Abstract

A beam line U2A for microscopy, SEXAFS, and soft X-ray holography is being designed at NSRL, USTC, China. A preliminary design for U2A is presented, utilizing a linear monochromator consisting of a zone plate and a diaphragm. The parameters for these elements are as follows: the condenser zone plate has D = 6.0m,N = 10000, δRn = 0.15 μm, and F = 204.5 mm. The diaphragm has d = 24 μm. A spectral resolution λ/ Δλ = 125 would be achieved.

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