Physics – Optics
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spie.7360e..18m&link_type=abstract
EUV and X-Ray Optics: Synergy between Laboratory and Space. Edited by Hudec, René; Pina, Ladislav. Proceedings of the SPIE, Vo
Physics
Optics
Scientific paper
A double-periodic multilayer method was proposed to test KBA system of 4.75keV using 8keV source. Alignment of angle is the key for most of grazing incidence systems in x-ray range. But for soft x-ray, strong absorption makes the alignment have to be operated in vacuum, which is difficult enough. A double-periodic multilayer was used to experiment at 8keV in air replacing 4.75keV in vacuum. This multilayer includes two parts, the top and the bottom. The top is W/B4C multilayer with four bilayers and 6.93nm periods. The bottom is W/B4C multilayer with 10 bilayers and 3.95nm periods. For 8keV energy, x-ray will penetrate through the top and reflected by the bottom. While for 4.75keV, x-ray will be reflected by the top directly. The full width of half maximum is 0.1° at 8keV and 0.3° at 4.75keV, so it is accurate enough for 4.75keV to experiment at 8keV, which was also verified by the 1-D KBA experiment. This double-periodic multilayer provides a valid solution for alignment in soft x-ray range.
Chen Lingyan
Huang Qiushi
Huang Yi
Jiang Li
Liu Hongying
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