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Yamada T, Daido H, Shibata T. Development of a laser-driven ultrasonic technology for characterizations of heated and aged concrete samples. J NUCL SCI TECHNOL 2021. [DOI: 10.1080/00223131.2021.1996295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Tomonori Yamada
- Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Japan Atomic Energy Agency, Ibaraki, Japan
- Research and Development Department The Wakasa Wan Energy Research Center, Fukui, Japan
| | - Hiroyuki Daido
- Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Japan Atomic Energy Agency, Ibaraki, Japan
- Laser Energy Research Team, Institute for Laser Technology, Osaka, Japan
| | - Takuya Shibata
- Collaborative Laboratories for Advanced Decommissioning Science (CLADS), Japan Atomic Energy Agency, Ibaraki, Japan
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Yamada T, Takebe T, Ishizuka I, Daido H, Hanari T, Shibata T, Ohmori S, Kurosawa K, Sasaki G, Nakada M, Sakai H. Development of a laser chipping technique combined with water jet for retrieval of fuel debris at Fukushima Daiichi Nuclear Power Station. J NUCL SCI TECHNOL 2019. [DOI: 10.1080/00223131.2019.1647890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Tomonori Yamada
- Collaborative Laboratories for Advanced Decommissioning Science, Japan Atomic Energy Agency, Fukushima, Japan
| | - Toshihiko Takebe
- Collaborative Laboratories for Advanced Decommissioning Science, Japan Atomic Energy Agency, Fukushima, Japan
- Plant EquipmentDivision, Sugino Machine Ltd, Toyama, Japan
| | - Ippei Ishizuka
- Nuclear Engineering and Product Division, Hitachi-GE Nuclear Energy, Ltd, Ibaraki, Japan
| | - Hiroyuki Daido
- Collaborative Laboratories for Advanced Decommissioning Science, Japan Atomic Energy Agency, Fukushima, Japan
| | - Toshihide Hanari
- Collaborative Laboratories for Advanced Decommissioning Science, Japan Atomic Energy Agency, Fukushima, Japan
| | - Takuya Shibata
- Collaborative Laboratories for Advanced Decommissioning Science, Japan Atomic Energy Agency, Fukushima, Japan
| | - Shinya Ohmori
- Nuclear Engineering and Product Division, Hitachi-GE Nuclear Energy, Ltd, Ibaraki, Japan
| | - Koichi Kurosawa
- Nuclear Engineering and Product Division, Hitachi-GE Nuclear Energy, Ltd, Ibaraki, Japan
| | - Go Sasaki
- Plant EquipmentDivision, Sugino Machine Ltd, Toyama, Japan
| | | | - Hideaki Sakai
- Plant EquipmentDivision, Sugino Machine Ltd, Toyama, Japan
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Abstract
This paper is concerned with the relaxation dynamics of a large population of identical phase oscillators, each of which interacts with all the others through random couplings whose parameters obey the same Gaussian distribution with the average equal to zero and are mutually independent. The results obtained by numerical simulation suggest that for the infinite-size system, the absolute value of Kuramoto's order parameter exhibits superslow relaxation, i.e., 1/ln t as time t increases. Moreover, the statistics on both the transient time T for the system to reach a fixed point and the absolute value of Kuramoto's order parameter at t = T are also presented together with their distribution densities over many realizations of the coupling parameters.
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Affiliation(s)
- H Daido
- Department of Mathematical Sciences, Graduate School of Engineering, Osaka Prefecture University, Sakai 599-8531, Japan
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Daido H, Suzuki Y, Kawachi T, Fukuda T, Nakagiri T, Kaku M, Kubodera S. Demonstration of partially transparent thick metallic sodium in the vacuum ultraviolet spectral range. Opt Express 2013; 21:28182-28188. [PMID: 24514330 DOI: 10.1364/oe.21.028182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We describe the direct measurement of actual transmittance of sodium samples with thickness of a 2 mm and 3 mm in a spectral range >115 nm, resulting in >50% transmittance of 3 mm thick solid and liquid sodium samples including transmission of a pair of the windows at the wavelength of 120 nm, giving an extinction coefficient of ~10(-6) to ~10(-7) which represents the sodium with a few cm thickness to be partially transparent for this wavelength. To confirm the measurement, we perform simple imaging experiments by the ultra-violet light passing through a 8 mm-thick sodium sample to illuminate a mesh as an object, resulting in obtaining a clear image.
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Abstract
For many years, laser-driven ion acceleration, mainly proton acceleration, has been proposed and a number of proof-of-principle experiments have been carried out with lasers whose pulse duration was in the nanosecond range. In the 1990s, ion acceleration in a relativistic plasma was demonstrated with ultra-short pulse lasers based on the chirped pulse amplification technique which can provide not only picosecond or femtosecond laser pulse duration, but simultaneously ultra-high peak power of terawatt to petawatt levels. Starting from the year 2000, several groups demonstrated low transverse emittance, tens of MeV proton beams with a conversion efficiency of up to several percent. The laser-accelerated particle beams have a duration of the order of a few picoseconds at the source, an ultra-high peak current and a broad energy spectrum, which make them suitable for many, including several unique, applications. This paper reviews, firstly, the historical background including the early laser-matter interaction studies on energetic ion acceleration relevant to inertial confinement fusion. Secondly, we describe several implemented and proposed mechanisms of proton and/or ion acceleration driven by ultra-short high-intensity lasers. We pay special attention to relatively simple models of several acceleration regimes. The models connect the laser, plasma and proton/ion beam parameters, predicting important features, such as energy spectral shape, optimum conditions and scalings under these conditions for maximum ion energy, conversion efficiency, etc. The models also suggest possible ways to manipulate the proton/ion beams by tailoring the target and irradiation conditions. Thirdly, we review experimental results on proton/ion acceleration, starting with the description of driving lasers. We list experimental results and show general trends of parameter dependences and compare them with the theoretical predictions and simulations. The fourth topic includes a review of scientific, industrial and medical applications of laser-driven proton or ion sources, some of which have already been established, while the others are yet to be demonstrated. In most applications, the laser-driven ion sources are complementary to the conventional accelerators, exhibiting significantly different properties. Finally, we summarize the paper.
