1 October 1991 Millimeter wave free electron laser amplifiers: experiments and designs
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Proceedings Volume 1576, 16th International Conference on Infrared and Millimeter Waves; 15766P (1991) https://doi.org/10.1117/12.2297954
Event: 16th International Conference on Infrared and Millimeter Waves, 1991, Lausanne, Switzerland
Abstract
Free electron laser amplifiers are investigated as sources of high-average-power (1 MW) millimeter to submillimeter wave radiation (200 GHz - 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 (τpulse ≃ 80 ns) at 98 GHz is being developed. Status is reported on this experiment which investigates linear gain amplification with use of a sheet electron beam (transverse cross section = 0.1 cm × 2.0 cm, Vbeam = 440 keV, Ibeam ≃ 10 A) and short-period wiggler (lw = 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.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. W. Bidwell, S. W. Bidwell, } "Millimeter wave free electron laser amplifiers: experiments and designs", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15766P (1 October 1991); doi: 10.1117/12.2297954; https://doi.org/10.1117/12.2297954
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