Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Byoung-ick Cho"'
Autor:
Tae-Kyu Choi, Jaeku Park, Gyujin Kim, Hoyoung Jang, Sang-Youn Park, Jang Hyeob Sohn, Byoung Ick Cho, Hyunjung Kim, Kyung Sook Kim, Inhyuk Nam, Sae Hwan Chun
Publikováno v:
Journal of Synchrotron Radiation, Vol 30, Iss 6, Pp 1038-1047 (2023)
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
Externí odkaz:
https://doaj.org/article/256d336128564512b9737a78b49797d9
Autor:
Jang Hyeob Sohn, Gyeongbo Kang, Tae-Kyu Choi, Gyusang Lee, Changhoo Lee, Sae Hwan Chun, Jaeku Park, Dongbin Shin, Byoung-Ick Cho
Publikováno v:
Structural Dynamics, Vol 11, Iss 2, Pp 024304-024304-8 (2024)
This paper presents the implementation of high-energy-resolution off-resonant spectroscopy (HEROS) measurements using self-seeded x-ray free-electron laser (XFEL) pulses. This study systematically investigated XFEL conditions, including photon energy
Externí odkaz:
https://doaj.org/article/a33b9cd9a731434d8ddb33e35a9d4d62
Autor:
Byoung-ick Cho, Gyeongbo Kang
Publikováno v:
Current Applied Physics. 30:58-68
The advent of high-power lasers has provided insights into laboratory high energy density (>1011 J/m3) physics. In particular, the properties of warm dense matter (WDM) with temperatures of 104–106 K and near-solid densities is a research area that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::17ad74a27da6f57420ca0f07b46a8a89
https://doi.org/10.1016/j.cap.2021.05.006
https://doi.org/10.1016/j.cap.2021.05.006
Publikováno v:
Journal of the Korean Physical Society. 78:1072-1083
The plasma opacities of the widely used X-pinch target materials (Cu, Mo, W) are calculated over a wide temperature and density range (T = 10–3–102 keV, ρ = 1016–1024 cm−3) by using the collisional radiative code FLYCHK. Including the scatte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd4cb17e95481cebaaf60687f4a9544f
https://doi.org/10.1007/s40042-021-00173-4
https://doi.org/10.1007/s40042-021-00173-4
Autor:
Byoung Ick Cho
Publikováno v:
Applied Sciences, Vol 9, Iss 22, p 4812 (2019)
The recent progress in the development of X-ray free electron lasers (XFELs) allows for the delivery of over 1011 high-energy photons to solid-density samples in a femtosecond time scale. The corresponding peak brightness of XFEL induces a nonlinear
Externí odkaz:
https://doaj.org/article/581fecf7235549088d8d07e2958c5f65
Publikováno v:
Current Applied Physics. 30:1-3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de23a236c5c157f9ccc856550fd306e1
https://doi.org/10.1016/j.cap.2021.07.005
https://doi.org/10.1016/j.cap.2021.07.005
Autor:
Gyeongbo Kang, Jong Won Lee, Sang Han Park, Minseok Kim, Soonnam Kwon, Seonghyeok Yang, Byoung-ick Cho, Minju Kim
Publikováno v:
Journal of Synchrotron Radiation. 27:953-958
Free-electron laser pulse-based X-ray absorption spectroscopy measurements on warm dense copper are presented. The incident X-ray pulse energies were measured with a detector assembly consisting of a photocathode membrane and microchannel plates, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6a049e415061880eef497150fd9a2437
https://doi.org/10.1107/s160057752000524x
https://doi.org/10.1107/s160057752000524x
Autor:
K. Engelhorn, David Prendergast, B. Barbrel, Ji-Myon Lee, Roger Falcone, Leejin Bae, Das Pemmaraju, Tadashi Ogitsu, Philip Heimann, Byoung-ick Cho, A. Fernandez-Pañella, Martha A. Beckwith, Alfredo A. Correa, Sebastien Hamel, Yuan Ping
Publikováno v:
Physical Review B. 101
The electron-ion relaxation dynamics in warm dense iron were investigated by time-resolved x-ray absorption near-edge spectroscopy (XANES). A novel analysis, combining ab initio density functional theory (DFT) and two temperature model (TTM) simulati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62be0484cf9a7b02873ed797a110e7bc
https://doi.org/10.1103/physrevb.101.184309
https://doi.org/10.1103/physrevb.101.184309
Autor:
Seong Hyeok Yang, Suhyeon Lee, Gyeongbo Kang, Janghyeob Sohn, Jae Hyung Jung, Minju Kim, Byoung-ick Cho, Min Sang Cho, Gyusang Lee, Jong-Won Lee
Publikováno v:
Applied Surface Science. 561:150073
Above the damage threshold of Au nanofoil, experimental and theoretical investigations of the fluence-dependent self-reflection of intense femtosecond laser pulses are presented. Measured reflectance shows not only the fluence-dependency, but also th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4658c124d05f1ec75596a41b10adbb16
https://doi.org/10.1016/j.apsusc.2021.150073
https://doi.org/10.1016/j.apsusc.2021.150073
Publikováno v:
Journal of Nuclear Materials. 487:305-310
Laser induced breakdown spectroscopy (LIBS) has been tested to diagnose impurity elements on a Korea Superconducting Tokamak Advanced Research (KSTAR) divertor tile. Spectral lines of various impurity elements such as iron, chromium, and nickel were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ded4a5118766d6103b11205e29b2f70f
https://doi.org/10.1016/j.jnucmat.2017.02.025
https://doi.org/10.1016/j.jnucmat.2017.02.025