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Affiliation(s)
- Hiroyuki Daido
- Applied Laser Technology Institute, Tsuruga Head Office, Japan Atomic Energy Agency, Kizaki, Tsuruga-shi, Fukui-ken 914-8585, Japan.
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6
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Pirozhkov AS, Kando M, Esirkepov TZ, Gallegos P, Ahmed H, Ragozin EN, Faenov AY, Pikuz TA, Kawachi T, Sagisaka A, Koga JK, Coury M, Green J, Foster P, Brenner C, Dromey B, Symes DR, Mori M, Kawase K, Kameshima T, Fukuda Y, Chen L, Daito I, Ogura K, Hayashi Y, Kotaki H, Kiriyama H, Okada H, Nishimori N, Imazono T, Kondo K, Kimura T, Tajima T, Daido H, Rajeev P, McKenna P, Borghesi M, Neely D, Kato Y, Bulanov SV. Soft-x-ray harmonic comb from relativistic electron spikes. Phys Rev Lett 2012; 108:135004. [PMID: 22540709 DOI: 10.1103/physrevlett.108.135004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2011] [Indexed: 05/31/2023]
Abstract
We demonstrate a new high-order harmonic generation mechanism reaching the "water window" spectral region in experiments with multiterawatt femtosecond lasers irradiating gas jets. A few hundred harmonic orders are resolved, giving μJ/sr pulses. Harmonics are collectively emitted by an oscillating electron spike formed at the joint of the boundaries of a cavity and bow wave created by a relativistically self-focusing laser in underdense plasma. The spike sharpness and stability are explained by catastrophe theory. The mechanism is corroborated by particle-in-cell simulations.
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Affiliation(s)
- A S Pirozhkov
- Advanced Beam Technology Division, JAEA, 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215, Japan
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7
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Okada H, Tanaka M, Kiriyama H, Nakai Y, Ochi Y, Sugiyama A, Daido H, Kimura T, Yanagitani T, Yagi H, Meichin N. Laser ceramic materials for subpicosecond solid-state lasers using Nd3+-doped mixed scandium garnets. Opt Lett 2010; 35:3048-3050. [PMID: 20847774 DOI: 10.1364/ol.35.003048] [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: 05/29/2023]
Abstract
We have successfully developed and demonstrated broadband emission Nd-doped mixed scandium garnets based on laser ceramic technology. The inhomogeneous broadening of Nd(3+) fluorescence lines results in a bandwidth above 5 nm that is significantly broader than that for Nd:YAG and enables subpicosecond mode-locked pulse durations. We have also found the emission cross section of 7.8 × 10(-20) cm(2) to be adequate for efficient energy extraction and thermal conductivity of 4.7 W/mK from these new Nd-doped laser ceramics. The new laser ceramics are good candidates for laser host material in a diode-pumped subpicosecond laser system with high efficiency and high repetition rate.
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Affiliation(s)
- Hajime Okada
- Advanced Photon Research Center, Japan Atomic Energy Agency, 8-1-7 Kizugawa-City, Kyoto 619-0215, Japan.
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Kiriyama H, Mori M, Nakai Y, Shimomura T, Sasao H, Tanoue M, Kanazawa S, Wakai D, Sasao F, Okada H, Daito I, Suzuki M, Kondo S, Kondo K, Sugiyama A, Bolton PR, Yokoyama A, Daido H, Kawanishi S, Kimura T, Tajima T. High temporal and spatial quality petawatt-class Ti:sapphire chirped-pulse amplification laser system. Opt Lett 2010; 35:1497-1499. [PMID: 20479787 DOI: 10.1364/ol.35.001497] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Optical parametric chirped-pulse amplification (OPCPA) operation with low gain by seeding with high-energy, clean pulses is shown to significantly improve the contrast to better than 10(-10) to 10(-11) in a high-intensity Ti:sapphire laser system that is based on chirped-pulse amplification. In addition to the high-contrast broadband, high-energy output from the final amplifier is achieved with a flat-topped spatial profile of filling factor near 77%. This is the result of pump beam spatial profile homogenization with diffractive optical elements. Final pulse energies exceed 30 J, indicating capability for reaching peak powers in excess of 500 TW.
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Affiliation(s)
- Hiromitsu Kiriyama
- Kansai Photon Science Institute and Photo-Medical Research Center, Japan Atomic Energy Agency,8-1-7 Umemidai, Kizugawa-city, Kyoto 619-0215, Japan.
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9
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Kiriyama H, Mori M, Nakai Y, Shimomura T, Sasao H, Tanaka M, Ochi Y, Tanoue M, Okada H, Kondo S, Kanazawa S, Sagisaka A, Daito I, Wakai D, Sasao F, Suzuki M, Kotakai H, Kondo K, Sugiyama A, Bulanov S, Bolton PR, Daido H, Kawanishi S, Collier JL, Hernandez-Gomez C, Hooker CJ, Ertel K, Kimura T, Tajima T. High-spatiotemporal-quality petawatt-class laser system. Appl Opt 2010; 49:2105-2115. [PMID: 20390013 DOI: 10.1364/ao.49.002105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We have developed a femtosecond high-intensity laser system that combines both Ti:sapphire chirped-pulse amplification (CPA) and optical parametric CPA (OPCPA) techniques and produces more than 30 J broadband output energy, indicating the potential for achieving peak powers in excess of 500 TW. With a cleaned high-energy seeded OPCPA preamplifier as a front end in the system, for the compressed pulse without pumping the final amplifier, we found that the temporal contrast in this system exceeds 10(10) on the subnanosecond time scales, and is near 10(12) on the nanosecond time scale prior to the peak of the main femtosecond pulse. Using diffractive optical elements for beam homogenization of a 100 J level high-energy Nd:glass green pump laser in a Ti:sapphire final amplifier, we have successfully generated broadband high-energy output with a near-perfect top-hat-like intensity distribution.
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Affiliation(s)
- Hiromitsu Kiriyama
- Advanced Photon Research Center , Japan Atomic Energy Agency, 8-1-7 Umemidai, Kizugawa-city, Kyoto, 619-0215, Japan.
