[SLAC] [SLAC Pubs and Reports]
SLAC-PUB-6107
Infrared (Ir) vs. X-Ray Power Generation in the Linac Coherent Light Source (LCLS)
Abstract
The LCLS, a Free-Electron Laser (FEL) designed for Operation at a
first harmonic energy of 300 eV (Lambda = 40 Angstrom) in the
Self-Amplified Spontaneous Emission (SASE) regime, will utilize
electron bunches compressed down to durations of < O.5ps, or lengths of
<150mu. It is natural to inquire whether coherent radiation of
this (and longer) wavelength will constitute a significant component
of the total coherent output of the FBL. In this paper a determination
of a simple upper bound on the IR that can be generated by the
compressed bunches is outlined. Under the assumed operating parameters
of the LCLS undulator, it is shown that the IR component of the
coherent output should be strongly dominated by the x-ray
component.
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