Nanosecond response time detectors for millimetre wave FELs

M. F. Kimmitt

doi:10.1117/12.2298493

30 August 1993 Nanosecond response time detectors for millimetre wave FELs

M. F. Kimmitt

Proceedings Volume 2104, 18th International Conference on Infrared and Millimeter Waves; 21041P (1993) https://doi.org/10.1117/12.2298493
Event: 18th International Conference on Infrared and Millimeter Waves, 1993, Colchester, United Kingdom

Abstract

The pulse structure of the output of a typical free-electron laser (FEL) is shown in Fig 1. Wehave recently reported the operation of a compact waveguide FEL for the millimetre-wave region [1]with an average output power of up to 1kW, in a macropulse 4Ã‚Âµs long which is repeated at amaximum frequency of 40Hz. The laser is driven by an S band (3GHz) microtron deliveringelectron pulses of 15ps duration spaced by 330ps and this results in the micropulse structure shownin Fig 1. However, the dispersion of the waveguide and the frequency selectivity of the resonatorleads to a micropulse duration of -400ps. The present output of the FEL is between 2.1 and 2.6mmbut a new laser is under construction, designed to extend the wavelength range down to 500 tim.

Citation Download Citation

M. F. Kimmitt "Nanosecond response time detectors for millimetre wave FELs", Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21041P (30 August 1993); https://doi.org/10.1117/12.2298493

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