Further experiments on a wiggler-focused sheet electron beam small period free electron laser amplifier
- Univ. of Maryland, College Park, MD (United States)
The first operation of a free electron laser amplifier with a small period wiggler and a sheet electron beam has been successfully demonstrated, and up to 15--17 dB gain was achieved at 94 GHz with 56 periods of uniform wiggler at an input RF power level of several Watts. Further studies on this device have been performed at an input microwave power level of {approximately} 1 kw at a frequency of 85 GHz. Preliminary results of these experiments are presented. Experimental results will be compared with theoretical predictions from a one-dimensional simulation, code. Nonlinear saturation characteristics of this novel free electron laser amplifier will be discussed based on the experimental results. Theoretical analysis and numerical simulations show that a longer uniform wiggler is needed for the free electron laser amplifier to be driven into saturation. For this purpose, another 18 period section of uniform wiggler has been fabricated, which will be attached to the existing 56 period wiggler. Results of wiggler magnetic field measurements and studies of electron beam propagation through this newly fabricated wiggler will also be presented.
- OSTI ID:
- 51790
- Report Number(s):
- CONF-940604--; ISBN 0-7803-2006-9
- Country of Publication:
- United States
- Language:
- English
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