Using perpendicular electron cyclotron emission to diagnose the thermal-barrier electrons in a tandem mirror
1985; IOP Publishing; Volume: 25; Issue: 1 Linguagem: Inglês
10.1088/0029-5515/25/1/004
ISSN1741-4326
Autores Tópico(s)Laser-Plasma Interactions and Diagnostics
ResumoPossibilities are explored for diagnosing the hot-electron distribution function of the thermal barriers of tandem mirrors, using perpendicular electron cyclotron emission. Emission from a relativistic bi-Maxwellian with a loss cone is calculated in the single-particle limit. Formulae are derived for finding T⊥ by measuring frequencies of the harmonio intensity maxima at optically thin frequencies, or the intensity at optically thick frequencies. A positive δf/δp⊥ in the distribution function is shown to lead to decreased absorption and instability for low T⊥. Finally, the perpendicular source function is calculated in the single-particle limit for this distribution function.
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