Far-infrared fusion plasma diagnostics. Task IIIA. Final report

Technical Report · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5410466

Luhmann, Jr, N C

The Task IIIA program at UCLA has been concerned with the development of innovative yet practical plasma diagnostic systems capable of providing detailed information essential to the success of the fusion program but not presently available within the fusion community. Historically, this has involved an initial development in the laboratory, followed by a test of feasibility on the Microtor tokamak prior to transfer of the technique/instrument to main line fusion devices. Strong emphasis has been placed upon the far-infrared (FIR) spectral region where novel diagnostic systems and technology have been developed and then distributed throughout the fusion program. The major diagnostics under development have been the measurement of plasma microturbulence and coherent modes via multichannel cw collective Thomson scattering, and the application of phase/polarization imaging techniques to provide accurate and detailed (>20 channel) electron density and current profiles not presently available using conventional methods. The eventual transfer of the above techniques to main line fusion devices is, of course, a major goal of the UCLA development program. The multichannel scattering development at UCLA was efficiently transferred to TEXT a few years ago. The apparatus has been employed to investigate the strong spectral and spatial asymmetries in the microturbulence uncovered through the unique multichannel and spatial scanning capabilities of the system. The scattering apparatus has also produced evidence for the ion pressure gradient driven eta/sub i/ modes thought responsible for anomalous transport in the edge regions of tokamak plasmas, as well as providing insight into the wave-wave coupling processes between various plasma modes.

• Research Organization: California Univ., Los Angeles (USA). Dept. of Electrical Engineering
• DOE Contract Number: AC03-76ET53019
• OSTI ID: 5410466
• Report Number(s): PPG-1002; ON: DE86015361
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
DIAGNOSTIC TECHNIQUES
ELECTROMAGNETIC RADIATION
FAR INFRARED RADIATION
INELASTIC SCATTERING
INFRARED RADIATION
PLASMA DIAGNOSTICS
POLARIZATION
RADIATIONS
RESEARCH PROGRAMS
SCATTERING
THOMSON SCATTERING
TURBULENCE