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10
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Kando M, Pirozhkov AS, Kawase K, Esirkepov TZ, Fukuda Y, Kiriyama H, Okada H, Daito I, Kameshima T, Hayashi Y, Kotaki H, Mori M, Koga JK, Daido H, Faenov AY, Pikuz T, Ma J, Chen LM, Ragozin EN, Kawachi T, Kato Y, Tajima T, Bulanov SV. Enhancement of photon number reflected by the relativistic flying mirror. Phys Rev Lett 2009; 103:235003. [PMID: 20366154 DOI: 10.1103/physrevlett.103.235003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2009] [Revised: 08/30/2009] [Indexed: 05/29/2023]
Abstract
Laser light reflection by a relativistically moving electron density modulation (flying mirror) in a wake wave generated in a plasma by a high intensity laser pulse is investigated experimentally. A counterpropagating laser pulse is reflected and upshifted in frequency with a multiplication factor of 37-66, corresponding to the extreme ultraviolet wavelength. The demonstrated flying mirror reflectivity (from 3 x 10(-6) to 2 x 10(-5), and from 1.3 x 10(-4) to 0.6 x 10(-3), for the photon number and pulse energy, respectively) is close to the theoretical estimate for the parameters of the experiment.
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Affiliation(s)
- M Kando
- Advanced Photon Research Center, JAEA, 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215, Japan
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11
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Pikuz TA, Faenov AY, Gasilov SV, Skobelev IY, Fukuda Y, Kando M, Kotaki H, Homma T, Kawase K, Hayashi Y, Kawachi T, Daido H, Kato Y, Bulanov SV. Propagation-based phase-contrast enhancement of nanostructure images using a debris-free femtosecond-laser-driven cluster-based plasma soft x-ray source and an LiF crystal detector. Appl Opt 2009; 48:6271-6276. [PMID: 19904327 DOI: 10.1364/ao.48.006271] [Citation(s) in RCA: 2] [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
We demonstrate in-line phase-contrast imaging of nanothickness foils by using a relatively large, polychromatic, debris-free femtosecond-laser-driven cluster-based plasma soft x-ray source, and a high-resolution, large dynamic range LiF crystal detector. The spatial coherence length of radiation in our setup reached a value of 5 microm on the sample plane, which is enough to observe phase-contrast enhancement in the images registered by the detector placed only a few hundred micrometers behind the object. We have developed a tabletop soft x-ray emission source, which emits radiation within a 4pi sr solid angle, and which allows one to obtain contact and propagation-based phase-contrast imaging of nanostructures with 700 nm spatial resolutions. This advance could be of utility for metrology applications.
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Affiliation(s)
- Tatiana A Pikuz
- Kansai Photon Science Institute (KPSI), Japan Atomic Energy Agency (JAEA), Kizugawa-shi, Kyoto, Japan
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12
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Kotaki H, Daito I, Kando M, Hayashi Y, Kawase K, Kameshima T, Fukuda Y, Homma T, Ma J, Chen LM, Esirkepov TZ, Pirozhkov AS, Koga JK, Faenov A, Pikuz T, Kiriyama H, Okada H, Shimomura T, Nakai Y, Tanoue M, Sasao H, Wakai D, Matsuura H, Kondo S, Kanazawa S, Sugiyama A, Daido H, Bulanov SV. Electron optical injection with head-on and countercrossing colliding laser pulses. Phys Rev Lett 2009; 103:194803. [PMID: 20365929 DOI: 10.1103/physrevlett.103.194803] [Citation(s) in RCA: 2] [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] [Received: 10/31/2008] [Indexed: 05/29/2023]
Abstract
A high stability electron bunch is generated by laser wakefield acceleration with the help of a colliding laser pulse. The wakefield is generated by a laser pulse; the second laser pulse collides with the first pulse at 180 degrees and at 135 degrees realizing optical injection of an electron bunch. The electron bunch has high stability and high reproducibility compared with single pulse electron generation. In the case of 180 degrees collision, special measures have been taken to prevent damage. In the case of 135 degrees collision, since the second pulse is countercrossing, it cannot damage the laser system.
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Affiliation(s)
- H Kotaki
- Advanced Photon Research Center, Japan Atomic Energy Agency, Kizugawa, Kyoto, Japan
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Gasilov SV, Faenov AY, Pikuz TA, Fukuda Y, Kando M, Kawachi T, Skobelev IY, Daido H, Kato Y, Bulanov SV. Wide-field-of-view phase-contrast imaging of nanostructures with a comparatively large polychromatic soft x-ray plasma source. Opt Lett 2009; 34:3268-3270. [PMID: 19881563 DOI: 10.1364/ol.34.003268] [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
Polychromatic soft x-ray plasma sources were not previously considered to be among the sources suitable for the propagation based phase contrast imaging because of their comparatively large emission-zone size. In the current work a scheme based on the combination of soft x-ray emission of multicharged ions, generated by the interaction of femtosecond laser pulses with an ultrasonic jet of gas clusters, and an LiF crystal detector was used to obtain phase-enhanced high-resolution images of micro- and nanoscale objects in a wide field of view.
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Affiliation(s)
- S V Gasilov
- Joint Institute for High Temperatures of Russian Academy of Sciences, Izhorskaja Street 13/19, Moscow, Russia.
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14
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Fukuda Y, Faenov AY, Tampo M, Pikuz TA, Nakamura T, Kando M, Hayashi Y, Yogo A, Sakaki H, Kameshima T, Pirozhkov AS, Ogura K, Mori M, Esirkepov TZ, Koga J, Boldarev AS, Gasilov VA, Magunov AI, Yamauchi T, Kodama R, Bolton PR, Kato Y, Tajima T, Daido H, Bulanov SV. Energy increase in multi-MeV ion acceleration in the interaction of a short pulse laser with a cluster-gas target. Phys Rev Lett 2009; 103:165002. [PMID: 19905702 DOI: 10.1103/physrevlett.103.165002] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2009] [Indexed: 05/28/2023]
Abstract
An approach for accelerating ions, with the use of a cluster-gas target and an ultrashort pulse laser of 150-mJ energy and 40-fs duration, is presented. Ions with energy 10-20 MeV per nucleon having a small divergence (full angle) of 3.4 degrees are generated in the forward direction, corresponding to approximately tenfold increase in the ion energies compared to previous experiments using solid targets. It is inferred from a particle-in-cell simulation that the high energy ions are generated at the rear side of the target due to the formation of a strong dipole vortex structure in subcritical density plasmas.
