Whistler-pumped free electron laser

Journal Article · Tue Nov 01 04:00:00 EST 1988 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.866902· OSTI ID:6808583

Sharma, A; Tripathi, V K

A relativistic electron beam in the presence of a whistler wave excites a negative-energy beam space charge mode and a high frequency laser radiation (..omega../sub 1/>>..omega../sub c/). The instability is explosive for a copropagating beam and the whistler pump, resulting in the excitation of an intense laser in a short pulse. The explosion time tau = /(4/kv/sub 0/)((..omega../sub 1/-k/sub 1/v/sub b/-..omega../sub c/) ..gamma../sub 0/..omega../sub 1//(..omega../sub 1/-k/sub 1/v/sub b/)..omega../sup '//sub p//sub b/)/sup 1//sup ///sup 2//. For both the counterpropagating beam and the whistler wave, the instability is nonexplosive. The laser frequency in this case is somewhat larger, whereas the exponentiation time is comparable to the explosion time of the earlier case.

• Research Organization: Physics Department, Indian Institute of Technology, New Delhi 110016, India
• OSTI ID: 6808583
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 31:11; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
BEAMS
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ENERGY RANGE
EXPLOSIVE INSTABILITY
FREE ELECTRON LASERS
INSTABILITY
LASERS
LEPTON BEAMS
NOISE
OPTICAL PUMPING
PARTICLE BEAMS
PLASMA
PLASMA INSTABILITY
PULSES
PUMPING
RADIATIONS
RADIO NOISE
RADIOWAVE RADIATION
RELATIVISTIC RANGE
SPACE CHARGE
WHISTLERS