Predicted performance of a dc beam driven FEM oscillator designed for fusion applications at 200-250 GHz

Conference · Fri Aug 21 04:00:00 EDT 1992

OSTI ID:10157372

Caplan, M ^[1]; Best, R W.B.; Verhoeven, A G.A.; van der Wiel, M J; Urbanus, W H ^[2]; Bratman, V L; Denisov, G G ^[3]

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1. Lawrence Livermore National Lab., CA (United States)
2. Associatie Euratom-FOM, Nieuwegein (Netherlands). FOM-Instituut voor Plasmafysica
3. Institute of Applied Physics, Uljanova Ulitsa 46, 6036000 Nizhniy Novgorod (Russian Federation)

A Free Electron Laser using a DC beam with depressed collector is being developed at the FOM Institute (Netherlands) for plasma heating which will be capable of producing 1 MW CW output over an adjustable tuning range of 200-250 GHz. The basic design parameters for the electron beam, undulator and waveguide circuit are determined using a 3D non-wiggle averaged waveguide mode particle interaction code including AC space charge effects. Novel features of the design include using a step tapered two section wiggler to achieve both the high gain (10) and the required efficiency ({approximately}5%) as well as a rectangular corrugated HE{sub ll} waveguide circuit to handle the high average power requirements. Results are presented on FEM performance including dependence on beam emittance, percent feedback, and operating frequency.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10157372
• Report Number(s): UCRL-JC--111690; CONF-9208142--22; ON: DE93013414
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700460
COMPUTERIZED SIMULATION
DESIGN
EQUATIONS OF MOTION
FREE ELECTRON LASERS
FUELS
HEATING AND FUELING SYSTEMS
MICROWAVE AMPLIFIERS
PERFORMANCE
PLASMA HEATING
WAVEGUIDES
WIGGLER MAGNETS