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An improved X-band relativistic triaxial klystron amplifier with active suppression of asymmetric TM mode self-excitation.
- Source :
-
AIP Advances . Nov2020, Vol. 10 Issue 11, p1-8. 8p. - Publication Year :
- 2020
-
Abstract
- The self-excitation of asymmetric modes is one of the main factors limiting the long-pulse operation of the relativistic triaxial klystron amplifier (TKA). Research studies have revealed that the asymmetric TM modes with negative beam loading conductance (Ge/G0) in the bunching cavities are the main culprits of self-excitation. The existing studies focus on passively destroying the growth of asymmetric TM modes, but we attempt to actively suppress their self-excitation in this paper. Investigation results demonstrate that the employment of single-gap bunching cavities can significantly reduce the risk of self-excitation of asymmetric TM modes, as the Ge/G0 of asymmetric TMn11 modes in single period structures are positive. The current modulation capacity of a single-gap bunching cavity, however, is not sufficient, so a cascade structure consisting of two groups of bunching cavities is employed to compensate for this deficiency. Based on the above conclusions, an X-band TKA device with four single-gap beam–wave interaction cavities is proposed and investigated in this paper. The three-dimensional particle-in-cell simulation results demonstrate that there is no self-excitation of asymmetric modes in the proposed X-band TKA device. [ABSTRACT FROM AUTHOR]
- Subjects :
- *KLYSTRONS
*GYROTRONS
*EMPLOYMENT
Subjects
Details
- Language :
- English
- ISSN :
- 21583226
- Volume :
- 10
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- AIP Advances
- Publication Type :
- Academic Journal
- Accession number :
- 147300885
- Full Text :
- https://doi.org/10.1063/5.0022255