Tokamak ion temperature determination via cw far-infrared laser scattering

Journal Article · Wed May 01 04:00:00 EDT 1985 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1138043· OSTI ID:5761274

Park, H; Lee, P S; Peebles, W S; Luhmann, Jr, N C

A successful proof-of-principle experimental determination of ion temperature in a tokamak plasma via cw far-infrared (FIR) collective laser scattering from ion Bernstein waves is reported. The Bernstein waves are excited via mode conversion of an externally launched fast Alfven wave at the second-harmonic cyclotron layer. A fit of the experimentally determined ion Bernstein wave dispersion to the temperature-dependent theoretical dispersion yields the local ion temperature. Partial ion temperature profiles (chord averaged) have been obtained with temperature values consistent with charge exchange measurements. Single-shot measurements should be available in the near future with the use of the multichannel scattering systems and high-power laser sources developed at UCLA.

• Research Organization: University of California, Los Angeles, California 90024
• OSTI ID: 5761274
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 56:5; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ALFVEN WAVES
CLOSED PLASMA DEVICES
DATA
DISPERSION RELATIONS
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
FAR INFRARED RADIATION
FEASIBILITY STUDIES
HARMONICS
HYDROMAGNETIC WAVES
INELASTIC SCATTERING
INFORMATION
INFRARED RADIATION
ION TEMPERATURE
ION WAVES
LASER RADIATION
LIGHT SCATTERING
NUMERICAL DATA
OSCILLATIONS
PLASMA DIAGNOSTICS
PLASMA WAVES
RADIATIONS
SCATTERING
THERMONUCLEAR DEVICES
THOMSON SCATTERING
TOKAMAK DEVICES