100 eV electron temperatures in the Maryland centrifugal experiment observed using electron Bernstein emission

Thermal electron Bernstein emission has been observed at the second harmonic of the electron cyclotron frequency at the mid-plane of the Maryland Centrifugal eXperiment. The emission is received in the X-mode polarization and coupled to the Bernstein wave by the B-X mode conversion process. The aver...

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Bibliographic Details
Published in:Physics of plasmas 2014-06, Vol.21 (6)
Main Authors: Reid, R. R., Romero-Talamás, C. A., Young, W. C., Ellis, R. F., Hassam, A. B.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
APPROXIMATIONS
BERNSTEIN MODE
Bernstein waves
CONFINEMENT TIME
Coupled modes
CYCLOTRON FREQUENCY
Cyclotrons
Electron energy
ELECTRON TEMPERATURE
ELECTRONS
EMISSION
EV RANGE 10-100
ION TEMPERATURE
MODE CONVERSION
Plasma physics
PLASMA WAVES
ROTATING PLASMA
Rotating plasmas
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Summary:Thermal electron Bernstein emission has been observed at the second harmonic of the electron cyclotron frequency at the mid-plane of the Maryland Centrifugal eXperiment. The emission is received in the X-mode polarization and coupled to the Bernstein wave by the B-X mode conversion process. The average B-X coupling efficiency is approximately 20%. The observed emission indicates thermal electron temperatures an excess of 100 eV in the core of the rotating plasma. The measured electron temperature is consistent with recent ion temperature measurements and indicates that the total energy confinement time exceeds 500 μs.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4883499