EXPERIMENTAL-STUDY OF HIGH-POWER, SATURATED AMPLIFICATION IN A SHEET-BEAM, SMALL-PERIOD-WIGGLER FEL (WITH APPLICATIONS TO MAGNETIC FUSION-RESEARCH)

Authors
CHENG S GRANATSTEIN VL DESTLER WW LEVUSH B RODGERS J ANTONSEN TM
Citation
S. Cheng et al., EXPERIMENTAL-STUDY OF HIGH-POWER, SATURATED AMPLIFICATION IN A SHEET-BEAM, SMALL-PERIOD-WIGGLER FEL (WITH APPLICATIONS TO MAGNETIC FUSION-RESEARCH), Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 375(1-3), 1996, pp. 160-163
Citations number
15
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
375
Issue
1-3
Year of publication
1996
Pages
160 - 163
Database
ISI
SICI code
0168-9002(1996)375:1-3<160:EOHSAI>2.0.ZU;2-D
Abstract
The study of sheet-beam, small-period-wiggler FELs as candidate source s for heating magnetic fusion plasmas has achieved a major milestone. In a proof-of-principle, pulsed experiment, saturated FEL amplifier op eration was realized with 250 kW of output power at 86 GHz. Input micr owave power was 1 kW, beam voltage as 450 kV and beam current was 17 A . The planar wiggler had a peak value of 3.8 kV, a period of 0.96 cm a nd was 67 cm long. The linear gain of 30 dB, saturated gain of 24 dB a nd saturated efficiency of 3% are all in good agreement with theoretic al predictions for this FEL which operated in the Raman regime. Follow -on work would include development of a thermionic, sheet-beam, electr on gun compatible with CW FEL operation, and adding a section of taper ed wiggler to increase the output power and efficiency.