Electron cyclotron absorption and emission: Vexatae Questiones''

Conference · Sat Oct 15 04:00:00 EDT 1994 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:6836408

Bornatici, M ^[1]; Engelmann, F ^[2]

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1. University of Ferrara, Ferrara (Italy) University of Pavia, Pavia (Italy)
2. The NET Team, c/o Max-Planck-Institut fuer Plasmaphysik, Garching (Germany)

The salinet features of the theory of electron cyclotron absorption and emission for the parameter range for which the radiation spectrum has a line structure are touched upon and contrasted with erroneous results of a recent paper by Arunasalam [Phys. Fluids [bold B] [bold 4], 1643 (1992)]. In particular, (i) the crucial role of the thermal effects on the mode polarization, which in turn affects the absorption profile around the fundamental frequency, is emphasized, showing that using a Trubnikov O-mode factor'' as advocated by Arunasalam is not correct; (ii) the profile of the absorption around the fundamental frequency results to be single-humped in all cases, in contrast to Arunasalam's assertion that the absorption profile of the first harmonic O-mode is double-humped; (iii) an expression for the local radiation temperature for a bi-Maxwellian electron distribution obtained by Arunasalam and upon which the analysis of the emission spectra of supershot plasmas in TFTR has been based [G. Taylor [ital et] [ital al]., Proceedings of the Eight Workshop on Electron Cyclotron (EC) Emission and EC Heating, Gut Ising, Germany (1992)] is shown not to be valid.

• OSTI ID: 6836408
• Report Number(s): CONF-9304112--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 289:1
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700350* -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
ABSORPTION
BREMSSTRAHLUNG
CYCLOTRON RADIATION
ECR HEATING
ELECTROMAGNETIC RADIATION
ELECTRON DENSITY
ELECTRON TEMPERATURE
EMISSION SPECTRA
HEATING
HIGH-FREQUENCY HEATING
PLASMA
PLASMA HEATING
POLARIZATION
RADIATIONS
SORPTION
SPECTRA
TEMPERATURE DEPENDENCE