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Title: Confinement and power balance in the S-1 spheromak

The confinement and scaling features of the S-1 spheromak have been investigated using magnetic, spectroscopic, and Thomson scattering data in conjunction with numerical modeling. Results from the multipoint Thomson scattering diagnostic shows that the central beta remains constant (/beta//sub to/ /approximately/ 5%) as the plasma current density increases from 0.68--2.1 MA/m/sup 2/. The density is observed to increase slowly over this range, while the central electron temperature increases much more rapidly. Analysis of the global plasma parameters shows a decrease in the volume average beta and energy confinement as the total current is increased. The power balance has been modeled numerically with a 0-D non-equilibrium time-dependent coronal model and is consistent with the experimental observations. 20 refs., 12 figs., 2 tabs.
Authors:
; ; ; ; ; ;
Publication Date:
OSTI Identifier:
5936208
Report Number(s):
PPPL-2636
ON: DE89014342
DOE Contract Number:
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Research Org:
Princeton Univ., NJ (USA). Plasma Physics Lab.
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; SPHEROMAK DEVICES; PLASMA CONFINEMENT; CONFINEMENT TIME; CURRENT DENSITY; ELECTRIC CONDUCTIVITY; ELECTRON DENSITY; ELECTRON TEMPERATURE; PLASMA DIAGNOSTICS; POWER LOSSES; THOMSON SCATTERING; CLOSED PLASMA DEVICES; CONFINEMENT; ELECTRICAL PROPERTIES; ENERGY LOSSES; INELASTIC SCATTERING; LOSSES; PHYSICAL PROPERTIES; SCATTERING; THERMONUCLEAR DEVICES; TOKAMAK DEVICES 700101* -- Fusion Energy-- Plasma Research-- Confinement, Heating, & Production; 700102 -- Fusion Energy-- Plasma Research-- Diagnostics