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Choi TK, Park J, Kim G, Jang H, Park SY, Sohn JH, Cho BI, Kim H, Kim KS, Nam I, Chun SH. Resonant X-ray emission spectroscopy using self-seeded hard X-ray pulses at PAL-XFEL. J Synchrotron Radiat 2023; 30:1038-1047. [PMID: 37738032 PMCID: PMC10624040 DOI: 10.1107/s1600577523007312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Accepted: 08/20/2023] [Indexed: 09/23/2023]
Abstract
Self-seeded hard X-ray pulses at PAL-XFEL were used to commission a resonant X-ray emission spectroscopy experiment with a von Hamos spectrometer. The self-seeded beam, generated through forward Bragg diffraction of the [202] peak in a 100 µm-thick diamond crystal, exhibited an average bandwidth of 0.54 eV at 11.223 keV. A coordinated scanning scheme of electron bunch energy, diamond crystal angle and silicon monochromator allowed us to map the Ir Lβ2 X-ray emission lines of IrO2 powder across the Ir L3-absorption edge, from 11.212 to 11.242 keV with an energy step of 0.3 eV. This work provides a reference for hard X-ray emission spectroscopy experiments utilizing self-seeded pulses with a narrow bandwidth, eventually applicable for pump-probe studies in solid-state and diluted systems.
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Affiliation(s)
- Tae-Kyu Choi
- XFEL Division, Pohang Accelerator Laboratory, POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Jaeku Park
- XFEL Division, Pohang Accelerator Laboratory, POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Gyujin Kim
- XFEL Division, Pohang Accelerator Laboratory, POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Hoyoung Jang
- XFEL Division, Pohang Accelerator Laboratory, POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea
- Photon Science Center, POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Sang-Youn Park
- XFEL Division, Pohang Accelerator Laboratory, POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Jang Hyeob Sohn
- Department of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Byoung Ick Cho
- Department of Physics and Photon Science, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
| | - Hyunjung Kim
- Department of Physics, Sogang University, Seoul 04107, Republic of Korea
| | - Kyung Sook Kim
- XFEL Division, Pohang Accelerator Laboratory, POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Inhyuk Nam
- XFEL Division, Pohang Accelerator Laboratory, POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Sae Hwan Chun
- XFEL Division, Pohang Accelerator Laboratory, POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea
- Photon Science Center, POSTECH, Pohang, Gyeongbuk 37673, Republic of Korea
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Cho MH, Kang T, Yang H, Kim G, Kwon SH, Moon KJ, Nam I, Min CK, Heo H, Kim C, Kang HS, Shim CH. Generation of time-synchronized two-color X-ray free-electron laser pulses using phase shifters. Sci Rep 2023; 13:13786. [PMID: 37612325 PMCID: PMC10447429 DOI: 10.1038/s41598-023-39322-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 07/23/2023] [Indexed: 08/25/2023] Open
Abstract
To optimize the intensity of X-ray free-electron lasers (XFELs), phase shifters, oriented in phase with the phases of the XFEL pulse and electron beam, are typically installed at undulator lines. Although a π-offset between the phases (i.e., an "out-of-phase" configuration) can suppress the XFEL intensity at resonant frequencies, it can also generate a side-band spectrum, which results in a two-color XFEL pulse; the dynamics of such a pulse can be described using the spontaneous radiation or low gain theory. This attributes of this two-color XFEL pulse can be amplified (log-scale amplification) through an undulator line with out-of-phase phase shifters. In this study, the features of two-color XFEL pulses were evaluated through theory, simulations and experiments performed at Pohang Accelerator Laboratory X-ray Free Electron Laser. The XFEL gain slope and energy separation between the two-color spectral peaks were consistent through theoretical expectation, and the results of simulation and experiment. The experimentally determined two-color XFEL pulse energy was 250 μJ at a photon energy of 12.38 keV with a separation of 60 eV.
