17 October 2012 Hard x-ray delay line for x-ray photon correlation spectroscopy and jitter-free pump-probe experiments at LCLS
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Abstract
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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Wojciech Roseker, Wojciech Roseker, Sooheyong Lee, Sooheyong Lee, Michael Walther, Michael Walther, Horst Schulte-Schrepping, Horst Schulte-Schrepping, Hermann Franz, Hermann Franz, Amber Gray, Amber Gray, Marcin Sikorski, Marcin Sikorski, Paul H. Fuoss, Paul H. Fuoss, G. Brian Stephenson, G. Brian Stephenson, Aymeric Robert, Aymeric Robert, Gerhard Grübel, Gerhard Grübel, } "Hard x-ray delay line for x-ray photon correlation spectroscopy and jitter-free pump-probe experiments at LCLS", Proc. SPIE 8504, X-Ray Free-Electron Lasers: Beam Diagnostics, Beamline Instrumentation, and Applications, 85040I (17 October 2012); doi: 10.1117/12.929759; https://doi.org/10.1117/12.929759
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