Multichannel scattering studies of the spectra and spatial distribution of tokamak microturbulence

Journal Article · Mon Feb 18 04:00:00 EST 1985 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.54.689· OSTI ID:6085483

Brower, D L; Peebles, W A; Luhmann, Jr, N C; Savage, Jr, R L

Detailed studies of low-frequency microturbulence are presented. We utilize a unique multichannel far-infrared (lambda = 1.22 mn) laser scattering system capable of measuring the entire S(k/sub perpendicular/,..omega..) spectrum during a single tokamak discharge. A statistical dispersion is unfolded for k/sub theta/ which exhibits a phase velocity approx. =3v/sub D/e at low k/sub theta/ with a distinct rolloff for k/sub theta/> or =9 cm/sup -1/. In addition, a strong spatial asymmetry is observed in the k/sub theta/ density fluctuation distribution which reverses with toroidal current direction.

• Research Organization: University of California, Los Angeles, California 90024
• DOE Contract Number: AC05-78ET53043
• OSTI ID: 6085483
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 54:7; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
ASYMMETRY
CLOSED PLASMA DEVICES
DATA
DISPERSION RELATIONS
ELECTRIC DISCHARGES
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
FAR INFRARED RADIATION
FLUCTUATIONS
INFORMATION
INFRARED RADIATION
LASER RADIATION
LIGHT SCATTERING
MULTIPLE SCATTERING
NUMERICAL DATA
PHASE VELOCITY
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
RADIATIONS
SCATTERING
TEXT DEVICES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TURBULENCE
VARIATIONS
VELOCITY