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Affiliation(s)
- Myung-Hoon Cho
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea.
| | - Teyoun Kang
- Department of Physics and Earth Science, Korea Science Academy of KAIST, Busan, 47162, Korea
| | - Haeryong Yang
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Gyujin Kim
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Seong-Hoon Kwon
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Kook-Jin Moon
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Inhyuk Nam
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Chang-Ki Min
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Hoon Heo
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Changbum Kim
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Heung-Sik Kang
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Chi Hyun Shim
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Korea.
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Nam I, Eom I, Kim M, Cho M, Jang D. Optimized terahertz pulse generation with chirped pump pulses from an echelon-based tilted-pulse-front (TPF) scheme. Opt Express 2023; 31:26969-26979. [PMID: 37710545 DOI: 10.1364/oe.495481] [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] [Received: 05/12/2023] [Accepted: 07/17/2023] [Indexed: 09/16/2023]
Abstract
We successfully demonstrated the generation of single-cycle terahertz (THz) pulses through tilted-pulse-front (TPF) pumping using a reflective echelon in a lithium niobate crystal. By optimizing the pump pulse duration using a chirp, we achieved a maximum pump-to-THz conversion efficiency of 0.39%. However, we observed that the saturation behavior began at a relatively low pump energy (0.37 mJ), corresponding to a pump intensity of 22 GW/cm2. To elucidate this behavior, we measured the near- and far-field THz beam profiles and found variations in their beam characteristics, such as the beam size, location, and divergence angle in the plane of the tilted pulse direction, with the pump energy (intensity). This nonlinear behavior is attributed to the reduced effective interaction length, which ultimately leads to the saturation of THz generation. The results obtained from our study suggest that it is feasible to develop an effective THz source using echelon-based TPF pumping while also considering the impact of nonlinear saturation effects.
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Kim YY, Khubbutdinov R, Carnis J, Kim S, Nam D, Nam I, Kim G, Shim CH, Yang H, Cho M, Min CK, Kim C, Kang HS, Vartanyants IA. Statistical analysis of hard X-ray radiation at the PAL-XFEL facility performed by Hanbury Brown and Twiss interferometry. J Synchrotron Radiat 2022; 29:1465-1479. [PMID: 36345755 PMCID: PMC9641567 DOI: 10.1107/s1600577522008773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 09/02/2022] [Indexed: 06/16/2023]
Abstract
A Hanbury Brown and Twiss interferometry experiment based on second-order correlations was performed at the PAL-XFEL facility. The statistical properties of the X-ray radiation were studied within this experiment. Measurements were performed at the NCI beamline at 10 keV photon energy under various operation conditions: self-amplified spontaneous emission (SASE), SASE with a monochromator, and self-seeding regimes at 120 pC, 180 pC and 200 pC electron bunch charge. Statistical analysis showed short average pulse duration from 6 fs to 9 fs depending on the operational conditions. A high spatial degree of coherence of about 70-80% was determined in the spatial domain for the SASE beams with the monochromator and self-seeding regime of operation. The obtained values describe the statistical properties of the beams generated at the PAL-XFEL facility.
