerated current reached 2.5 nC.
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Affiliation(s)
- M Okamura
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - T Kanesue
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - T Yamamoto
- Waseda University, Shinjuku, Tokyo 169-8555, Japan
| | - Y Fuwa
- Kyoto University, Uji, Kyoto 611-0011, Japan
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Sekine M, Ikeda S, Hayashizaki N, Kanesue T, Okamura M. Multiple species beam production on laser ion source for electron beam ion source in Brookhaven National Laboratory. Rev Sci Instrum 2014; 85:02B920. [PMID: 24593625 DOI: 10.1063/1.4854876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Extracted ion beams from the test laser ion source (LIS) were transported through a test beam transport line which is almost identical to the actual primary beam transport in the current electron beam ion source apparatus. The tested species were C, Al, Si, Cr, Fe, Cu, Ag, Ta, and Au. The all measured beam currents fulfilled the requirements. However, in the case of light mass ions, the recorded emittance shapes have larger aberrations and the RMS values are higher than 0.06 π mm mrad, which is the design goal. Since we have margin to enhance the beam current, if we then allow some beam losses at the injection point, the number of the single charged ions within the acceptance can be supplied. For heaver ions like Ag, Ta, and Au, the LIS showed very good performance.
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Affiliation(s)
- M Sekine
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Meguro, Tokyo, Japan
| | | | - N Hayashizaki
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Meguro, Tokyo, Japan
| | - T Kanesue
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Okamura
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
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Fuwa Y, Ikeda S, Kumaki M, Sekine M, Munemoto N, Cinquegrani D, Romanelli M, Kanesue T, Okamura M, Iwashita Y. Comparison of graphite materials for targets of laser ion source. Rev Sci Instrum 2014; 85:02B924. [PMID: 24593629 DOI: 10.1063/1.4862210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
To investigate efficient graphite material for carbon ion production in laser ion source, the plasma properties produced from these materials are measured. Comparing acquired current profile and charge state distribution, the distributions of ions in laser induced plasma from isotropic graphite and single crystal of graphite are different. The produced quantity of C(6+) from isotropic materials is larger than that from single crystal.
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Affiliation(s)
- Y Fuwa
- Graduate School of Science, Kyoto University, Kyoto, Japan
| | | | | | | | - N Munemoto
- Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Yokohama, Tokyo, Japan
| | - D Cinquegrani
- Nuclear Engineering and Radiological Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - M Romanelli
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA
| | - T Kanesue
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York, 11973, USA
| | - M Okamura
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York, 11973, USA
| | - Y Iwashita
- Institute for Chemical Research, Kyoto University, Uji, Kyoto, Japan
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Fuwa Y, Ikeda S, Kumaki M, Sekine M, Cinquegrani D, Romanelli M, Kanesue T, Okamura M, Iwashita Y. Interaction of plasmas in laser ion source with double laser system. Rev Sci Instrum 2014; 85:02B916. [PMID: 24593621 DOI: 10.1063/1.4854255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Multiple laser shots could be used to elongate an ion beam pulse width or to intensify beam current from laser ion sources. In order to confirm the feasibility of the multiple shot scheme, we investigated the properties of plasmas produced by double laser shots. We found that when the interval of the laser shots is shorter than 10 μs, the ion current profile had a prominent peak, which is not observed in single laser experiments. The height of this peak was up to five times larger than that of single laser experiment.
