Soft-x-ray tomography of sawtooth oscillations in the JIPP T-II tokamak

Journal Article · Mon Oct 17 00:00:00 EDT 1988 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.61.1839· OSTI ID:6793820

Nagayama, Y; Tsuji, S; Kawahata, K

Time evolutions of the soft-x-ray tomography of a tokamak plasma have been obtained during sawtooth oscillations by use of the Fourier-Bessel expansion technique. The colder plasma is carried to the center by a hydrodynamic flow, and becomes a new hot spot during the crash phase. The old hot core is pushed out and the new hot spot remains at the center after the crash. The observed sawtooth crash is consistent with neither the Kadomtsev model nor the Wesson model. The crash time is shorter as the current profile is broader.

• Research Organization: Department of Physics, Faculty of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113, Japan
• OSTI ID: 6793820
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 61:16; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
BESSEL FUNCTIONS
CLOSED PLASMA DEVICES
COLD PLASMA
DIAGNOSTIC TECHNIQUES
ELECTRIC DISCHARGES
ELECTROMAGNETIC RADIATION
FLUID MECHANICS
FOURIER ANALYSIS
FUNCTIONS
HOT PLASMA
HYDRODYNAMICS
IONIZING RADIATIONS
MECHANICS
OSCILLATIONS
PLASMA
RADIATIONS
SOFT X RADIATION
THERMONUCLEAR DEVICES
TIME DEPENDENCE
TOKAMAK DEVICES
TOMOGRAPHY
X RADIATION