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Numerical research on a 4 MW 170 GHz coaxial gyrotron with a double electron beam.
- Source :
-
Physics of Plasmas . Jan2019, Vol. 26 Issue 1, pN.PAG-N.PAG. 9p. 2 Diagrams, 3 Charts, 7 Graphs. - Publication Year :
- 2019
-
Abstract
- In this paper, a coaxial gyrotron with a double electron beam is investigated on the ohmic loss, starting current, mode competition, and beam wave interaction. Its beam-wave interaction equation and dependence of the starting current on the static magnetic field and parameter K (the ratio of the current of an electron beam to the total current of a double electron beam) are given. On this basis, a 4 MW 170 GHz coaxial gyrotron with a double electron beam is studied. By the numerical calculation, the influence of K on the starting current is analyzed under a given static magnetic field and at different guiding center radii of the double electron beam. Studies show that the ability of the gyrotron to suppress the mode competition has a relation with the selection of the guiding center radii of the two electron beams. Then, the investigation of a time-dependent multi-mode competition of the gyrotron is performed, which shows that the gyrotron can stably operate in the T E 38 , 18 − mode. The results show that by considering the ohmic loss, the gyrotron can operate at 170.4 GHz with the output power of 4.04 MW and the beam-wave interaction efficiency of 35.47% when B = 6.82 T, U = 88 KV, I = 129 A, and K = 0.4. Each of the two electron beams in the gyrotron has different beam-wave interaction efficiencies. Compared to the coaxial gyrotron with one electron beam, the beam-wave interaction efficiency of each electron beam in the coaxial gyrotron with a double electron beam has a different increase. [ABSTRACT FROM AUTHOR]
- Subjects :
- *GYROTRONS
*ELECTRON beams
*OHMIC resistance
*NUMERICAL analysis
*MAGNETIC fields
Subjects
Details
- Language :
- English
- ISSN :
- 1070664X
- Volume :
- 26
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Physics of Plasmas
- Publication Type :
- Academic Journal
- Accession number :
- 134425466
- Full Text :
- https://doi.org/10.1063/1.5053637