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Affiliation(s)
- Y Fuwa
- Graduate School of Science, Kyoto University, Kyoto, Japan
| | | | | | | | - D Cinquegrani
- Nuclear Engineering and Radiological Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - M Romanelli
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14850, USA
| | - T Kanesue
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - M Okamura
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Y Iwashita
- Institute for Chemical Research, Kyoto University, Uji, Kyoto, Japan
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Okamura M, Suzuki K, Numao A, Takekawa H, Miyamoto M, Miyamoto T, Iwanami M, Takada E, Hirata K. A semi-quantified evaluation of substantia nigra hyperechogenicity in Parkinson's disease and Parkinsonian syndrome. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kurnatowska I, Grzelak P, Masajtis-Zagajewska A, Kaczmarska M, Stefanczyk L, Nowicki M, Wyskida K, Zak-Golab A, Labuzek K, Ficek R, Pospiech K, Olszanecka-Glinianowicz M, Okopien B, Wiecek A, Chudek J, Morena M, Cristol JP, Jaussent I, Chenine L, Brugueirolle C, Leray-Moragues H, Schved JF, Canaud B, Dupuy AM, Giansily-Blaizot M, Brandenburg VM, Specht P, Floege J, Ketteler M, Hwang IH, Lee KN, Kim IY, Lee DW, Lee SB, Shin MJ, Rhee H, Yang BY, Seong EY, Kwak IS, Chitalia N, Ismail T, Tooth L, Boa F, Goldsmith D, Kaski J, Banerjee D, Iimori S, Noda Y, Okado T, Naito S, Rai T, Uchida S, Sasaki S, Daenen K, Fourneau I, Verbeken E, Hoylaerts MF, Bammens B, Daenen K, Fourneau I, Opdenakker G, Hoylaerts MF, Bammens B, Christensson A, Melander OS, Fjellstedt E, Berglund G, Andersson-Ohlsson M, Shima H, Shoji T, Naganuma T, Nakatani S, Mori K, Ishimura E, Emoto M, Okamura M, Nakatani T, Inaba M, Hafez MH, Mostafa MA, Harash EL, Okely AEL, Hendi YM, Anan MI, Temraz MEL, Fouad MY, Nassar WF, Barrios C, Otero S, Soler M, Rodriguez E, Collado S, Faura A, Mojal S, Betriu A, Fernandez E, Pascual J, Kudo K, Suzuki K, Ichikawa K, Konta T, Kubota I, Abdalla AA, Weiland A, Casserly LF, Cronin CJ, Hannigan A, Nguyen HT, Stack AG, Naito S, Iimori S, Okado T, Noda Y, Rai T, Uchida S, Sasaki S, Bolignano D, Tripepi R, Leonardis D, Mallamaci F, Zoccali C, Giansily-Blaizot M, Jaussent I, Cristol JP, Chenine L, Brugueirolle C, Leray-Moragues H, Schved JF, Canaud B, Dupuy AM, Morena M, Sugahara M, Sugimoto I, Uchida L, Chikamori M, Honda T, Miura R, Tsuchiya A, Kanemitsu T, Kobayashi M, Kotera N, Ishizawa K, Sakurai Y, Mise N, Park HC, Park SK, Lee JE, Ha SK, Choi HY. Epidemiology - cardiovascular outcomes. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Asakawa Y, Suzuki K, Takekawa H, Okamura M, Komagamine T, Kawasaki A, Yamamoto M, Sada T, Hirata K. The ‘Mickey Mouse ears’ sign: a bilateral cerebral peduncular infarction. Eur J Neurol 2013; 20:e37-9. [DOI: 10.1111/ene.12027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Accepted: 10/04/2012] [Indexed: 11/27/2022]
Affiliation(s)
- Y. Asakawa
- Department of Neurology; Dokkyo Medical University; Tochigi; Japan
| | - K. Suzuki
- Department of Neurology; Dokkyo Medical University; Tochigi; Japan
| | - H. Takekawa
- Department of Neurology; Dokkyo Medical University; Tochigi; Japan
| | - M. Okamura
- Department of Neurology; Dokkyo Medical University; Tochigi; Japan
| | - T. Komagamine
- Department of Neurology; Dokkyo Medical University; Tochigi; Japan
| | - A. Kawasaki
- Department of Neurology; Dokkyo Medical University; Tochigi; Japan
| | - M. Yamamoto
- Department of Neurology; Dokkyo Medical University; Tochigi; Japan
| | - T. Sada
- Department of Neurology; Dokkyo Medical University; Tochigi; Japan
| | - K. Hirata
- Department of Neurology; Dokkyo Medical University; Tochigi; Japan
