Localized magnetic field pitch angle measurements by collective Thomson scattering

A novel new method is proposed to measure the internal magnetic field pitch angle in tokamaks by measuring the frequency of the lower hybrid resonance in the collective Thomson scattered spectrum. The resonance frequency has a dependence of 1.2 and 2.0 GHz/deg pitch angle for ITER and C‐MOD‐like pla...

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Bibliographic Details
Published in:Review of Scientific Instruments 1992-10, Vol.63 (10), p.4641-4643
Main Authors: Woskov, P., Rhee, D. Y.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320 - Plasma Diagnostic Techniques & Instrumentation- (1992-)
CLOSED PLASMA DEVICES
ELECTRON DENSITY
ELECTRON TEMPERATURE
Exact sciences and technology
HYBRID RESONANCE
INELASTIC SCATTERING
MAGNETIC FIELD CONFIGURATIONS
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma diagnostic techniques and instrumentation
PLASMA DIAGNOSTICS
RESONANCE
SCATTERING
THERMONUCLEAR DEVICES
THOMSON SCATTERING
TOKAMAK DEVICES
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Summary:A novel new method is proposed to measure the internal magnetic field pitch angle in tokamaks by measuring the frequency of the lower hybrid resonance in the collective Thomson scattered spectrum. The resonance frequency has a dependence of 1.2 and 2.0 GHz/deg pitch angle for ITER and C‐MOD‐like plasma parameters, respectively, using a submillimeter‐wave diagnostic source. Sensitivity to other plasma parameters such as electron density, temperature, energetic ion fraction, and magnetic field is shown to be weak.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1143645