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Affiliation(s)
- Y Fukuda
- Kansai Photon Science Institute and Photo-Medical Research Center, JAEA, Kyoto, 615-0215 Japan
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15
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Choi IW, Kim CM, Sung JH, Yu TJ, Lee SK, Kim IJ, Jin YY, Jeong TM, Hafz N, Pae KH, Noh YC, Ko DK, Yogo A, Pirozhkov AS, Ogura K, Orimo S, Sagisaka A, Nishiuchi M, Daito I, Oishi Y, Iwashita Y, Nakamura S, Nemoto K, Noda A, Daido H, Lee J. Ion spectrometer composed of time-of-flight and Thomson parabola spectrometers for simultaneous characterization of laser-driven ions. Rev Sci Instrum 2009; 80:053302. [PMID: 19485501 DOI: 10.1063/1.3131628] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
An ion spectrometer, composed of a time-of-flight spectrometer (TOFS) and a Thomson parabola spectrometer (TPS), has been developed to measure energy spectra and to analyze species of laser-driven ions. Two spectrometers can be operated simultaneously, thereby facilitate to compare the independently measured data and to combine advantages of each spectrometer. Real-time and shot-to-shot characterizations have been possible with the TOFS, and species of ions can be analyzed with the TPS. The two spectrometers show very good agreement of maximum proton energy even for a single laser shot. The composite ion spectrometer can provide two complementary spectra measured by TOFS with a large solid angle and TPS with a small one for the same ion source, which are useful to estimate precise total ion number and to investigate fine structure of energy spectrum at high energy depending on the detection position and solid angle. Advantage and comparison to other online measurement system, such as the TPS equipped with microchannel plate, are discussed in terms of overlay of ion species, high-repetition rate operation, detection solid angle, and detector characteristics of imaging plate.
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Affiliation(s)
- I W Choi
- Advanced Photonics Research Institute and Center for Femto-Atto Science and Technology, GIST, Gwangju 500-712, Republic of Korea.
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16
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Kiriyama H, Mori M, Nakai Y, Shimomura T, Tanoue M, Akutsu A, Kondo S, Kanazawa S, Okada H, Motomura T, Daido H, Kimura T, Tajima T. High-contrast, high-intensity laser pulse generation using a nonlinear preamplifier in a Ti:sapphire laser system. Opt Lett 2008; 33:645-647. [PMID: 18382504 DOI: 10.1364/ol.33.000645] [Citation(s) in RCA: 2] [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: 05/26/2023]
Abstract
We report a high-contrast, high-intensity Ti:sapphire chirped-pulse amplification system that incorporates a nonlinear preamplifier based on optical parametric chirped-pulse amplification (OPCPA). By cooling the Ti:sapphire crystal in the final amplifier down to 77 K, the chirped-pulses are amplified to 2.9 J at a 10 Hz repetition rate without a thermal lensing effect. Pulse compression down to 19 fs duration obtained after amplification indicates a peak power of 80 TW. With the OPCPA, the temporal contrast is significantly improved to better than 7x10(-9) in a few picoseconds interval prior to the main laser pulse.
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Affiliation(s)
- Hiromitsu Kiriyama
- Advanced Photon Research Center, Japan Atomic Energy Agency, Kizugawa-city, Kyoto, Japan.
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17
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Murakami M, Hishikawa Y, Miyajima S, Okazaki Y, Sutherland KL, Abe M, Bulanov SV, Daido H, Esirkepov TZ, Koga J, Yamagiwa M, Tajima T, Bulanov SV, Daido H. Radiotherapy using a laser proton accelerator. ACTA ACUST UNITED AC 2008. [DOI: 10.1063/1.2958203] [Citation(s) in RCA: 22] [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: 11/14/2022]
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18
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Yogo A, Daido H, Bulanov SV, Nemoto K, Oishi Y, Nayuki T, Fujii T, Ogura K, Orimo S, Sagisaka A, Ma JL, Esirkepov TZ, Mori M, Nishiuchi M, Pirozhkov AS, Nakamura S, Noda A, Nagatomo H, Kimura T, Tajima T. Laser ion acceleration via control of the near-critical density target. Phys Rev E Stat Nonlin Soft Matter Phys 2008; 77:016401. [PMID: 18351938 DOI: 10.1103/physreve.77.016401] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2007] [Indexed: 05/26/2023]
Abstract
Duration-controlled amplified spontaneous emission with an intensity of 10(13) W/cm(2) is used to convert a 7.5-microm -thick polyimide foil into a near-critical plasma, in which the p -polarized, 45-fs , 10(19) -Wcm (2) laser pulse generates 3.8-MeV protons, emitted at some angle between the target normal and the laser propagation direction of 45 degrees . Particle-in-cell simulations reveal that the efficient proton acceleration is due to the generation of a quasistatic magnetic field on the target rear side with magnetic pressure inducing and sustaining a charge separation electrostatic field.
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Affiliation(s)
- A Yogo
- Kansai Photon Science Institute, Japan Atomic Energy Agency (JAEA), Kyoto 619-0215, Japan
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19
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Kando M, Fukuda Y, Pirozhkov AS, Ma J, Daito I, Chen LM, Esirkepov TZ, Ogura K, Homma T, Hayashi Y, Kotaki H, Sagisaka A, Mori M, Koga JK, Daido H, Bulanov SV, Kimura T, Kato Y, Tajima T. Demonstration of laser-frequency upshift by electron-density modulations in a plasma wakefield. Phys Rev Lett 2007; 99:135001. [PMID: 17930598 DOI: 10.1103/physrevlett.99.135001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2007] [Indexed: 05/25/2023]
Abstract
In a plasma wake wave generated by a high power laser, modulations of the electron density take the shape of paraboloidal dense shells, moving almost at the speed of light. A counterpropagating laser pulse is partially reflected from the shells, acting as relativistic flying mirrors, producing a time-compressed frequency-multiplied pulse due to the double Doppler effect. The counterpropagating laser pulse reflection from the plasma wake wave accompanied by its frequency multiplication (with a factor from 50 to 114) was detected in our experiment.
