Abstract
Two phased antenna configurations for inertial-confinement RF (ICRF) heating have been studied in the central cell of the Phaedrus-B tandem mirror. In the first configuration, a pair of dual half-turn ICRF antennas space 1 m apart are driven with variable relative phase. Calculations of the ponderomotive force due to the radial electric fields of the eigenmode have shown that ponderomotive effects are sufficient to stabilize the plasma against curvature-driven MHD instabilities in this case, in good agreement with observations. In the second configuration, a pair of dual half-turn ICRF antennas spaced 7. 5 cm apart are driven with variable relative phase in a rotating field arrangement. Ion heating efficiency and slow magnetosonic wave excitation have been investigated as a function of the relative antenna phasing for this configuration.
Original language | English |
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Pages | 64 |
Number of pages | 1 |
State | Published - 1987 |