Damage threshold of platinum/carbon multilayers under hard X-ray free-electron laser irradiation

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 usi...

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Bibliographic Details
Published in:	Optics express Vol. 23; no. 22; pp. 29032 - 29037
Main Authors:	Kim, Jangwoo, Nagahira, Ayaka, Koyama, Takahisa, Matsuyama, Satoshi, Sano, Yasuhisa, Yabashi, Makina, Ohashi, Haruhiko, Ishikawa, Tetsuya, Yamauchi, Kazuto
Format:	Journal Article
Language:	English
Published:	United States 02-11-2015
Online Access:	Get full text
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Summary:	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 μm and a pulse energy ranging from 0.01 to 10 μJ 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 μJ/μm(2), which is sufficiently higher than that in practical applications.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1094-4087 1094-4087
DOI:	10.1364/oe.23.029032