Tomography of m = 1 mode structure in tokamak plasma using least-square-fitting method and Fourier--Bessel expansions

Journal Article · Thu Oct 01 04:00:00 EDT 1987 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.339420· OSTI ID:6262022

Nagayama, Y

A method is discussed for reconstruction of the emissivity profile from projections. The emissivity profile is expanded into Fourier--Bessel expansions, of which coefficients are determined by the use of least-square-fitting method with the help of the Akaike information criterion. Tomographic reconstruction of the m = 1 mode structure is obtained in JIPP T-II tokamak during the precursor oscillation of the sawtooth crash. The m = 1 mode structure fits Wesson model rather than the Kadomtsev model.

• Research Organization: Deparment of Physics, Faculty of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113, Japan
• OSTI ID: 6262022
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 62:7; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
CLOSED PLASMA DEVICES
DIAGNOSTIC TECHNIQUES
ELECTROMAGNETIC RADIATION
FLUID MECHANICS
HYDRODYNAMICS
IONIZING RADIATIONS
MAGNETOHYDRODYNAMICS
MECHANICS
PLASMA DIAGNOSTICS
PLASMA WAVES
RADIATIONS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TOMOGRAPHY
X RADIATION