Seeded FEL Amplifier-Buncher in the 0.5-9 THz for Advanced Accelerators

Journal Article · Thu Jan 22 04:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3080956· OSTI ID:21255268

Tochitsky, S Ya; Reiche, S; Sung, C; Rosenzweig, J B; Joshi, C ^[1]; Gottschalk, S C; Kelly, R ^[2]

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1. Neptune Laboratory, Departments of Electrical Engineering and Physics, University of California, Los Angeles, CA 90095 (United States)
2. STI Optronics, Inc., Bellevue, WA 98004-1495 (United States)

Longitudinal modulation of a relativistic electron beam in the THz range is important for advanced laser- or beam-driven plasma accelerators operating in the 10{sup 16}-10{sup 18} cm{sup -3} plasma density range. We describe a single-pass FEL amplifier-buncher which is under construction at the UCLA Neptune laboratory. Microbunching on the 0.5-3 THz frequency scale is achieved during the process of a resonant FEL interaction between an electron beam and a THz seed pulse. A narrow-band, low-power THz seed source based on the frequency mixing of CO{sub 2} laser lines in a GaAs nonlinear crystal is built and fully characterized. The THz radiation pulse generated by this source will be guided through a hollow waveguide inside the planar FEL undulator driven by a regular photoinjector. By using a time-dependent FEL code GENESIS 1.3, we optimized the undulator parameters and analyzed the dynamics of the modulated electron beam. At present, the THz FEL microbuncher is being built and we update the status of the project.

• OSTI ID: 21255268
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1086; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
AMPLIFIERS
CARBON DIOXIDE LASERS
CRYSTALS
ELECTRON BEAMS
FREQUENCY MIXING
GALLIUM ARSENIDES
LINEAR ACCELERATORS
MODULATION
NONLINEAR PROBLEMS
PLASMA
PLASMA DENSITY
PLASMA GUNS
PULSES
RELATIVISTIC RANGE
THZ RANGE 01-100
TIME DEPENDENCE
UCLA
WAVEGUIDES
WIGGLER MAGNETS