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Affiliation(s)
- M Kando
- Advanced Photon Research Center, JAEA, 8-1 Umemidai, Kizugawa, Kyoto 619-0215, Japan
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20
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Kiriyama H, Mori M, Nakai Y, Yamamoto Y, Tanoue M, Akutsu A, Shimomura T, Kondo S, Kanazawa S, Daido H, Kimura T, Miyanaga N. High-energy, high-contrast, multiterawatt laser pulses by optical parametric chirped-pulse amplification. Opt Lett 2007; 32:2315-7. [PMID: 17700770 DOI: 10.1364/ol.32.002315] [Citation(s) in RCA: 2] [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: 05/16/2023]
Abstract
We describe a compact, reliable, high-power, and high-contrast noncollinear optical parametric chirped-pulse amplifier system. With a broadband Ti:sapphire oscillator and grating-based stretching and compression, the chirped pulses are amplified from 0.1 nJ to 122 mJ in type I beta-barium borate optical parametric chirped-pulse amplifiers with a total gain of over 10(9) at 10 Hz repetition rate. Pulse compression down to 19-fs duration achieved after amplification indicates a peak power of 3.2 TW at an average power of 0.62 W. The prepulse contrast is measured to be less than 10(-8) on picosecond time scales.
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Affiliation(s)
- Hiromitsu Kiriyama
- Advanced Photon Research Center, Japan Atomic Energy Agency, 8-1 Umemidai, Kizugawa-city, Kyoto 619-0215, Japan.
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21
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Hayashi Y, Fukumi A, Matsukado K, Mori M, Kotaki H, Kando M, Chen LM, Daito I, Kondo S, Kanazawa S, Yamazaki A, Ogura K, Nishiuchi M, Kado M, Sagisaka A, Nakamura S, Li Z, Orimo S, Homma T, Daido H. Estimation of photon dose generated by a short pulse high power laser. Radiat Prot Dosimetry 2006; 121:99-107. [PMID: 16410288 DOI: 10.1093/rpd/nci383] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The authors obtain a new equation to estimate the forward component of a photon dose generated through the interaction between a target and a short pulse high power laser. As the equation is quite simple, it is useful for calculating the photon dose. The equation shows that the photon dose is proportional to the electron temperature in the range>3 MeV and proportional to the square of the electron temperature in the range<3 MeV. The dose estimated with this method is roughly consistent with the result of Monte Carlo simulation. With some assumptions and corrections, it can reproduce experimental results obtained and the dose result calculated at other laboratories.
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Affiliation(s)
- Y Hayashi
- Quantum Beam Science Directorate, Japan Atomic Energy Agency, 8-1 Umemidai, Kizu-cho, Souraku-gun, Kyoto 619-0215, Japan.
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22
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Matsukado K, Esirkepov T, Kinoshita K, Daido H, Utsumi T, Li Z, Fukumi A, Hayashi Y, Orimo S, Nishiuchi M, Bulanov SV, Tajima T, Noda A, Iwashita Y, Shirai T, Takeuchi T, Nakamura S, Yamazaki A, Ikegami M, Mihara T, Morita A, Uesaka M, Yoshii K, Watanabe T, Hosokai T, Zhidkov A, Ogata A, Wada Y, Kubota T. Energetic protons from a few-micron metallic foil evaporated by an intense laser pulse. Phys Rev Lett 2003; 91:215001. [PMID: 14683311 DOI: 10.1103/physrevlett.91.215001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2003] [Indexed: 05/24/2023]
Abstract
With detailed experimental studies and hydrodynamics and particle-in-cell simulations we investigate the role of the prepulse in laser proton acceleration. The prepulse or pedestal (amplified spontaneous emission) can completely evaporate the irradiated region of a sufficiently thin foil; therefore, the main part of the laser pulse interacts with an underdense plasma. The multiparametric particle-in-cell simulations demonstrate that the main pulse generates the quasistatic magnetic field, which in its turn produces the long-lived charge separation electrostatic field, accelerating the ions.
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Affiliation(s)
- K Matsukado
- National Institute of Radiological Science, Japan
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23
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Tai RZ, Namikawa K, Kishimoto M, Tanaka M, Sukegawa K, Hasegawa N, Kawachi T, Kado M, Lu P, Nagashima K, Daido H, Maruyama H, Sawada A, Ando M, Kato Y. Picosecond snapshot of the speckles from ferroelectric BaTiO3 by means of x-ray lasers. Phys Rev Lett 2002; 89:257602. [PMID: 12484921 DOI: 10.1103/physrevlett.89.257602] [Citation(s) in RCA: 2] [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] [Received: 06/13/2002] [Indexed: 05/24/2023]
Abstract
A picosecond x-ray laser speckle has been conducted to study the dynamics of a disordered surface domain structure (BaTiO3 with 90 degrees c/a domains) as a function of temperature for the first time. The transient surface structures induced by ferroelectric domains decrease as temperature increases towards the Curie temperature T(c) and completely disappear above T(c). The dramatic change of the spatial configuration of the c/a domains was observed to occur from a temperature 2 degrees C below T(c), near which the average correlated domain size at equilibrium decreases as (T(c)-T)(0.37+/-0.02).
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Affiliation(s)
- R Z Tai
- Advanced Photon Research Center, Japan Atomic Energy Research Institute, 8-1, Umemidai, Kizu, Kyoto, 619-0215, Japan
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24
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Zhidkov A, Uesaka M, Sasaki A, Daido H. Ion acceleration in a solitary wave by an intense picosecond laser pulse. Phys Rev Lett 2002; 89:215002. [PMID: 12443420 DOI: 10.1103/physrevlett.89.215002] [Citation(s) in RCA: 3] [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] [Received: 01/15/2002] [Indexed: 05/24/2023]
Abstract
Acceleration of ions in a solitary wave produced by shock-wave decay in a plasma slab irradiated by an intense picosecond laser pulse is studied via particle-in-cell simulation. Instead of exponential distribution as in known mechanisms of ion acceleration from the target surface, these ions accelerated forwardly form a bunch with relatively low energy spread. The bunch is shown to be a solitary wave moving over expanding plasma; its velocity can exceed the maximal velocity of ions accelerated forward from the rear side of the target.
