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Abstract

The data presented in this work comprises a detailed analysis on the interplay between diffraction orders of the SASE3 monochromator, which includes transmission by optics (both due to efficiency and geometrical transmission), constraints on operational range, and details on spatial separation of the orders. The possible harmful orders to be dumped and their geometry are identified and described; the dispersed beam at exit slit plane is discussed. In addition to simultaneous usage of different diffraction orders, a feasibility of simultaneous usage of FEL fundamental and 3rd harmonic in a scheme of spatial separation by the grating is analysed.

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