Measurement of high-beta tokamak pressure profiles with multipoint Thomson scattering

Technical Report · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6334737

Levinton, F M

A multipoint Thomson-scattering system has been developed to obtain pressure profiles along the major radius of Torus II, a high-beta tokamak. The profiles obtained during the 20 to 25 ..mu..s lifetime of the discharge indicates that the plasma has a peak temperature of 80 eV and density of 1.0 x 10/sup 15/ cm/sup -3/. The profiles remain fairly constant during this time until the equilibrium is lost, after which the temperature and density decays to 10 eV and 10/sup 14/ cm/sup -3/ very quickly (approx. 1 ..mu..s). Experimental results show Torus II has a high-beta (<..beta..> approx. 10%) equilibrium, with a strong shift of the peak of the pressure profile towards the outside. Numerical results from a 2-D free boundary MHD equilibrium code have obtained equilibria which closely approximate the experimentally measured profiles.

• Research Organization: Columbia Univ., New York (USA). Plasma Physics Lab.
• DOE Contract Number: AC02-76ET53016
• OSTI ID: 6334737
• Report Number(s): DOE/ET/53016-81; COO-2456-81; ON: DE83012452
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
BETA RATIO
CLOSED PLASMA DEVICES
ELECTRON DENSITY
ELECTRON TEMPERATURE
HIGH-BETA PLASMA
INELASTIC SCATTERING
PLASMA
PLASMA DIAGNOSTICS
PLASMA PRESSURE
SCATTERING
THERMONUCLEAR DEVICES
THOMSON SCATTERING
TOKAMAK DEVICES