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3 September 2008 Multilayer optics under CHESS A2 wiggler beam
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The CHESS A-line 49 pole wiggler produces a total power of 6.6 kW when operating at 5.3 GeV and 200 mA current. Half of this beam is directed into the A2 station operating with both crystal and multilayer optics. The heat load response of the multilayer optics was studied by changing the total power deposited on the first multilayer by varying the slit size. The W/B4C, 300 bi-layers, d=15 Å multilayers with the energy resolution of ΔE/E=0.5% were used in our experiment. The results from identical multilayers deposited on Si and SiC substrates, which differ by a factor of two in thermal conductivity, are presented and compared. The thermal distortions of the first multilayer were measured by using recently developed optical in-situ visualization technique and compared with ANSYS simulations. X-ray measurements of the monochromator throughput and effective source size confirm the results of the optical measurements and ANSYS simulations and demonstrate the superior behavior of SiC-substrate based ML optics under high heat load.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. Kazimirov, P. Revesz, and Rong Huang "Multilayer optics under CHESS A2 wiggler beam", Proc. SPIE 7077, Advances in X-Ray/EUV Optics and Components III, 707702 (3 September 2008);


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