Experimental development of a millimeter wave free electron laser
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Date
1990-12Author
Radack, D.
Bidwell, S.
Antonsen, T. Jr
Carmel, Y.
Destler, William
Granatstein, V.
Latham, P.
Levush, B.
Mayergoyz, I.
Rodgers, J.
Zhang, Z.
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A 1 MW (cw), millimeter wave FEL (X, « 0.5 mm) is currently under development with an application for heating
fusion plasmas. Two salient features of the FEL are the use of a short-period wiggler £w < 10 mm) electromagnet
and a mildly relativistic (Eieam < 1 MeV) sheet electron beam. The FEL has been designed to operate in the highgain
regime and uses a tapered wiggler. The wiggler provides beam focusing as well as the magnetostatic pump
wave. The effectiveness of wiggler focusing is being investigated. Planned experiments will address the critical issues
of beam interception and stable single-mode operation.
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