Investigation of the gyrotron oscillator as a nonlinear electrodynamical system

K. R. Chu, S. H. Chen, T. H. Chan, K. F. Paol, C. T. Fan

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The electron cyclotron maser (ECM) is an intriguing electrodynamical system characterized by nonlinear field contraction and other unconventional behavior. We report recent physics investigations of this class of radiation mechanisms, both in theory and in experiment [1,2]. Results indicate highly current-sensitive field profiles and hence sharply contrasting linear and saturated behavior. Transition from the stationary state to a sequence of nonstationary states in resonantor-based oscillations is experimentally characterized for the first time. By contrast, we have also demonstrated the stationary operation of backward-wave oscillations at a beam current far in excess of the generally predicted nonstationary threshold. This difference in nonlinear behavior is shown to be fundamental through a comparative analysis of the feedback mechanisms, energy deposition profiles, and field shaping processes involved in these two types of oscillations.

Original languageEnglish
Title of host publication4th IEEE International Vacuum Electronics Conference, IVEC 2003 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages379
Number of pages1
ISBN (Electronic)0780376994, 9780780376991
DOIs
StatePublished - 2003
Event4th IEEE International Vacuum Electronics Conference, IVEC 2003 - Seoul, Korea, Republic of
Duration: 28 May 200330 May 2003

Publication series

Name4th IEEE International Vacuum Electronics Conference, IVEC 2003 - Proceedings

Conference

Conference4th IEEE International Vacuum Electronics Conference, IVEC 2003
Country/TerritoryKorea, Republic of
CitySeoul
Period28/05/0330/05/03

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