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Proceedings Paper

Nanosecond response time detectors for millimetre wave FELs
Author(s): M. F. Kimmitt
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Paper 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 4µs 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.

Paper Details

Date Published: 30 August 1993
PDF: 2 pages
Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21041P (30 August 1993); doi: 10.1117/12.2298493
Show Author Affiliations
M. F. Kimmitt, Univ. of Essex (United Kingdom)

Published in SPIE Proceedings Vol. 2104:
18th International Conference on Infrared and Millimeter Waves
James R. Birch; Terence J. Parker, Editor(s)

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