Measurements of amplification and phase shift (wave refractive index) in a free-electron laser

Journal Article · Wed Oct 01 00:00:00 EDT 1986 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.865811· OSTI ID:5226533

Fajans, J; Bekefi, G

Measurements of the amplification and phase shifts (wave refractive index) in a free-electron laser (FEL) are reported. The studies have been carried out at microwave frequencies (7-16 GHz) in a free-electron laser operating in the collective (Raman) regime, using a mildly relativistic electron beam with energy of --160 keV, and current of --5 A. The observations are found to be in excellent agreement with theoretical predictions based on the full three-dimensional FEL dispersion relation.

• Research Organization: Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
• OSTI ID: 5226533
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 29:10; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ACCURACY
AMPLIFICATION
BEAMS
COHERENT RADIATION
CORRELATIONS
DISPERSION RELATIONS
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ENERGY RANGE
FREE ELECTRON LASERS
FREQUENCY RANGE
GAIN
GHZ RANGE
GHZ RANGE 01-100
KEV RANGE
KEV RANGE 100-1000
LASERS
LEPTON BEAMS
MICROWAVE RADIATION
OPERATION
PARTICLE BEAMS
PHASE SHIFT
RADIATIONS
RAMAN EFFECT