Journal
X-RAY FREE-ELECTRON LASERS: BEAM DIAGNOSTICS, BEAMLINE INSTRUMENTATION, AND APPLICATIONS
Volume 8504, Issue -, Pages -Publisher
SPIE-INT SOC OPTICAL ENGINEERING
DOI: 10.1117/12.929759
Keywords
delay line; X-ray optics; XPCS; FEL; coherence
Categories
Funding
- German Federal Ministry for Education and Research [BMBF- 05K10KTB]
- DFG [SFB925]
- Excellence cluster Frontiers in Quantum Photon Science
- U. S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering
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A hard X-ray delay line device capable of splitting single FEL X-ray pulses into two adjustable fractions and recombining them with the goal of performing X-ray Photon Correlation Spectroscopy and pump - probe type studies was designed. The performance of the device has been verified at the XPP and XCS instruments of LCLS. The measured throughput of the device at 7.9 keV is 3.6%. The coherence properties of the LCLS beam passing through the delay line were investigated by analyzing speckle patterns produced by single LCLS pulses. A high speckle contrast of 0.69 was found, indicating the feasibility of performing coherence based experiments with the delay line.
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