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Affiliation(s)
- Young Yong Kim
- Photon Science, Deutsche Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Ruslan Khubbutdinov
- Photon Science, Deutsche Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Jerome Carnis
- Photon Science, Deutsche Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - Sangsoo Kim
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Daewoong Nam
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
- Photon Science Center, POSTECH, Pohang 37673, Republic of Korea
| | - Inhyuk Nam
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Gyujin Kim
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Chi Hyun Shim
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Haeryong Yang
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Myunghoon Cho
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Chang-Ki Min
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Changbum Kim
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Heung-Sik Kang
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Ivan A. Vartanyants
- Photon Science, Deutsche Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
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Frydrych S, Vorberger J, Hartley NJ, Schuster AK, Ramakrishna K, Saunders AM, van Driel T, Falcone RW, Fletcher LB, Galtier E, Gamboa EJ, Glenzer SH, Granados E, MacDonald MJ, MacKinnon AJ, McBride EE, Nam I, Neumayer P, Pak A, Voigt K, Roth M, Sun P, Gericke DO, Döppner T, Kraus D. Demonstration of X-ray Thomson scattering as diagnostics for miscibility in warm dense matter. Nat Commun 2020; 11:2620. [PMID: 32457297 PMCID: PMC7251136 DOI: 10.1038/s41467-020-16426-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 04/29/2020] [Indexed: 11/12/2022] Open
Abstract
The gas and ice giants in our solar system can be seen as a natural laboratory for the physics of highly compressed matter at temperatures up to thousands of kelvins. In turn, our understanding of their structure and evolution depends critically on our ability to model such matter. One key aspect is the miscibility of the elements in their interiors. Here, we demonstrate the feasibility of X-ray Thomson scattering to quantify the degree of species separation in a 1:1 carbon-hydrogen mixture at a pressure of ~150 GPa and a temperature of ~5000 K. Our measurements provide absolute values of the structure factor that encodes the microscopic arrangement of the particles. From these data, we find a lower limit of [Formula: see text]% of the carbon atoms forming isolated carbon clusters. In principle, this procedure can be employed for investigating the miscibility behaviour of any binary mixture at the high-pressure environment of planetary interiors, in particular, for non-crystalline samples where it is difficult to obtain conclusive results from X-ray diffraction. Moreover, this method will enable unprecedented measurements of mixing/demixing kinetics in dense plasma environments, e.g., induced by chemistry or hydrodynamic instabilities.
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Affiliation(s)
- S Frydrych
- Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, Darmstadt, 64289, Germany
| | - J Vorberger
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, Dresden, 01328, Germany
| | - N J Hartley
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, Dresden, 01328, Germany
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - A K Schuster
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, Dresden, 01328, Germany
- Institute of Solid State and Materials Physics, Technische Universität Dresden, Dresden, 01069, Germany
| | - K Ramakrishna
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, Dresden, 01328, Germany
- Institute of Solid State and Materials Physics, Technische Universität Dresden, Dresden, 01069, Germany
| | - A M Saunders
- Department of Physics, University of California, Berkeley, CA, 94720, USA
| | - T van Driel
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - R W Falcone
- Department of Physics, University of California, Berkeley, CA, 94720, USA
- Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - L B Fletcher
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - E Galtier
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - E J Gamboa
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - S H Glenzer
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - E Granados
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - M J MacDonald
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
- University of Michigan, Ann Arbor, MI, 48109, USA
| | - A J MacKinnon
- Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - E E McBride
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
- European XFEL GmbH, Holzkoppel 4, Schenefeld, 22869, Germany
| | - I Nam
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - P Neumayer
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, Darmstadt, 64291, Germany
| | - A Pak
- Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA
| | - K Voigt
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, Dresden, 01328, Germany
- Institute of Solid State and Materials Physics, Technische Universität Dresden, Dresden, 01069, Germany
| | - M Roth
- Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, Darmstadt, 64289, Germany
| | - P Sun
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - D O Gericke
- Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - T Döppner
- Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA
| | - D Kraus
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, Dresden, 01328, Germany.
- Institute of Solid State and Materials Physics, Technische Universität Dresden, Dresden, 01069, Germany.
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6
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Kang HS, Yang H, Kim G, Heo H, Nam I, Min CK, Kim C, Baek SY, Choi HJ, Mun G, Park BR, Suh YJ, Shin DC, Hu J, Hong J, Jung S, Kim SH, Kim K, Na D, Park SS, Park YJ, Han JH, Jung YG, Jeong SH, Kim MJ, Lee HG, Lee S, Lee WW, Oh B, Suh HS, Park KH, Lee HS, Khan DZ, Raubenheimer TO, Wu J. FEL performance achieved at PAL-XFEL using a three-chicane bunch compression scheme. J Synchrotron Radiat 2019; 26:1127-1138. [PMID: 31274436 DOI: 10.1107/s1600577519005861] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 04/28/2019] [Indexed: 06/09/2023]
Abstract
PAL-XFEL utilizes a three-chicane bunch compression (3-BC) scheme (the very first of its kind in operation) for free-electron laser (FEL) operation. The addition of a third bunch compressor allows for more effective mitigation of coherent synchrotron radiation during bunch compression and an increased flexibility of system configuration. Start-to-end simulations of the effects of radiofrequency jitter on the electron beam performance show that using the 3-BC scheme leads to better performance compared with the two-chicane bunch compression scheme. Together with the high performance of the linac radiofrequency system, it enables reliable operation of PAL-XFEL with unprecedented stability in terms of arrival timing, pointing and intensity; an arrival timing jitter of better than 15 fs, a transverse position jitter of smaller than 10% of the photon beam size, and an FEL intensity jitter of smaller than 5% are consistently achieved.
