Single-mode operation of a Bragg free-electron maser oscillator

Journal Article · Mon Apr 11 04:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.72.2391· OSTI ID:5031426

Chu, T S; Hartemann, F V; Danly, B G; Temkin, R J ^[1]

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1. Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

Detailed studies of the spectral characteristics and spatial mode structure of a single-mode, high-power Raman free-electron maser (FEM) oscillator operating with a Bragg resonator are reported. The FEM oscillator generated approximately 1 MW of microwave power in a single axial mode at 27.47 GHz, with an electron beam energy of 320 keV and a transmitted current of 30 A, yielding an efficiency of 10.3%, in good agreement with nonlinear simulations. These results indicate that a Raman free-electron maser can operate at high power and efficiency with stable single-mode output in the long pulse (equilibrium) regime.

• DOE Contract Number: FG02-89ER14052
• OSTI ID: 5031426
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:15; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
AMPLIFIERS
COMPARATIVE EVALUATIONS
DATA
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
EVALUATION
EXPERIMENTAL DATA
FREE ELECTRON LASERS
FREQUENCY RANGE
GHZ RANGE
GHZ RANGE 01-100
HEATING
INFORMATION
LASERS
MASERS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
MICROWAVE RADIATION
NUMERICAL DATA
PLASMA HEATING
RADIATIONS
RAMAN EFFECT
RESONATORS
TUNING