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Okamura M, Ueda M, Noda Y, Kuno Y, Kashimoto T, Takehara K, Nakamura M. Immunization with outer membrane protein A from Salmonella enterica serovar Enteritidis induces humoral immune response but no protection against homologous challenge in chickens. Poult Sci 2012; 91:2444-9. [PMID: 22991526 DOI: 10.3382/ps.2012-02303] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Vaccination of poultry is one promising strategy to mitigate Salmonella infection in poultry and, in turn, humans as well. We evaluated the efficacy of outer membrane protein A (OmpA) as a novel vaccine candidate against Salmonella in poultry. Native OmpA purified from Salmonella enterica serovar Enteritidis was mixed with adjuvant and administered intramuscularly to 41-d-old chicks. The vaccinated birds showed no decrease in cecal excretion and tissue colonization compared with the unvaccinated birds after oral challenge with 10(9) cfu of the homologous strain at 28 d postimmunization. However, this vaccination induced an increased level of serum anti-OmpA IgG. Similar results were obtained in the replication experiments using a recombinant OmpA with single and double doses. For the development of more effective component vaccines for avian salmonellosis, the vaccine efficacy of outer membrane proteins other than OmpA and route of immunization other than parenteral administration should be evaluated with regard to protection and immune responses, including mucosal IgA.
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Affiliation(s)
- M Okamura
- Kitasato University School of Veterinary Medicine, Aomori, Japan.
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Ohashi Y, Iijima H, Yamaotsu N, Yamazaki K, Okamura M, Sugimoto K, Hirono S, Dan S, Yamori T. 513 Development of a Novel Inhibitor of ADP-Ribosylation Factor 1 (Arf1) That Has Potential for Cancer Therapy. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)72310-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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36
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Sekine M, Kondo K, Okamura M, Hayashizaki N. A study of H+ production using metal hydride and other compounds by means of laser ion source. Rev Sci Instrum 2012; 83:02B318. [PMID: 22380297 DOI: 10.1063/1.3675385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A laser ion source can provide wide variety of ion beams from solid target materials, however, it has been difficult to create proton beam efficiently. We examined capability of proton production using beeswax, polyethylene, and metal hydrides (MgH(2) and ZrH(2)) as target materials. The results showed that beeswax and polyethylene could not be used to produce protons because these targets are transparent to the laser wavelength of 1064 nm. On the other hand, the metal hydrides could supply protons. Although the obtained particle numbers of protons were less than those of the metal ions, the metal hydrides could be used as a target for proton laser ion source.
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Affiliation(s)
- M Sekine
- Department of Nuclear Engineering, Tokyo Institute of Technology, Meguro, Tokyo, Japan.
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Pikin A, Alessi J, Beebe E, Kponou A, Okamura M, Raparia D, Ritter J, Tan Y, Kuznetsov G. Ion optics of RHIC electron beam ion source. Rev Sci Instrum 2012; 83:02A504. [PMID: 22380200 DOI: 10.1063/1.3666915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
RHIC electron beam ion source has been commissioned to operate as a versatile ion source on RHIC injection facility supplying ion species from He to Au for Booster. Except for light gaseous elements RHIC EBIS employs ion injection from several external primary ion sources. With electrostatic optics fast switching from one ion species to another can be done on a pulse to pulse mode. The design of an ion optical structure and the results of simulations for different ion species are presented. In the choice of optical elements special attention was paid to spherical aberrations for high-current space charge dominated ion beams. The combination of a gridded lens and a magnet lens in LEBT provides flexibility of optical control for a wide range of ion species to satisfy acceptance parameters of RFQ. The results of ion transmission measurements are presented.
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Affiliation(s)
- A Pikin
- Brookhaven National Laboratory, Upton, New York 11973, USA.