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Affiliation(s)
- Heung Sik Kang
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Haeryong Yang
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Gyujin Kim
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Hoon Heo
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Inhyuk Nam
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Chang Ki Min
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Changbum Kim
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Soung Youl Baek
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Hyo Jin Choi
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Geonyeong Mun
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Byoung Ryul Park
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Young Jin Suh
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Dong Cheol Shin
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Jinyul Hu
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Juho Hong
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Seonghoon Jung
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Sang Hee Kim
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - KwangHoon Kim
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Donghyun Na
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Soung Soo Park
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Yong Jung Park
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Jang Hui Han
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Young Gyu Jung
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Seong Hun Jeong
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Min Jae Kim
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Hong Gi Lee
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Sangbong Lee
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Woul Woo Lee
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Bonggi Oh
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Hyung Suck Suh
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Ki Hyeon Park
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Heung Soo Lee
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - D Z Khan
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - T O Raubenheimer
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Juhao Wu
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
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7
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Kang HS, Yang H, Kim G, Heo H, Nam I, Min CK, Kim C, Baek SY, Choi HJ, Mun G, Park BR, Suh YJ, Shin DC, Hu J, Hong J, Jung S, Kim SH, Kim K, Na D, Park SS, Park YJ, Han JH, Jung YG, Jeong SH, Kim MJ, Lee HG, Lee S, Lee WW, Oh B, Suh HS, Park KH, Lee HS, Khan DZ, Raubenheimer TO, Wu J. FEL performance achieved at PAL-XFEL using a three-chicane bunch compression scheme. J Synchrotron Radiat 2019. [PMID: 31274436 DOI: 10.1038/s41566-017-0029-8] [Citation(s) in RCA: 166] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
PAL-XFEL utilizes a three-chicane bunch compression (3-BC) scheme (the very first of its kind in operation) for free-electron laser (FEL) operation. The addition of a third bunch compressor allows for more effective mitigation of coherent synchrotron radiation during bunch compression and an increased flexibility of system configuration. Start-to-end simulations of the effects of radiofrequency jitter on the electron beam performance show that using the 3-BC scheme leads to better performance compared with the two-chicane bunch compression scheme. Together with the high performance of the linac radiofrequency system, it enables reliable operation of PAL-XFEL with unprecedented stability in terms of arrival timing, pointing and intensity; an arrival timing jitter of better than 15 fs, a transverse position jitter of smaller than 10% of the photon beam size, and an FEL intensity jitter of smaller than 5% are consistently achieved.