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Affiliation(s)
- A Zhidkov
- Nuclear Engineering Research Laboratory, University of Tokyo, 22-2 Shirane-shirakata, Tokai, Naka, Ibaraki, 319-1188 Japan
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25
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Lu P, Kawachi T, Kishimoto M, Sukegawa K, Tanaka M, Hasegawa N, Suzuki M, Tai R, Kado M, Nagashima K, Daido H, Kato Y, Fiedorowicz H, Bartnik A. Demonstration of a transient-gain nickel-like xenon-ion x-ray laser. Opt Lett 2002; 27:1911-1913. [PMID: 18033399 DOI: 10.1364/ol.27.001911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We demonstrate a high-gain nickel-like xenon-ion x-ray laser, using a picosecond-laser-irradiated gas-puff target. The elongated x-ray laser plasma column was produced by irradiation of the gas-puff target with line-focused double picosecond laser pulses with a total energy of 18 J in a traveling-wave excitation scheme. Strong lasing at 9.98 nm was observed, and a high gain coefficient of 17.4 cm(-1) was measured on the transient collisionally excited 4d-4p , J=0-1 transition for nickel-like xenon ions with target lengths as great as 0.45 cm. A weak nickel-like lasing line at a shorter wavelength of 9.64 nm was also observed, with a gain coefficient of 5.9 cm(-1) .
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26
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Esirkepov TZ, Bulanov SV, Nishihara K, Tajima T, Pegoraro F, Khoroshkov VS, Mima K, Daido H, Kato Y, Kitagawa Y, Nagai K, Sakabe S. Proposed double-layer target for the generation of high-quality laser-accelerated ion beams. Phys Rev Lett 2002; 89:175003. [PMID: 12398678 DOI: 10.1103/physrevlett.89.175003] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2002] [Indexed: 05/24/2023]
Abstract
In order to achieve a high-quality, i.e., monoenergetic, intense ion beam, we propose the use of a double-layer target. The first layer, at the target front, consists of high-Z atoms, while the second (rear) layer is a thin coating of low-Z atoms. The generation of high-quality proton beams from the double-layer target, irradiated by an ultraintense laser pulse, is demonstrated with three-dimensional particle-in-cell simulations.
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Affiliation(s)
- T Zh Esirkepov
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
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27
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Abstract
Living creatures are under control of biological clocks with various periods near those of environmental cycles. Examples are circadian (about a day) and circannual (about a year) clocks. We may ask why their periods are not precisely one day or one year because adaptation to the environment should then be easier. Here, introducing a model of competitive population dynamics of biological species with clock dynamics incorporated, it is shown that periods equal or close to that of the environment do not always guarantee overwhelming superiority and can even lead to extinction. This result may provide a clue to solve the mystery.
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Affiliation(s)
- H Daido
- Department of Physics, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
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28
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Hanamoto T, Miura A, Daido H, Yamamoto M, Takeda N, Yasuda K. [Hypophosphatemic rickets with normoalkaliphosphatemia, ossification of the posterior longitudinal ligament and yellow ligament]. Nihon Naika Gakkai Zasshi 2001; 90:1073-5. [PMID: 11460372 DOI: 10.2169/naika.90.1073] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- T Hanamoto
- Third Department of Internal Medicine, Gifu University School of Medicine, Gifu
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29
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Abstract
Angiotensin-II (A-II) induces proliferation of zona glomerulosa cells and stimulates expression of cytochrome P-450 aldosterone synthase. The genes activated during this adrenal remodeling are not well defined. To clarify this mechanism, we sought to identify the genes whose expression is stimulated by A-II in the H295R cell line. Using a subtractive hybridization technique, we identified one clone whose expression was stimulated by A-II. The sequence of this gene was homologous to the human interferon-inducible genes, 9-27, 1-8D and 1-8U. The 5' portion of the gene was identical to the 1-8D gene product and the 3' was identical to the 9-27 gene product, but the existence of a transcript was not demonstrated by RT-PCR. The expression of these three genes was stimulated by A-II, with the 9-27 gene being most abundant. Potassium and forskolin also stimulated the expression of the 9-27 gene in the H295R cells, but not as effectively as did A-II or interferon-gamma.
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Affiliation(s)
- H Daido
- Division of Endocrinology, University of Missouri, Columbia, MO 65212, USA
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30
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Ogino C, Negi Y, Daido H, Kanemasu M, Kondo A, Kuroda S, Tanizawa K, Shimizu N, Fukuda H. Identification of novel membrane-bound phospholipase D from Streptoverticillium cinnamoneum, possessing only hydrolytic activity. Biochim Biophys Acta 2001; 1530:23-31. [PMID: 11341956 DOI: 10.1016/s1388-1981(00)00163-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
A membrane-bound phospholipase D (PLD) has been identified and isolated in a soluble form from an actinomycete, Streptoverticillium cinnamoneum. The enzyme has a monomeric structure with a molecular size of about 37 kDa, being the smallest among the enzymes so far reported. The enzyme catalyzes the hydrolysis of phosphatidylethanolamine and phosphatidylserine as preferred substrates, but not the transphosphatidylation reaction of their phospholipid groups to ethanol. Together with the absence of immunochemical cross-reactivity, these enzymatic properties demonstrate that the membrane-bound enzyme is distinct from the extracellular enzyme recently characterized and cloned from the same bacterial strain [C. Ogino et al., J. Biochem. 125 (1999) 263-269] and is therefore regarded as a novel prokaryotic PLD.
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Affiliation(s)
- C Ogino
- Division of Molecular Science, Graduate School of Science and Technology, Kobe University, Japan
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31
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Morita H, Daido H, Suwa T, Mune T, Yoshino K, Isomura Y, Tanahashi T, Takeda N, Ishizuka T, Yasuda K. Overt congestive heart failure with mitral and aortic regurgitation due to antiphospholipid syndrome in a patient with systemic lupus erythematosus. Intern Med 2000; 39:506-11. [PMID: 10852175 DOI: 10.2169/internalmedicine.39.506] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 51-year-old woman with overt congestive heart failure with pleural and pericardial effusion was treated with furosemide and nifedipine, leading to improvement in her condition and a decrease in effusions. An echocardiography demonstrated mitral and aortic regurgitation with mitral valve prolapse, which caused the congestive heart failure. Since leukocytopenia and lymphocytopenia with arthralgia could be observed, serological investigations were performed. She was diagnosed as having systemic lupus erythematosus (SLE) with antiphospholipid syndrome, and started on a treatment of prednisolone and aspirin. Based on the treatment, the pleural and pericardial effusion went into complete remission, indicating that the serositis related to SLE had overlapped the heart failure. Since there was no evidence of any other diseases that could be responsible for the valvular lesions, we concluded that they were due to antiphospholipid syndrome. The administration of prednisolone had no significant effect on valvular morphology or function as demonstrated by echocardiography. When patients with valvular disease are seen, a valvulopathy related to antiphospholipid syndrome should be considered as part of the differential diagnosis.
