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Title: Novel linear analysis for a gyrotron oscillator based on a spectral approach

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.

Authors:
; ; ; ; ; ; ;
Publication Date:
DOE Contract Number:  
FC02-93ER54186
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1880628
DOI:
https://doi.org/10.7910/DVN/GARLA6

Citation Formats

Genoud, J., Tran, T. M., Alberti, S., Braunmueller, F., Hogge, J.-Ph., Tran, M. Q., Guss, W. C., and Temkin, R. J. Novel linear analysis for a gyrotron oscillator based on a spectral approach. United States: N. p., 2019. Web. doi:10.7910/DVN/GARLA6.
Genoud, J., Tran, T. M., Alberti, S., Braunmueller, F., Hogge, J.-Ph., Tran, M. Q., Guss, W. C., & Temkin, R. J. Novel linear analysis for a gyrotron oscillator based on a spectral approach. United States. doi:https://doi.org/10.7910/DVN/GARLA6
Genoud, J., Tran, T. M., Alberti, S., Braunmueller, F., Hogge, J.-Ph., Tran, M. Q., Guss, W. C., and Temkin, R. J. 2019. "Novel linear analysis for a gyrotron oscillator based on a spectral approach". United States. doi:https://doi.org/10.7910/DVN/GARLA6. https://www.osti.gov/servlets/purl/1880628. Pub date:Mon Jan 07 00:00:00 EST 2019
@article{osti_1880628,
title = {Novel linear analysis for a gyrotron oscillator based on a spectral approach},
author = {Genoud, J. and Tran, T. M. and Alberti, S. and Braunmueller, F. and Hogge, J.-Ph. and Tran, M. Q. and Guss, W. C. and Temkin, R. J.},
abstractNote = {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.},
doi = {10.7910/DVN/GARLA6},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {1}
}

Works referencing / citing this record:

Novel linear analysis for a gyrotron oscillator based on a spectral approach
journal, April 2016