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Title: Damage threshold of coating materials on x-ray mirror for x-ray free electron laser

Abstract

We evaluated the damage threshold of coating materials such as Mo, Ru, Rh, W, and Pt on Si substrates, and that of uncoated Si substrate, for mirror optics of X-ray free electron lasers (XFELs). Focused 1 μm (full width at half maximum) XFEL pulses with the energies of 5.5 and 10 keV, generated by the SPring-8 angstrom compact free electron laser (SACLA), were irradiated under the grazing incidence condition. The damage thresholds were evaluated by in situ measurements of X-ray reflectivity degradation during irradiation by multiple pulses. The measured damage fluences below the critical angles were sufficiently high compared with the unfocused SACLA beam fluence. Rh coating was adopted for two mirror systems of SACLA. One system was a beamline transport mirror system that was partially coated with Rh for optional utilization of a pink beam in the photon energy range of more than 20 keV. The other was an improved version of the 1 μm focusing mirror system, and no damage was observed after one year of operation.

Authors:
; ; ; ; ; ; ;  [1];  [1]; ; ;  [2]
  1. Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo-Cho, Sayo-Gun, Hyogo 679-5198 (Japan)
  2. Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871 (Japan)
Publication Date:
OSTI Identifier:
22597921
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 87; Journal Issue: 5; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BEAMS; COMPARATIVE EVALUATIONS; DAMAGE; ELECTRONS; FREE ELECTRON LASERS; GRAZING; IRRADIATION; KEV RANGE; MIRRORS; OPTICS; PHOTONS; PULSES; REFLECTIVITY; SPRING-8 STORAGE RING; SUBSTRATES; X RADIATION

Citation Formats

Koyama, Takahisa, Yumoto, Hirokatsu, Tono, Kensuke, Togashi, Tadashi, Inubushi, Yuichi, Katayama, Tetsuo, Yabashi, Makina, Ohashi, Haruhiko, RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-Cho, Sayo-Gun, Hyogo 679-5148, Miura, Takanori, Kim, Jangwoo, Matsuyama, Satoshi, and Yamauchi, Kazuto. Damage threshold of coating materials on x-ray mirror for x-ray free electron laser. United States: N. p., 2016. Web. doi:10.1063/1.4950723.
Koyama, Takahisa, Yumoto, Hirokatsu, Tono, Kensuke, Togashi, Tadashi, Inubushi, Yuichi, Katayama, Tetsuo, Yabashi, Makina, Ohashi, Haruhiko, RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-Cho, Sayo-Gun, Hyogo 679-5148, Miura, Takanori, Kim, Jangwoo, Matsuyama, Satoshi, & Yamauchi, Kazuto. Damage threshold of coating materials on x-ray mirror for x-ray free electron laser. United States. https://doi.org/10.1063/1.4950723
Koyama, Takahisa, Yumoto, Hirokatsu, Tono, Kensuke, Togashi, Tadashi, Inubushi, Yuichi, Katayama, Tetsuo, Yabashi, Makina, Ohashi, Haruhiko, RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-Cho, Sayo-Gun, Hyogo 679-5148, Miura, Takanori, Kim, Jangwoo, Matsuyama, Satoshi, and Yamauchi, Kazuto. Sun . "Damage threshold of coating materials on x-ray mirror for x-ray free electron laser". United States. https://doi.org/10.1063/1.4950723.
@article{osti_22597921,
title = {Damage threshold of coating materials on x-ray mirror for x-ray free electron laser},
author = {Koyama, Takahisa and Yumoto, Hirokatsu and Tono, Kensuke and Togashi, Tadashi and Inubushi, Yuichi and Katayama, Tetsuo and Yabashi, Makina and Ohashi, Haruhiko and RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-Cho, Sayo-Gun, Hyogo 679-5148 and Miura, Takanori and Kim, Jangwoo and Matsuyama, Satoshi and Yamauchi, Kazuto},
abstractNote = {We evaluated the damage threshold of coating materials such as Mo, Ru, Rh, W, and Pt on Si substrates, and that of uncoated Si substrate, for mirror optics of X-ray free electron lasers (XFELs). Focused 1 μm (full width at half maximum) XFEL pulses with the energies of 5.5 and 10 keV, generated by the SPring-8 angstrom compact free electron laser (SACLA), were irradiated under the grazing incidence condition. The damage thresholds were evaluated by in situ measurements of X-ray reflectivity degradation during irradiation by multiple pulses. The measured damage fluences below the critical angles were sufficiently high compared with the unfocused SACLA beam fluence. Rh coating was adopted for two mirror systems of SACLA. One system was a beamline transport mirror system that was partially coated with Rh for optional utilization of a pink beam in the photon energy range of more than 20 keV. The other was an improved version of the 1 μm focusing mirror system, and no damage was observed after one year of operation.},
doi = {10.1063/1.4950723},
url = {https://www.osti.gov/biblio/22597921}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 5,
volume = 87,
place = {United States},
year = {2016},
month = {5}
}