Coherence and linewidth studies of a 4-nm high power FEL

Conference · Sat May 01 04:00:00 EDT 1993

OSTI ID:10176766

Fawley, W M; Sessler, A M ^[1]; Scharlemann, E T ^[2]

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1. Lawrence Berkeley Lab., CA (United States)
2. Lawrence Livermore National Lab., CA (United States)

Recently the SSRL/SLAC and its collaborators elsewhere have considered the merits of a 2 to 4-nm high power FEL utilizing the SLAC linac electron beam. The FEL would be a single pass amplifier excited by spontaneous emission rather than an oscillator, in order to eliminate the need for a soft X-ray resonant cavity. We have used GINGER, a multifrequency 2D FEL simulation code, to study the expected linewidth and coherence properties of the FEL, in both the exponential and saturated gain regimes. We present results concerning the effective shot noise input power and mode shape, the expected subpercent output line widths, photon flux, and the field temporal and spatial correlation functions. We also discuss the effects of tapering the wiggler upon the output power and line width.

• Research Organization: Lawrence Berkeley Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 10176766
• Report Number(s): LBL--33285; HIFAN--570; CONF-930511--323; ON: DE93018533
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200
BEAM DYNAMICS, FIELD CALCULATIONS, AND ION OPTICS
COHERENT RADIATION
COMPUTERIZED SIMULATION
ELECTRON BEAMS
FREE ELECTRON LASERS
G CODES
LINE WIDTHS
LINEAR ACCELERATORS
WIGGLER MAGNETS