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Controlling Confinement with Induced Toroidal Current in the Flexible Heliac TJ-II

Abstract

A method to control plasma particle an energy confinement in the TJ-II Heliac devices is reported A small toroidal current is induced in the plasma with the aid of a 0.2 Wb air core transformer. Plasma particle and energy confinement improve (degrade) with negative (positive) plasma current. For typical TJ-II discharges plasma density and temperature broaden considerably when plasma current is sufficiently negative, accounting for a 40% increase in stored energy. The experimental results agree qualitatively with the paradigm of instability growth rate modifications with magnetic shear. (Author) 18 refs.
Publication Date:
Jul 01, 2002
Product Type:
Technical Report
Report Number:
CIEMAT-990
Resource Relation:
Other Information: PBD: 2002
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; TOKAMAK DEVICES; PLASMA CONFINEMENT; HELIAC STELLARATORS; PLASMA DENSITY; PLASMA INSTABILITY; TOROIDAL CONFIGURATION
OSTI ID:
20255363
Research Organizations:
Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas, Madrid (Spain)
Country of Origin:
Spain
Language:
English
Other Identifying Numbers:
TRN: ES02B0214
Availability:
INIS
Submitting Site:
SPN
Size:
20 pages
Announcement Date:

Citation Formats

Romero, J A, Lopez-Bruna, D, Lopez-Fraguas, A, Ascasibar, E, and TJ-II Team. Controlling Confinement with Induced Toroidal Current in the Flexible Heliac TJ-II. Spain: N. p., 2002. Web.
Romero, J A, Lopez-Bruna, D, Lopez-Fraguas, A, Ascasibar, E, & TJ-II Team. Controlling Confinement with Induced Toroidal Current in the Flexible Heliac TJ-II. Spain.
Romero, J A, Lopez-Bruna, D, Lopez-Fraguas, A, Ascasibar, E, and TJ-II Team. 2002. "Controlling Confinement with Induced Toroidal Current in the Flexible Heliac TJ-II." Spain.
@misc{etde_20255363,
title = {Controlling Confinement with Induced Toroidal Current in the Flexible Heliac TJ-II}
author = {Romero, J A, Lopez-Bruna, D, Lopez-Fraguas, A, Ascasibar, E, and TJ-II Team}
abstractNote = {A method to control plasma particle an energy confinement in the TJ-II Heliac devices is reported A small toroidal current is induced in the plasma with the aid of a 0.2 Wb air core transformer. Plasma particle and energy confinement improve (degrade) with negative (positive) plasma current. For typical TJ-II discharges plasma density and temperature broaden considerably when plasma current is sufficiently negative, accounting for a 40% increase in stored energy. The experimental results agree qualitatively with the paradigm of instability growth rate modifications with magnetic shear. (Author) 18 refs.}
place = {Spain}
year = {2002}
month = {Jul}
}