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Proceedings Paper

The MEL-X project at the Lawrence Livermore National Laboratory: a mirror-based delay line for x-rays
Author(s): Tom Pardini; Randy Hill; Todd Decker; Jennifer Alameda; Regina Soufli; Andy Aquila; Serge Guillet; Sébastien Boutet; Stefan P. Hau-Riege
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Paper Abstract

At the Lawrence Livermore National Laboratory (LLNL) in collaboration with the Linac Coherent Light Source (LCLS) we are developing a mirror-based delay line for x-rays (MEL-X) to enable x-ray pump/x-ray probe experiments at Free Electron Lasers (XFELs). The goal of this project is the development and deployment of a proof-of-principle delay line featuring coated x-ray optics. The four-mirror design of the MEL-X is motivated by the need for ease of alignment and use. In order to simplify the overlap of the pump and the probe beam after each delay time change, a scheme involving super-polished rails and mirror-to-motor decoupling has been adopted. The MEL-X, used in combination with a bright pulsed source like LCLS, features a capability for a high intensity pump beam. Its Iridium coating allows it to work at hard x-ray energies all the way up to 9 keV, with a probe beam transmission of 35% up to 8keV, and 14% at 9keV. The delay time can be tailored to each particular experiment, with a nominal range of 70 - 350 fs for this prototype. The MEL-X, combined with established techniques such as x-ray diffraction, absorption or emission, could provide new insights on ultra-fast transitions in highly excited states of matter.

Paper Details

Date Published: 22 September 2015
PDF: 7 pages
Proc. SPIE 9589, X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XI, 95890T (22 September 2015); doi: 10.1117/12.2186796
Show Author Affiliations
Tom Pardini, Lawrence Livermore National Lab. (United States)
Randy Hill, Lawrence Livermore National Lab. (United States)
Todd Decker, Lawrence Livermore National Lab. (United States)
Jennifer Alameda, Lawrence Livermore National Lab. (United States)
Regina Soufli, Lawrence Livermore National Lab. (United States)

Andy Aquila, SLAC National Accelerator Lab. (United States)
Serge Guillet, SLAC National Accelerator Lab. (United States)
Sébastien Boutet, SLAC National Accelerator Lab. (United States)
Stefan P. Hau-Riege, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 9589:
X-Ray Lasers and Coherent X-Ray Sources: Development and Applications XI
Annie Klisnick; Carmen S. Menoni, Editor(s)

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