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U.S. Department of Energy
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Gyrotron electromagnetic wiggler for a compact free electron laser

Technical Report ·
OSTI ID:5871355

We have demonstrated a novel, high power ({ge}1 MW), short wavelength (2 mm) gyrotron electromagnetic (GEM) wiggler for use in a compact free electron laser (FEL). The gyrotron consisted of an electron gun and resonator section followed by a special high Q cavity for storing the power created in the gyrotron resonator. The electromagnetic field stored in the high Q cavity would then be appropriate for use as a wiggler field in an infrared or visible FEL with a moderate energy (4 to 10 MeV) electron beam. The gyrotron experiment tested the practical limits due to ohmic loss, mode conversion, etc. on the strength of such a stored field. It also tested the effect of strong feedback from the high Q cavity back onto the gyrotron resonator. The proposed research utilized the technology of high power, high frequency gyrotrons developed at M.I.T. as part of the Department of Energy program on development of sources for plasma heating.

Research Organization:
Massachusetts Inst. of Tech., Cambridge, MA (United States). Plasma Fusion Center
Sponsoring Organization:
DOE; USDOE, Washington, DC (United States)
DOE Contract Number:
AC03-86SF16498
OSTI ID:
5871355
Report Number(s):
DOE/SF/16498-T1; ON: DE92005545
Country of Publication:
United States
Language:
English