Tokamak plasma wave studies via multi-channel far-infrared laser scattering

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6102145

Park, H K

The development and application of the first multichannel far-infrared (FIR) laser scattering apparatus are described together with a novel acousto-optic calibration technique. The apparatus provides, for the first time, the capability of measuring wave dispersion during a single tokamak discharge. As a first application, the apparatus was employed in the study of low frequency microturbulence. The results demonstrated the need for single shot dispersion acquisition capability and produced the first known observation of microturbulence dispersion in a tokamak plasma. This observed dispersion was interpreted as resulting from a combination of drift wave turbulence and bulk plasma rotation. A second application area is the study of ICRF waves. In particular, the determination of plasma parameters, such as ion temperature, by measurement of wave dispersion (e.g. ion Bernstein wave) during a single tokamak discharge represented the prime goal of this thesis. This resulted in a series of theoretical and experimental studies culminating in the first successful excitation and identification of mode converted ion Bernstein waves in a pure hydrogen tokamak plasma.

• Research Organization: California Univ., Los Angeles (USA)
• OSTI ID: 6102145
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
700200 -- Fusion Energy-- Fusion Power Plant Technology
CLOSED PLASMA DEVICES
DISPERSION RELATIONS
ELECTROMAGNETIC RADIATION
FAR INFRARED RADIATION
HEATING
HIGH-FREQUENCY HEATING
ICR HEATING
INFRARED RADIATION
ION TEMPERATURE
LASER RADIATION
PLASMA HEATING
PLASMA WAVES
RADIATIONS
SCATTERING
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TURBULENCE