Overview of near vs. far field radiation characteristics of the linac coherent light source (LCLS)

R. Tatchyn

doi:10.1117/12.624920

14 September 2005 Overview of near vs. far field radiation characteristics of the linac coherent light source (LCLS)

R. Tatchyn

Proceedings Volume 5917, Fourth Generation X-Ray Sources and Optics III; 591707 (2005) https://doi.org/10.1117/12.624920
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

The unusually long insertion devices being prepared for Ångstrom-wavelength Free Electron Lasers (FELs) will generate spectral-angular distributions in the proposed experimental areas that are substantially different from those conventionally calculated for the far field. In this paper we provide a general overview of near-field effects and report on initial computational simulations of near vs. far field distributions for the SLAC linac Coherent Light Source (LCLS) undulator, an insertion device approximately 140 meters long. The properties of the coherent radiation as a limiting case of the near-field emission, for the special condition of a microbunched beam radiating along the undulator axis, are reviewed.

Citation Download Citation

R. Tatchyn "Overview of near vs. far field radiation characteristics of the linac coherent light source (LCLS)", Proc. SPIE 5917, Fourth Generation X-Ray Sources and Optics III, 591707 (14 September 2005); https://doi.org/10.1117/12.624920

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