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Proceedings Paper

Duty-cycle dependence of the filamentation effect in gas devices for high repetition rate pulsed x-ray FELs
Author(s): Yiping Feng; Tor O. Raubenheimer
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Paper Abstract

Time-dependent simulations were carried out to study the duty-cycle dependence of the density depression effect in gas attenuators and gas intensity monitors servicing a high repetition rate pulsed Free-electron laser beam. The evolution of the temperature/density gradients in-between the pulses in the entire gas volume, especially during the on-cycle, were obtained to evaluate the performance of any given pulse. It was found that the actual achieved attenuation in the attenuator or the intensity measured by the gas monitor deviates from the asymptotic value expected for a uniformly spaced pulse train after reaching a steady state, becoming progressively more significant as the duty-cycle tends lower.

Paper Details

Date Published: 20 June 2017
PDF: 13 pages
Proc. SPIE 10237, Advances in X-ray Free-Electron Lasers Instrumentation IV, 1023714 (20 June 2017); doi: 10.1117/12.2261226
Show Author Affiliations
Yiping Feng, SLAC National Accelerator Lab. (United States)
Tor O. Raubenheimer, SLAC National Accelerator Lab. (United States)

Published in SPIE Proceedings Vol. 10237:
Advances in X-ray Free-Electron Lasers Instrumentation IV
Thomas Tschentscher; Luc Patthey, Editor(s)

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