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38
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Okamura M, Kondo K, Allouche GG, Yamamoto T. Laser ion source with a double pulse laser system. Rev Sci Instrum 2012; 83:02B308. [PMID: 22380287 DOI: 10.1063/1.3670595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
To extend an ion beam pulse of a laser ion source, multiple laser shots could be used. To check the feasibility of this idea, we tested double laser irradiations on an iron target. When the interval of the two laser shots is longer than 10 μs, the obtained ion current profile was expressed as a sum of two individual expanded laser plasmas. However, if the interval is too close, a current reduction was observed. This technique can be effectively applied to low charge state ion production.
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Affiliation(s)
- M Okamura
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
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Kondo K, Yamamoto T, Sekine M, Okamura M. Laser ion source with solenoid for Brookhaven National Laboratory-electron beam ion source. Rev Sci Instrum 2012; 83:02B319. [PMID: 22380298 DOI: 10.1063/1.3675388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The electron beam ion source (EBIS) preinjector at Brookhaven National Laboratory (BNL) is a new heavy ion-preinjector for relativistic heavy ion collider (RHIC) and NASA Space Radiation Laboratory (NSRL). Laser ion source (LIS) is a primary ion source provider for the BNL-EBIS. LIS with solenoid at the plasma drift section can realize the low peak current (∼100 μA) with high charge (∼10 nC) which is the BNL-EBIS requirement. The gap between two solenoids does not cause serious plasma current decay, which helps us to make up the BNL-EBIS beamline.
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Affiliation(s)
- K Kondo
- Collider-Accelerator Department, Brookhaven National Laboratory, New York, USA.
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Okamura M, Sonobe M, Obara S, Kubo T, Nagai T, Noguchi M, Takehara K, Nakamura M. Potential egg contamination by Salmonella enterica serovar Typhimurium definitive type 104 following experimental infection of pullets at the onset of lay. Poult Sci 2010; 89:1629-34. [DOI: 10.3382/ps.2010-00774] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Shima H, Ishimura E, Naganuma T, Yamazaki T, Kobayashi I, Shidara K, Mori K, Takemoto Y, Shoji T, Inaba M, Okamura M, Nakatani T, Nishizawa Y. Cerebral microbleeds in predialysis patients with chronic kidney disease. Nephrol Dial Transplant 2010; 25:1554-1559. [DOI: 10.1093/ndt/gfp694] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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42
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Alessi JG, Barton D, Beebe E, Bellavia S, Gould O, Kponou A, Lambiase R, Lockey R, McNerney A, Mapes M, Marneris Y, Okamura M, Phillips D, Pikin AI, Raparia D, Ritter J, Snydstrup L, Theisen C, Wilinski M. The Brookhaven National Laboratory electron beam ion source for RHIC. Rev Sci Instrum 2010; 81:02A509. [PMID: 20192364 DOI: 10.1063/1.3292937] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
As part of a new heavy ion preinjector that will supply beams for the Relativistic Heavy Ion Collider and the National Aeronautics and Space Administration Space Radiation Laboratory, construction of a new electron beam ion source (EBIS) is now being completed. This source, based on the successful prototype Brookhaven National Laboratory Test EBIS, is designed to produce milliampere level currents of all ion species, with q/m=(1/6)-(1/2). Among the major components of this source are a 5 T, 2-m-long, 204 mm diameter warm bore superconducting solenoid, an electron gun designed to operate at a nominal current of 10 A, and an electron collector designed to dissipate approximately 300 kW of peak power. Careful attention has been paid to the design of the vacuum system, since a pressure of 10(-10) Torr is required in the trap region. The source includes several differential pumping stages, the trap can be baked to 400 C, and there are non-evaporable getter strips in the trap region. Power supplies include a 15 A, 15 kV electron collector power supply, and fast switchable power supplies for most of the 16 electrodes used for varying the trap potential distribution for ion injection, confinement, and extraction. The EBIS source and all EBIS power supplies sit on an isolated platform, which is pulsed up to a maximum of 100 kV during ion extraction. The EBIS is now fully assembled, and operation will be beginning following final vacuum and power supply tests. Details of the EBIS components are presented.
