Experimental measurements of competition between fundamental and second harmonic emission in a quasi-optical gyrotron
A quasi-optical gyrotron (QOG) designed for operation at the fundamental (about 100 GHz) exhibits simultaneous emission at the fundamental and the second harmonic. For a beam current of 4 A, 20% of the total RF power is emitted at the second harmonic. The experimental measurements show that the excitation of the second harmonic is only possible when the fundamental is present. The frequency of the second harmonic is locked by the frequency of the fundamental. Experimental evidence shows that when the second harmonic is not excited, total efficiency is enhanced.
Bibliographic Reference: Report: LRP 402/90 EN (1990) 12 pp.
Availability: Available from Confédération Suisse, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, 21 avenue des Bains, 1007 Lausanne (CH)
Record Number: 199011088 / Last updated on: 1994-12-01
Original language: en
Available languages: en