title: High wavevector temporal speckle correlations at the Linac Coherent Light Source.
abstract: We report on the feasibility of high wavevector temporal speckle correlation measurements at the world's first hard x-ray free electron laser, the Linac Coherent Light Source (LCLS). Due to the chaotic nature of LCLS, the spectral profile of the x-ray radiation fluctuates on a pulse-to-pulse basis. Its impact on the determination of the single shot speckle contrast in a wide angle x-ray scattering geometry is investigated by analyzing FEL power spectra that are simulated based on the nominal operational parameters of LCLS. Ultimately, a potential scheme to deliver a single-mode hard x-ray pulse is proposed by using a narrow bandpass crystal monochromator.
authors.affiliation: Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA. shlee@slac.stanford.edu
authors.forename: Sooheyong
authors.initials: S
authors.lastname: Lee
authors.forename: Wojciech
authors.initials: W
authors.lastname: Roseker
authors.forename: Christian
authors.initials: C
authors.lastname: Gutt
authors.forename: Zhirong
authors.initials: Z
authors.lastname: Huang
authors.forename: Yuantao
authors.initials: Y
authors.lastname: Ding
authors.forename: Gerhard
authors.initials: G
authors.lastname: Grübel
authors.forename: Aymeric
authors.initials: A
authors.lastname: Robert
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005240:Feasibility Studies; D010315:Particle Accelerators; D014961:X-Ray Diffraction / Q000295:instrumentation*