Experimental Observation of Femtosecond Electron Beam Microbunching by Inverse Free-Electron-Laser Acceleration
- University of California, Los Angeles, California 90095 (United States)
- Brookhaven National Laboratory, Upton, New York 11973 (United States)
An electron beam microbunched on the optical wavelength scale of {approx}2.5 {mu} m by an inverse free electron laser accelerator was observed. The optimum bunching was achieved for a 1{percent} energy modulation of a 32MeV electron beam with 0.5GW CO{sub 2} laser power. The microbunching process was investigated by measuring the coherent transition radiation produced by the energy modulated electron beam. A quadratic dependence of the transition radiation signal on the electron beam charge was observed. The observed shortest wavelength of coherent transition radiation is less than 2.5 {mu}m . The debunching process of the microbunched electron beam was experimentally investigated. {copyright} {ital 1998} {ital The American Physical Society}
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- DOE Contract Number:
- AC02-76CH00016; FG03-92ER40695
- OSTI ID:
- 610753
- Journal Information:
- Physical Review Letters, Vol. 80, Issue 20; Other Information: PBD: May 1998
- Country of Publication:
- United States
- Language:
- English
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