Effect of trapped electrons on gyrotron efficiency

M. I. Airila, O. Dumbrajs

Research output: Contribution to journalArticle in a proceedings journalScientificpeer-review


The effect of electron trapping in the presence of a depressed collector has been included in gyrotron efficiency computations. A condition for trapping is derived in terms of the retarding voltage. Electron reflection is treated both as an ideal adiabatic process and a non-adiabatic one to find limits for realistic cases. The overall electron efficiency as a function of the retarding voltage has been calculated for two specific gyrotrons with allowance for the electron velocity spread. The collector voltages corresponding to the onset of trapping are specified and the resulting efficiency decrease is found.

Original languageEnglish
Pages (from-to)183-188
Number of pages6
Issue number165
Publication statusPublished - 1 Jan 2001
MoE publication typeA4 Article in a conference publication
Event9th Trienal Conference of ITG-Chapter 8.6 -Vacuum Electronics and Displays - Garmisch-Partenkirchen, Germany
Duration: 2 May 20013 May 2001


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