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Affiliation(s)
- Heung Sik Kang
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Haeryong Yang
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Gyujin Kim
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Hoon Heo
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Inhyuk Nam
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Chang Ki Min
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Changbum Kim
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Soung Youl Baek
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Hyo Jin Choi
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Geonyeong Mun
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Byoung Ryul Park
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Young Jin Suh
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Dong Cheol Shin
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Jinyul Hu
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Juho Hong
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Seonghoon Jung
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Sang Hee Kim
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - KwangHoon Kim
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Donghyun Na
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Soung Soo Park
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Yong Jung Park
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Jang Hui Han
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Young Gyu Jung
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Seong Hun Jeong
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Min Jae Kim
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Hong Gi Lee
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Sangbong Lee
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Woul Woo Lee
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Bonggi Oh
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Hyung Suck Suh
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Ki Hyeon Park
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Heung Soo Lee
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - D Z Khan
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - T O Raubenheimer
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
| | - Juhao Wu
- Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Kyungbuk 37673, South Korea
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8
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Min CK, Nam I, Yang H, Kim G, Shim CH, Ko JH, Cho MH, Heo H, Oh B, Suh YJ, Kim MJ, Na D, Kim C, Kim Y, Chun SH, Lee JH, Kim J, Kim S, Eom I, Kim SN, Koo TY, Rah S, Shvyd'ko Y, Shu D, Kim KJ, Terentyev S, Blank V, Kang HS. Hard X-ray self-seeding commissioning at PAL-XFEL. J Synchrotron Radiat 2019; 26:1101-1109. [PMID: 31274433 DOI: 10.1107/s1600577519005460] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 04/22/2019] [Indexed: 06/09/2023]
Abstract
A wake monochromator based on a large-area diamond single crystal for hard X-ray self-seeding has been successfully installed and commissioned in the hard X-ray free-electron laser (FEL) at the Pohang Accelerator Laboratory with international collaboration. For this commissioning, the self-seeding was demonstrated with a low bunch charge (40 pC) and the nominal bunch charge (180 pC) of self-amplified spontaneous emission (SASE) operation. The FEL pulse lengths were estimated as 7 fs and 29.5 fs, respectively. In both cases, the average spectral brightness increased by more than three times compared with the SASE mode. The self-seeding experiment was demonstrated for the first time using a crystal with a thickness of 30 µm, and a narrow bandwidth of 0.22 eV (full width at half-maximum) was obtained at 8.3 keV, which confirmed the functionality of a crystal with such a small thickness. In the nominal bunch-charge self-seeding experiment, the histogram of the intensity integrated over a 1 eV bandwidth showed a well defined Gaussian profile, which is evidence of the saturated FEL and a minimal electron-energy jitter (∼1.2 × 10-4) effect. The corresponding low photon-energy jitter (∼2.4 × 10-4) of the SASE FEL pulse, which is two times lower than the Pierce parameter, enabled the seeding power to be maximized by maintaining the spectral overlap between SASE FEL gain and the monochromator.
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Affiliation(s)
- Chang Ki Min
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Inhyuk Nam
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Haeryong Yang
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Gyujin Kim
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Chi Hyun Shim
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Jun Ho Ko
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Myung Hoon Cho
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Hoon Heo
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Bonggi Oh
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Young Jin Suh
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Min Jae Kim
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Donghyun Na
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Changbum Kim
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Yongsam Kim
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Sae Hwan Chun
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Jae Hyuk Lee
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Jangwoo Kim
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Sunam Kim
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Intae Eom
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Seung Nam Kim
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Tae Yeong Koo
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Seungyu Rah
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Yuri Shvyd'ko
- Argonne National Laboratory, Argonne, IL 60439-4815, USA
| | - Deming Shu
- Argonne National Laboratory, Argonne, IL 60439-4815, USA
| | - Kwang Je Kim
- Argonne National Laboratory, Argonne, IL 60439-4815, USA
| | - Sergey Terentyev
- Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Moscow 142190, Russian Federation
| | - Vladimir Blank
- Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Moscow 142190, Russian Federation
| | - Heung Sik Kang
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
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9
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Hartley NJ, Vorberger J, Döppner T, Cowan T, Falcone RW, Fletcher LB, Frydrych S, Galtier E, Gamboa EJ, Gericke DO, Glenzer SH, Granados E, MacDonald MJ, MacKinnon AJ, McBride EE, Nam I, Neumayer P, Pak A, Rohatsch K, Saunders AM, Schuster AK, Sun P, van Driel T, Kraus D. Liquid Structure of Shock-Compressed Hydrocarbons at Megabar Pressures. Phys Rev Lett 2018; 121:245501. [PMID: 30608736 DOI: 10.1103/physrevlett.121.245501] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 10/15/2018] [Indexed: 06/09/2023]
Abstract
We present results for the ionic structure in hydrocarbons (polystyrene, polyethylene) that were shock compressed to pressures of up to 190 GPa, inducing rapid melting of the samples. The structure of the resulting liquid is then probed using in situ diffraction by an x-ray free electron laser beam, demonstrating the capability to obtain reliable diffraction data in a single shot, even for low-Z samples without long range order. The data agree well with ab initio simulations, validating the ability of such approaches to model mixed samples in states where complex interparticle bonds remain, and showing that simpler models are not necessarily valid. While the results clearly exclude the possibility of complete carbon-hydrogen demixing at the conditions probed, they also, in contrast to previous predictions, indicate that diffraction is not always a sufficient diagnostic for this phenomenon.
