Millimeter wave free electron laser amplifiers: Experiments and designs

Show simple item record Bidwell, S. Zhang, Z. Antonsen, T. Jr Bensen, D. Destler, William Freund, H. Granatstein, V. Latham, P. Levush, B. Radack, D. Rodgers, J. 2009-07-15T20:04:19Z 2009-07-15T20:04:19Z 1991-08
dc.identifier.citation 16th International Conference on Infrared and Millimeter Waves, Lausanne, Switzerland, August 26-30, 1991 en_US
dc.description.abstract Free electron laser amplifiers are investigated as sources of high average-power (1 MW) millimeter to submillimeter wave radiation (200-600 GHz) for application to electron cyclotron resonance heating of magnetically confined fusion plasmas. As a stepping-stone to higher frequencies and cw operation a pulsed amplifier ((tau)(sub pulse) approx. equal to 80 nano-s) at 98 GHz is being developed. Status is reported on this experiment which investigates linear gain amplification with use of sheet electron beam (transverse cross section = 0.1 x 2.0 cm, V(sub beam) = 440 keV, I(sub beam) approx. equal to 10 A) and short-period wiggler ((ell)(sub w) = 0.96 cm) and with expected output of 140 W. Predictions of gain and efficiency from a 1-D universal formulation are presented. Beam propagation results, with wiggler focusing as a means of sheet beam confinement in both transverse dimensions, through the 54 cm (56 period) pulsed electromagnet wiggler are discussed. Peak wiggler fields of 5.1 kG on-axis have been achieved. en_US
dc.language.iso en_US en_US
dc.title Millimeter wave free electron laser amplifiers: Experiments and designs en_US
dc.type Proceedings en_US

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