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Proceedings Paper

High speed diagnostic study of pulsed, cold cathode, gyrotrons
Author(s): K. Ronald
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Paper Abstract

Results are reported of plasma formation in the diode of a pulsed cold-cathode gyrotron. Streakphotography has been used to provide direct evidence of certain aspects of the plasma behaviour. Whencoupled to measurements of the simultaneous millimetre wave output of the gyrotron and the collapsingelectrical impedance of the diode gap, these experiments demonstrate the role of the plasma interminating the millimetre wave output pulse. Complementary experiments have used high speedframing photography to observe the spatial distribution of the cathode 'hot spots' as a function of theinsulating magnetic field strength, during the low voltage arc discharge, subsequent to the terminationof the gyrotron output. These diagnostic techniques have been applied to investigate the suitability ofdifferent cathode materials as plasma flare sources for high power gyrotron oscillators.

Paper Details

Date Published: 30 August 1993
PDF: 2 pages
Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21046F (30 August 1993); doi: 10.1117/12.2298663
Show Author Affiliations
K. Ronald, Univ. of Strathclyde (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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