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Affiliation(s)
- N J Hartley
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
- Open and Transdisciplinary Research Institute, Osaka University, Suita, Osaka 565-0871, Japan
| | - J Vorberger
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - T Döppner
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Cowan
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - R W Falcone
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - L B Fletcher
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA
| | - S Frydrych
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
- Technische Universität Darmstadt, Schlossgartenstraße 9, 64289 Darmstadt, Germany
| | - E Galtier
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA
| | - E J Gamboa
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA
| | - D O Gericke
- Centre for Fusion, Space and Astrophysics, Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - S H Glenzer
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA
| | - E Granados
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA
| | - M J MacDonald
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA
- University of Michigan, Ann Arbor, Michigan 48109, USA
| | - A J MacKinnon
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA
| | - E E McBride
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA
- European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany
| | - I Nam
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA
| | - P Neumayer
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
| | - A Pak
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - K Rohatsch
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - A M Saunders
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - A K Schuster
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - P Sun
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA
| | - T van Driel
- SLAC National Accelerator Laboratory, Menlo Park, California 94309, USA
| | - D Kraus
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
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10
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Park SH, Kim M, Min CK, Eom I, Nam I, Lee HS, Kang HS, Kim HD, Jang HY, Kim S, Hwang SM, Park GS, Park J, Koo TY, Kwon S. PAL-XFEL soft X-ray scientific instruments and X-ray optics: First commissioning results. Rev Sci Instrum 2018; 89:055105. [PMID: 29864848 DOI: 10.1063/1.5023557] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
We report an overview of soft X-ray scientific instruments and X-ray optics at the free electron laser (FEL) of the Pohang Accelerator Laboratory, with selected first-commissioning results. The FEL exhibited a pulse energy of 200 μJ/pulse, a pulse width of <50 fs full width at half maximum, and an energy bandwidth of 0.44% at a photon energy of 850 eV. Monochromator resolving power of 10 500 was achieved. The estimated total time resolution between optical laser and X-ray pulses was <270 fs. A resonant inelastic X-ray scattering spectrometer was set up; its commissioning results are also reported.
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Affiliation(s)
- Sang Han Park
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Minseok Kim
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Changi-Ki Min
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Intae Eom
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Inhyuk Nam
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Heung-Soo Lee
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Heung-Sik Kang
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Hyeong-Do Kim
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Ho Young Jang
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Seonghan Kim
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Sun-Min Hwang
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Gi-Soo Park
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Jaehun Park
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Tae-Yeong Koo
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
| | - Soonnam Kwon
- PAL-XFEL, Pohang Accelerator Laboratory, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, South Korea
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11
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Brown SB, Hashim A, Gleason A, Galtier E, Nam I, Xing Z, Fry A, MacKinnon A, Nagler B, Granados E, Lee HJ. Shock drive capabilities of a 30-Joule laser at the matter in extreme conditions hutch of the Linac Coherent Light Source. Rev Sci Instrum 2017; 88:105113. [PMID: 29092479 DOI: 10.1063/1.4997756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We measure the shock drive capabilities of a 30 J, nanosecond, 527 nm laser system at the matter in extreme conditions hutch of the Linac Coherent Light Source. Using a velocity interferometer system for any reflector, we ascertain the maximum instantaneous ablation pressure and characterize its dependence on a drive laser spot size, spatial profile, and temporal profile. We also examine the effects of these parameters on shock spatial and temporal uniformity. Our analysis shows the drive laser capable of generating instantaneous ablation pressures exceeding 160 GPa while maintaining a 1D shock profile. We find that slope pulses provide higher instantaneous ablation pressures than plateau pulses. Our results show instantaneous ablation pressures comparable to those measured at the Omega Laser Facility in Rochester, NY under similar optical drive parameters. Finally, we analyze how optical laser ablation pressures are compare with known scaling relations, accounting for variable laser wavelengths.
