Measurement of magnetic fluctuations of electromagnetic plasma waves by cross-polarization scattering

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1147905· OSTI ID:451777

Mase, A; Bruskin, L G; Oyama, N; Tokuzawa, T; Inutake, H; Itakura, A; Yokoi, M; Hojo, H; Ichimura, M; Tamano, T ^[1]

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1. Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305 (Japan)

The cross-polarization scattering (CPS) technique was applied to the GAMMA 10 tandem mirror for measurements of internal magnetic fluctuations associated with waves in the ion cyclotron range of frequency. The CPS is related to the mode-conversion effect consisting of a polarization difference of a scattered wave with regard to an incident wave. In GAMMA 10, the incident ordinary (extraordinary) wave is transferred to the extraordinary (ordinary) wave by magnetic field fluctuations near the cutoff layer of a plasma. The transferred wave penetrates through the cutoff layer and is detected. The frequency spectra and density and magnetic field fluctuations of the waves are evaluated from the CPS diagnostic and reflectometry. The ratio of the magnetic field to density fluctuation level depends on the phase velocity of the slow Alfv{acute e}n wave. The CPS data are also compared with those obtained from magnetic probes. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 451777
• Report Number(s): CONF-960543--
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 68; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
FLUCTUATIONS
GAMMA 10 DEVICES
HYDROMAGNETIC WAVES
ICR HEATING
MAGNETIC FIELDS
MICROWAVE RADIATION
MODE CONVERSION
PLASMA DIAGNOSTICS
PLASMA WAVES
POLARIZATION
REFLECTION
swept-frequency reflectometry