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Affiliation(s)
- J G Alessi
- Collider-Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
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Kondo K, Kanesue T, Tamura J, Dabrowski R, Okamura M. Laser plasma in a magnetic field. Rev Sci Instrum 2010; 81:02B716. [PMID: 20192456 DOI: 10.1063/1.3290860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Laser ion source (LIS) is a candidate among various heavy ion sources. A high density plasma produced by Nd:yttrium aluminum garnet laser with drift velocity realizes high current and high charge state ion beams. In order to obtain higher beam current, we made experiments using the LIS with a magnetic field by which a confinement effect can make higher beam current. We measured total current by Faraday cup and analyzed charge distribution by electrostatic ion analyzer. It is shown that the ion beam charge state is higher by a permanent magnet.
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Affiliation(s)
- K Kondo
- Department of Energy Sciences, Tokyo Institute of Technology, Yokohama 226-8502, Japan.
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Okamura M, Adeyemi A, Kanesue T, Tamura J, Kondo K, Dabrowski R. Magnetic plasma confinement for laser ion source. Rev Sci Instrum 2010; 81:02A510. [PMID: 20192365 DOI: 10.1063/1.3267312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A laser ion source (LIS) can easily provide a high current beam. However, it has been difficult to obtain a longer beam pulse while keeping a high current. On occasion, longer beam pulses are required by certain applications. For example, more than 10 micros of beam pulse is required for injecting highly charged beams to a large sized synchrotron. To extend beam pulse width, a solenoid field was applied at the drift space of the LIS at Brookhaven National Laboratory. The solenoid field suppressed the diverging angle of the expanding plasma and the beam pulse was widened. Also, it was observed that the plasma state was conserved after passing through a few hundred gauss of the 480 mm length solenoid field.
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Affiliation(s)
- M Okamura
- Brookhaven National Laboratory, Upton, New York 11973, USA.
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Kanesue T, Okamura M, Kondo K, Tamura J, Kashiwagi H, Zhang Z. Drift distance survey in direct plasma injection scheme for high current beam production. Rev Sci Instrum 2010; 81:02B723. [PMID: 20192463 DOI: 10.1063/1.3298845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In a laser ion source, plasma drift distance is one of the most important design parameters. Ion current density and beam pulse width are defined by plasma drift distance between a laser target and beam extraction position. In direct plasma injection scheme, which uses a laser ion source and a radio frequency quadrupole linac, we can apply relatively higher electric field at beam extraction due to the unique shape of a positively biased electrode. However, when we aim at very high current acceleration such as several tens of milliamperes, we observed mismatched beam extraction conditions. We tested three different ion current at ion extraction region by changing plasma drift distance to study better extraction condition. In this experiment, C(6+) beam was accelerated. We confirmed that matching condition can be improved by controlling plasma drift distance.
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Affiliation(s)
- T Kanesue
- Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Fukuoka 819-0395, Japan.
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Tamura J, Hattori T, Hayashizaki N, Ishibashi T, Kanesue T, Kashiwagi H, Kondo K, Okamura M. Particle simulation for direct plasma injection in a radio frequency quadrupole matching section. Rev Sci Instrum 2010; 81:02B726. [PMID: 20192466 DOI: 10.1063/1.3318208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We have been investigating direct plasma injection scheme (DPIS) for high-intensity heavy-ion beam acceleration. In the DPIS, laser-produced plasma is directly injected into a radio frequency quadrupole (RFQ) linac. To study the beam dynamics of the ion injection in the DPIS, we tracked particle motions in the RFQ matching section using three-dimensional particle-in-cell method. As a result of the numerical simulation, we found that the electrostatic field generated by the extraction electrode reduces the transmission efficiency. To avoid the radially defocusing force, the input beam into the RFQ has to be initially convergent. In the DPIS, further optimization of the plasma density is required for better matching.
