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A single-shot transmissive spectrometer for hard x-ray free electron lasers

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4736725· OSTI ID:22089285
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  1. Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025 (United States)

We report hard x-ray single-shot spectral measurements of the Linac Coherent Light Source. The spectrometer is based on a 10 {mu}m thick cylindrically bent Si single crystal operating in the symmetric Bragg geometry to provide dispersion and high transmission simultaneously. It covers a spectral range >1% using the Si(111) reflection. Using the Si(333) reflection, it reaches a resolving power of better than 42 000 and transmits >83% of the incident flux at 8.3 keV. The high resolution enabled the observation of individual spectral spikes characteristic of a self-amplified spontaneous emission x-ray free electron laser source. Potential applications of the device are discussed.

OSTI ID:
22089285
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 3 Vol. 101; ISSN APPLAB; ISSN 0003-6951
Country of Publication:
United States
Language:
English