Novel linear analysis for a gyrotron oscillator based on a spectral approach
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Novel linear.pdf
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Author(s)
Genoud, J.
Tran, T. M.
Alberti, S.
Braunmueller, F.
Hogge, J.-Ph.
Tran, M. Q.
Tax, David Samuel
Guss, William C
Temkin, Richard J
Date Issued
April 2016
Journal
Physics of Plasmas
Publisher
American Institute of Physics (AIP)
Citation
Genoud, J. et al. “Novel Linear Analysis for a Gyrotron Oscillator Based on a Spectral Approach.” Physics of Plasmas 23, 4 (April 2016): 043101 © 2016 EURATOM
Version
Author's final manuscript
Abstract
With the aim of gaining a better physical insight into linear regimes in gyrotrons, a new linear model was developed. This model is based on a spectral approach for solving the self-consistent system of equations describing the wave-particle interaction in the cavity of a gyrotron oscillator. Taking into account the wall-losses self-consistently and including the main system inhomogeneities in the cavity geometry and in the magnetic field, the model is appropriate to consider real system parameters. The main advantage of the spectral approach, compared with a time-dependent approach, is the possibility to describe all of the stable and unstable modes, respectively, with negative and positive growth rates. This permits to reveal the existence of a new set of eigenmodes, in addition to the usual eigenmodes issued from cold-cavity modes. The proposed model can be used for studying other instabilities such as, for instance, backward waves potentially excited in gyrotron beam tunnels.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.4945611
