期刊
OPTICS EXPRESS
卷 23, 期 22, 页码 29032-29037出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.23.029032
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资金
- Ministry of Education, Sports, Culture, Science and Technology, Japan [23226004, 25129]
- Grants-in-Aid for Scientific Research [23226004, 13J00129] Funding Source: KAKEN
We evaluated the irradiation damage induced by hard X-ray free-electron lasers to platinum/carbon multilayers intended for use in a focusing reflective mirror. In order to determine the damage threshold, we compared X-ray reflectivities before and after irradiation at the first-order Bragg angle using a focused X-ray free-electron laser with a beam size of approximately 1 mu m and a pulse energy ranging from 0.01 to 10 mu J at a photon energy of 10 keV. We confirmed that the damage threshold of the platinum/carbon multilayer with a bilayer period of 3 nm was 0.051 mu J/mu m(2), which is sufficiently higher than that in practical applications. (C) 2015 Optical Society of America
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