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Affiliation(s)
- H Morita
- Department of General Medicine, Gifu University School of Medicine
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32
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Abstract
The mechanism(s) of the "aldosterone turn-off phenomenon", hypoaldosteronemia following chronic ACTH administration, remains unclear. Our previous observation that antioxidants prevented turn-off prompted us to evaluate the chronic effect of ACTH on the enzymatic antioxidant system as well as P450aldo activity and expression of CYP11B2 in adrenal zona glomerulosa. Male Wistar rats were administered ACTH-Z for 5 days with or without antioxidants, vitamin E or DMSO. Adrenal capsules were prepared for P450aldo activity measurement and mRNA content determination by competitive RT-PCR, and immunoreactivity of Mn-SOD in whole adrenals was evaluated. ACTH decreased the P450aldo activity and mRNA level of CYP11B2 in adrenal capsules, while co-administration of vitamin E or DMSO partially blocked this inhibition. ACTH increased Mn-SOD mRNA and immunoreactivity but decreased GPx mRNA. These results suggest that prolonged ACTH treatment increases oxidative stress in the zona glomerulosa and an imbalance in the ratio of Mn-SOD to GPx, possibly via corticosterone overproduction in the zona fasciculata, resulting in the downregulation of CYP11B2. Vitamin E and DMSO might thus protect CYP11B2 expression through their antioxidant actions.
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Affiliation(s)
- T Suwa
- Third Department of Internal Medicine, Gifu University School of Medicine, Japan
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33
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Daido H. Algebraic relaxation of an order parameter in randomly coupled limit-cycle oscillators. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 2000; 61:2145-2147. [PMID: 11046516 DOI: 10.1103/physreve.61.2145] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/1998] [Indexed: 05/23/2023]
Abstract
In their recent paper [Phys. Rev. E 58, 1789 (1998)], Stiller and Radons (SR) study, following our earlier work [Phys. Rev. Lett. 68, 1073 (1992)], the behavior of globally and randomly coupled phase oscillators with distributed intrinsic frequencies. They claim that their simulation results do not confirm the power-law behavior of an order parameter found numerically by the author, attributing its cause to the poor precision of the author's integration scheme. Here demonstrated is that the power law survives even for a scheme better than SR's, provided that finite-size effects are properly taken into account, as was done in our previous work.
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Affiliation(s)
- H Daido
- Department of Physics, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan
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34
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Klisnick A, Carillon A, Jamelot G, Jaegle P, Ros D, Zeitoun P, Albert F, Fourcade P, Kuba J, Miquel JL, Blanchot N, Wyart JF, Agostini P, Breger P, Garzella D, Mueller-Seelich H, Joyeux D, Phalippou D, Bechir E, Hubert S, De Lacheze-Murel G, Daido H. Demonstration of two-color transient pumping in Ni-like silver at 13.9 nm and 16.1 nm: new progress in applications of x-ray lasers. ACTA ACUST UNITED AC 1999. [DOI: 10.1117/12.366678] [Citation(s) in RCA: 3] [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: 11/14/2022]
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Daido H. Multi-branch entrainment and multi-peaked order-functions in a phase model of limit-cycle oscillators with uniform all-to-all coupling. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0305-4470/28/5/002] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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37
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Kmetik V, Fiedorowicz H, Andreev AA, Witte KJ, Daido H, Fujita H, Nakatsuka M, Yamanaka T. Reliable Stimulated Brillouin Scattering Compression of Nd:YAG Laser Pulses with Liquid Fluorocarbon for Long-Time Operation at 10 Hz. Appl Opt 1998; 37:7085-7090. [PMID: 18301529 DOI: 10.1364/ao.37.007085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Stokes pulses of high energy and high-average power were obtained by stimulated Brillouin scattering (SBS) compression of long Nd:YAG laser pulses. The SBS medium used in the single-cell compressor was liquid ultrafiltered Fluorinert FC-75 fluorocarbon. An output pulse duration of 0.9 ns and a peak-power enhancement by 1 order of magnitude were observed for 10-ns, 0.57-J input pulses at a 10-Hz repetition rate. The compressor internal SBS efficiency reached a value of eta(SBS) = 94% and the overall device efficiency a value of eta(dev) = 87%; both values are the highest reported so far to the best of our knowledge. The simple single-cell SBS geometry provided excellent energy and pointing stability of the Stokes pulse. Its temporal shape turned out to be somewhat less stable. The SBS process also partially improved the laser beam quality. The Stokes pulses proved to be capable of generating radiation in the extreme-ultraviolet and soft-x-ray regions over a period of two months without any significant output deterioration.
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38
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Yoshino K, Sarui H, Yamada K, Shibata T, Daido H, So T, Takuno Y, Ishizuka T, Yasuda K, Yoshimura M, Hara A. [Case of ectopic ACTH-producing small cell carcinoma of the lung: a reduction in tumor size after chemotherapy in spite of a marked rise in the plasma ACTH level]. Nihon Naika Gakkai Zasshi 1997; 86:684-6. [PMID: 9198663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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39
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40
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Daido H, Ninomiya S, Imani T, Kodama R, Takagi M, Kato Y, Murai K, Zhang J, You Y, Gu Y. Nickellike soft-x-ray lasing at the wavelengths between 14 and 7.9 nm. Opt Lett 1996; 21:958-960. [PMID: 19876217 DOI: 10.1364/ol.21.000958] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report what we believe is the first observation of clear soft-x-ray lasing in Ni-like Ag, Te, La, Ce, and Pr and also in Nd covering the spectral range 14.3-7.9 nm. A curved slab target was irradiated with quadruple 1.053-microm laser pulses. The pulse-to-pulse separation for the first three pulses was 400 ps, and that between the third and the fourth pulses was 1.6 ns. The pulse duration and irradiance on the target were 100 ps and ~7 x 10(13) W/cm(2), respectively. For all the targets the most intense lasing was observed at the fourth pump pulse.