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Affiliation(s)
| | - Akel Hashim
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Arianna Gleason
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Eric Galtier
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Inhyuk Nam
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Zhou Xing
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Alan Fry
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Andy MacKinnon
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Bob Nagler
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Eduardo Granados
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
| | - Hae Ja Lee
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
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12
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Nam I. Restoration-focused coping reduces complicated grief among older adults: A randomized controlled study. The European Journal of Psychiatry 2017. [DOI: 10.1016/j.ejpsy.2017.07.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Briggs R, Gorman MG, Coleman AL, McWilliams RS, McBride EE, McGonegle D, Wark JS, Peacock L, Rothman S, Macleod SG, Bolme CA, Gleason AE, Collins GW, Eggert JH, Fratanduono DE, Smith RF, Galtier E, Granados E, Lee HJ, Nagler B, Nam I, Xing Z, McMahon MI. Ultrafast X-Ray Diffraction Studies of the Phase Transitions and Equation of State of Scandium Shock Compressed to 82 GPa. Phys Rev Lett 2017; 118:025501. [PMID: 28128621 DOI: 10.1103/physrevlett.118.025501] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Indexed: 06/06/2023]
Abstract
Using x-ray diffraction at the Linac Coherent Light Source x-ray free-electron laser, we have determined simultaneously and self-consistently the phase transitions and equation of state (EOS) of the lightest transition metal, scandium, under shock compression. On compression scandium undergoes a structural phase transition between 32 and 35 GPa to the same bcc structure seen at high temperatures at ambient pressures, and then a further transition at 46 GPa to the incommensurate host-guest polymorph found above 21 GPa in static compression at room temperature. Shock melting of the host-guest phase is observed between 53 and 72 GPa with the disappearance of Bragg scattering and the growth of a broad asymmetric diffraction peak from the high-density liquid.
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Affiliation(s)
- R Briggs
- SUPA, School of Physics and Astronomy, and Centre for Science at Extreme Conditions, The University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom
| | - M G Gorman
- SUPA, School of Physics and Astronomy, and Centre for Science at Extreme Conditions, The University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom
| | - A L Coleman
- SUPA, School of Physics and Astronomy, and Centre for Science at Extreme Conditions, The University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom
| | - R S McWilliams
- SUPA, School of Physics and Astronomy, and Centre for Science at Extreme Conditions, The University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom
| | - E E McBride
- European XFEL, Albert-Einstein-Ring 19, D-22761 Hamburg, Germany
| | - D McGonegle
- Department of Physics, Clarendon Laboratory, Parks Road, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - J S Wark
- Department of Physics, Clarendon Laboratory, Parks Road, University of Oxford, Oxford OX1 3PU, United Kingdom
| | - L Peacock
- Atomic Weapons Establishment, Aldermaston, Reading RG7 4PR, United Kingdom
| | - S Rothman
- Atomic Weapons Establishment, Aldermaston, Reading RG7 4PR, United Kingdom
| | - S G Macleod
- Atomic Weapons Establishment, Aldermaston, Reading, RG7 4PR, United Kingdom and Institute of Shock Physics, Imperial College London, SW7 2AZ, United Kingdom
| | - C A Bolme
- Shock and Detonation Physics, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USA
| | - A E Gleason
- Shock and Detonation Physics, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545, USA
| | - G W Collins
- Lawrence Livermore National Laboratory, 6000 East Avenue, Livermore, California 94500, USA
| | - J H Eggert
- Lawrence Livermore National Laboratory, 6000 East Avenue, Livermore, California 94500, USA
| | - D E Fratanduono
- Lawrence Livermore National Laboratory, 6000 East Avenue, Livermore, California 94500, USA
| | - R F Smith
- Lawrence Livermore National Laboratory, 6000 East Avenue, Livermore, California 94500, USA
| | - E Galtier
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - E Granados