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Affiliation(s)
- J Tamura
- Department of Energy Sciences, Tokyo Institute of Technology, Yokohama 226-8502, Japan.
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Kondo K, Kanesue T, Tamura J, Okamura M. Design study of primary ion provider for relativistic heavy ion collider electron beam ion source. Rev Sci Instrum 2010; 81:02A511. [PMID: 20192366 DOI: 10.1063/1.3292941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Brookhaven National Laboratory has developed the new preinjector system, electron beam ion source (EBIS) for relativistic heavy ion collider (RHIC) and National Aeronautics and Space Administration Space Radiation Laboratory. Design of primary ion provider is an essential problem since it is required to supply beams with different ion species to multiple users simultaneously. The laser ion source with a defocused laser can provide a low charge state and low emittance ion beam, and is a candidate for the primary ion source for RHIC-EBIS. We show a suitable design with appropriate drift length and solenoid, which helps to keep sufficient total charge number with longer pulse length. The whole design of primary ion source, as well as optics arrangement, solid targets configuration and heating about target, is presented.
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Affiliation(s)
- K Kondo
- Department of Energy Sciences, Tokyo Institute of Technology, Yokohama 226-8502, Japan.
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Lin S, Jaschke P, Wang H, Paddock M, Tufts A, Allen J, Rosell F, Mauk A, Okamura M, Beatty J, Woodbury N. Kinetics and Energetics of Electron Transfer Reactions in a Photosynthetic Bacterial Reaction Center Assembled with Zinc Bacteriochlorophylls. Biophys J 2009. [DOI: 10.1016/j.bpj.2008.12.1175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Okamura M, Takeuchi T, Jameson RA, Kondrashev S, Kashiwagi H, Sakakibara K, Kanesue T, Tamura J, Hattori T. Direct plasma injection scheme in accelerators. Rev Sci Instrum 2008; 79:02B314. [PMID: 18315180 DOI: 10.1063/1.2821590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The idea of direct plasma injection scheme (DPIS) was proposed in 2000. This new technique has been studied and proven to accelerate intense ion beams. To provide medium mass ions with highly charged states, small tabletop solid lasers were used for plasma production. Based on the measured plasma properties, aluminum and carbon ions were accelerated with more than 60 mA of current. The next experiments will use an radio frequency quadrupole designed for q/m=1/6 and explore beam productions using targets up to silver, and future work will explore production up to uranium. The DPIS has been established and is ready to be used with various accelerators which require pulsed high current, high charge state ion beams.
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Affiliation(s)
- M Okamura
- Brookhaven National Laboratory, NY 11973, USA.
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Huang H, Ahrens LA, Bai M, Brown K, Courant ED, Gardner C, Glenn JW, Lin F, Luccio AU, Mackay WW, Okamura M, Ptitsyn V, Roser T, Takano J, Tepikian S, Tsoupas N, Zelenski A, Zeno K. Overcoming depolarizing resonances with dual helical partial Siberian snakes. Phys Rev Lett 2007; 99:154801. [PMID: 17995173 DOI: 10.1103/physrevlett.99.154801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2007] [Indexed: 05/25/2023]
Abstract
Acceleration of polarized protons in the energy range of 5 to 25 GeV is challenging. In a medium energy accelerator, the depolarizing spin resonances are strong enough to cause significant polarization loss but full Siberian snakes cause intolerably large orbit excursions and are also not feasible since straight sections usually are too short. Recently, two helical partial Siberian snakes with double pitch design have been installed in the Brookhaven Alternating Gradient Synchrotron (AGS). With a careful setup of optics at injection and along the energy ramp, this combination can eliminate the intrinsic and imperfection depolarizing resonances otherwise encountered during acceleration to maintain a high intensity polarized beam in medium energy synchrotrons. The observation of partial snake resonances of higher than second order will also be described.
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Affiliation(s)
- H Huang
- Brookhaven National Laboratory, Upton, New York 11973, USA
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