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41
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Yuan G, Murai K, Daido H, Kodama R, Kato Y. Two-dimensional beam characteristics of triple-pulse pumping a Ne-like Ge soft-x-ray laser at 19.6 nm. Phys Rev A 1995; 52:4861-4866. [PMID: 9912827 DOI: 10.1103/physreva.52.4861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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42
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Kawachi T, Murai K, Yuan G, Ninomiya S, Kodama R, Daido H, Kato Y, Fujimoto T. Observation of polarization of the soft x-ray laser line in neonlike germanium ions. Phys Rev Lett 1995; 75:3826-3829. [PMID: 10059741 DOI: 10.1103/physrevlett.75.3826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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43
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Daido H, Kato Y, Murai K, Ninomiya S, Kodama R, Yuan G, Oshikane Y, Takagi M, Takabe H, Koike F. Efficient soft X-ray lasing at 6 to 8 nm with nickel-like lanthanide ions. Phys Rev Lett 1995; 75:1074-1077. [PMID: 10060199 DOI: 10.1103/physrevlett.75.1074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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44
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Daido H, Schulz MS, Murai K, Kodama R, Yuan G, Goto J, Tanaka KA, Kato Y, Nakai S, Shinohara K, Honda T, Kodama I, Iwasaki H, Yoshinobu T, Tsukamoto M, Niibe M, Fukuda Y, Neely D, Macphee A, Slark G. Subnanosecond In-Line Soft X-Ray Holography Using Germanium Laser in the 20 nm Wavelength Region. J Xray Sci Technol 1995; 5:105-120. [PMID: 21307481 DOI: 10.3233/xst-1995-5109] [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: 05/30/2023]
Abstract
Near- and far-field characteristics of a germanium soft x-ray laser at the wavelengths of 23.2-23.6 nm (J = 2-1 transitions) and 19.6 nm (J = 0-1 transition) are given for quantitative evaluation of the germanium laser for holographic applications. In-line Gabor holography of simple structured objects, such as thin opaque fibers and a standard electron microscope test specimen, is demonstrated. The holograms were recorded on PMMA (polymethyl methacrylate) photoresists and llford Q-plates. The holograms recorded on PMMA were retrieved with an atomic force microscope. The object image was reconstructed by numerical reconstruction with phase retrieval algorithm, resulting in a clear, ghost-free image with sharp edges which infer sub-μm resolution. Future directions for x-ray laser holography are briefly discussed.
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Affiliation(s)
- H Daido
- Instituie of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565, Japan
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Daido H, Kodama R, Murai K, Yuan G, Takagi M, Kato Y, Choi IW, Nam CH. Significant improvement in the efficiency and brightness of the J = 0-1 19.6-nm line of the germanium laser by use of double-pulse pumping. Opt Lett 1995; 20:61-63. [PMID: 19855797 DOI: 10.1364/ol.20.000061] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We describe significant improvement in the efficiency and brightness of the J = 0-1 19.6-nm line of the neonlike germanium laser. A curved slab target was irradiated by two laser pulses of 100-ps duration separated by 300 ps with a total energy of 200-300 J on target. Compared with that obtained by 1-ns single-pulse pumping with 1.1 kJ of energy, the J = 0-1 line has a 12 times higher peak intensity, with a smaller beam divergence of 2 mrad, corresponding to a factor-of-25 improvement in brightness.
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Kodama R, Neely D, Kato Y, Daido H, Murai K, Yuan G, MacPhee A, Lewis CL. Generation of small-divergence soft x-ray laser by plasma waveguiding with a curved target. Phys Rev Lett 1994; 73:3215-3218. [PMID: 10057320 DOI: 10.1103/physrevlett.73.3215] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Morikawa M, Daido H, Pongpobpibool S, Imanaka T. Construction of a new host-vector system in Arthrobacter sp. and cloning of the lipase gene. Appl Microbiol Biotechnol 1994; 42:300-3. [PMID: 7765770 DOI: 10.1007/bf00902732] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Arthrobacter sp. strain MIS38 was transformed with a shuttle vector containing the kanamycin resistant gene kan (derived from Tn5) by an electroporation method. This shuttle vector is from Brevibacterium lactofermentum and Escherichia coli, pULRS8. The following optimal condition of electroporation was determined. A square wave pulse of 1 kV/cm electric field strength for 0.5 ms duration yielded 3 x 10(5) transformants/micrograms plasmid DNA. The number of transformants increased with the amount of DNA over the range 0.01-5 micrograms. This host-vector system was then used successfully to clone and express a lipase gene from Arthrobacter sp. strain MIS38 into both Arthrobacter sp. MIS38 and E. coli JM109.
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Affiliation(s)
- M Morikawa
- Department of Biotechnology, Faculty of Engineering, Osaka University, Japan
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Daido H. Generic scaling at the onset of macroscopic mutual entrainment in limit-cycle oscillators with uniform all-to-all coupling. Phys Rev Lett 1994; 73:760-763. [PMID: 10057530 DOI: 10.1103/physrevlett.73.760] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
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Abstract
A biosurfactant termed arthrofactin produced by Arthrobacter species strain MIS38 was purified and chemically characterized as 3-hydroxydecanoyl-D-leucyl-D-asparagyl-D-threonyl-D- leucyl-D-leucyl-D-seryl-L-leucyl-D-seryl-L-isoleucyl-L-isoleucyl-L-as paragyl lactone. Surface activity of arthrofactin was examined, with surfactin as a control. Critical micelle concentration values of arthrofactin and surfactin were around 1.0 x 10(-5) M and 7.0 x 10(-5) M at 25 degrees C, respectively. Arthrofactin was found to be five to seven times more effective than surfactin. The minimum surface tension value of arthrofactin was 24 mN/m at a concentration higher than the critical micelle concentration. According to the oil displacement assay, arthrofactin was a better oil remover than synthetic surfactants, such as Triton X-100 and sodium dodecyl sulfate. Arthrofactin is one of the most effective lipopeptide biosurfactants.
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Affiliation(s)
- M Morikawa
- Department of Biotechnology, Osaka University, Japan
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