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - H J Lee
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - B Nagler
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - I Nam
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - Z Xing
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - M I McMahon
- SUPA, School of Physics and Astronomy, and Centre for Science at Extreme Conditions, The University of Edinburgh, Mayfield Road, Edinburgh, EH9 3JZ, United Kingdom and Research Complex at Harwell, Didcot, Oxon OX11 0FA, United Kingdom
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14
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Nikitina N, Aleksandrova O, Nam I, Rodionova N, Rebrov A. AB0561 Heart Involvement in Patients with Eosinophilic Granulomatosis with Polyangiitis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.4357] [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: 11/03/2022]
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15
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Choi D, Han B, Kim J, Kim H, Jang G, Kwon J, Kim H, Kim H, Jung J, Kim H, Nam I, Yoon H, Bae HS, Park YS, Lee H, Kang S, Cho J, Song H, Zang D. P-149 Changes of quality of life in elderly gastrointestinal cancer patients after curative surgery in South Korea. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv233.149] [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: 11/15/2022] Open
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16
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Gaydukova I, Rebrov A, Nikitina N, Nam I. SAT0348 Efficacy and Safety of Different Schemes of Etoricoxib Administration in Patients with Axial Spondyloarthritis - Results of A 12-Week, Prospective, Open-Label Study: Table 1. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3966] [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: 11/04/2022]
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Beketova T, Alexandrova E, Novoselova T, Sazhina E, Nikolaeva E, Smirnov A, Sorotskaya V, Zemerova E, Nam I, Nikitina N, Arkhangelskaya G, Bagautdinova Z, Dashkov I, Chernykh S, Zhirnova O, Lushpaeva Y, Masneva L, Afanasjeva I, Arsenyev A, Kondratenko I, Bashkova I, Glukhova S, Nasonov E. AB0598 Rituximab Treatment in Patients with Antineutrophil Cytoplasmic Antibody-Associated Vasculitis: Results from A Russian Registry (NORMA): Table 1. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.1960] [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: 11/04/2022]
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Nam I, Park J, Kim C, Kim S, Cho K, Kim M. Role of Supracricoid Partial Laryngectomy in the Aging Era. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2013.11.083] [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: 10/25/2022]
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Nam I, Kulagin VV, Hur MS, Lee IW, Suk H. Generating nearly single-cycle pulses with increased intensity and strongly asymmetric pulses of petawatt level. Phys Rev E Stat Nonlin Soft Matter Phys 2012; 85:026405. [PMID: 22463335 DOI: 10.1103/physreve.85.026405] [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: 11/26/2010] [Revised: 11/13/2011] [Indexed: 05/31/2023]
Abstract
Generation of petawatt-class pulses with a nearly single-cycle duration or with a strongly asymmetric longitudinal profile using a thin plasma layer are investigated via particle-in-cell simulations and the analytical flying mirror model. It is shown that the transmitted pulses having a duration as short as about 4 fs (1.2 laser cycles) or one-cycle front (tail) asymmetric pulses with peak intensity of about 10^{21}W/cm^{2} can be produced by optimizing system parameters. Here, a new effect is found for the shaping of linearly polarized laser pulses, owing to which the peak amplitude of the transmitted pulse becomes larger than that of the incoming pulse, and intense harmonics are generated. Characteristics of the transmitting window are then studied for different parameters of laser pulse and plasma layer. For a circular polarization, it is shown that the flying mirror model developed for shaping laser pulses with ultrathin foils can be successfully applied to plasma layers having a thickness of about the laser wavelength, which allows the shape of the transmitted pulse to be analytically predicted.
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Affiliation(s)
- Inhyuk Nam
- Department of Photonics and Applied Physics, Gwangju Institute of Science and Technology, Gwangju 500-712, Korea
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