You need JavaScript to view this

Electron cyclotron resonance heating on the TCA tokamak

Technical Report:

Abstract

Electron Cyclotron Resonance Heating experiments at 39 GHz and power levels similar to Ohmic heating power levels have been conducted in the TCA tokamak, in either X- or O-mode. ECRH was observed to be more efficiently absorbed for low density and low q{sub a} discharges. At low density the central electron temperature is increased by a factor of two over Ohmic cases and the stored energy increased by 40% with up to 80% of the plasma energy supplied by ECRH. During ECRH low density operation the electron energy confinement time {tau}{sub Ee} is the same as during pure Ohmic heating but {tau}{sub Ee} degrades with ECRH power at high density. The decrease in the loop voltage required to maintain a constant current during ECRH is a very reproducible quantity and can be attributed in almost all cases to the change in the electron temperature. Sawtooth stabilization was produced with a sawtooth period of up to 10 times greater than that before ECRH. This stabilization depends on the ECRH toroidal injection angle and total input power. High energy ions are observed and their production is attributed to a 3-wave interaction process. (author) 17 figs., 24 refs.
Authors:
Pietrzyk, Z A; Pochelon, A; Behn, R; Bondeson, A; Dutch, M; Goodman, T P; Tran, M Q; Whaley, D R [1] 
  1. Ecole Polytechnique Federale, Lausanne (Switzerland). Centre de Recherche en Physique des Plasma (CRPP)
Publication Date:
Aug 01, 1992
Product Type:
Technical Report
Report Number:
LRP-459/92
Reference Number:
SCA: 700350; PA: AIX-24:009337; SN: 93000933730
Resource Relation:
Other Information: PBD: Aug 1992
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; TCA TOKAMAK; ECR HEATING; ABSORPTION; CONFINEMENT TIME; ELECTRIC CURRENTS; ELECTRIC POTENTIAL; ELECTRON TEMPERATURE; EXPERIMENTAL DATA; GHZ RANGE 01-100; INTERACTIONS; PLASMA DENSITY; SAWTOOTH OSCILLATIONS; STABILITY; STORED ENERGY; 700350; PLASMA PRODUCTION, HEATING, CURRENT DRIVE, AND INTERACTIONS
OSTI ID:
10119925
Research Organizations:
Ecole Polytechnique Federale, Lausanne (Switzerland). Centre de Recherche en Physique des Plasma (CRPP)
Country of Origin:
Switzerland
Language:
English
Other Identifying Numbers:
Other: ON: DE93613726; TRN: CH9200601009337
Availability:
OSTI; NTIS; INIS
Submitting Site:
CHN
Size:
[38] p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Pietrzyk, Z A, Pochelon, A, Behn, R, Bondeson, A, Dutch, M, Goodman, T P, Tran, M Q, and Whaley, D R. Electron cyclotron resonance heating on the TCA tokamak. Switzerland: N. p., 1992. Web.
Pietrzyk, Z A, Pochelon, A, Behn, R, Bondeson, A, Dutch, M, Goodman, T P, Tran, M Q, & Whaley, D R. Electron cyclotron resonance heating on the TCA tokamak. Switzerland.
Pietrzyk, Z A, Pochelon, A, Behn, R, Bondeson, A, Dutch, M, Goodman, T P, Tran, M Q, and Whaley, D R. 1992. "Electron cyclotron resonance heating on the TCA tokamak." Switzerland.
@misc{etde_10119925,
title = {Electron cyclotron resonance heating on the TCA tokamak}
author = {Pietrzyk, Z A, Pochelon, A, Behn, R, Bondeson, A, Dutch, M, Goodman, T P, Tran, M Q, and Whaley, D R}
abstractNote = {Electron Cyclotron Resonance Heating experiments at 39 GHz and power levels similar to Ohmic heating power levels have been conducted in the TCA tokamak, in either X- or O-mode. ECRH was observed to be more efficiently absorbed for low density and low q{sub a} discharges. At low density the central electron temperature is increased by a factor of two over Ohmic cases and the stored energy increased by 40% with up to 80% of the plasma energy supplied by ECRH. During ECRH low density operation the electron energy confinement time {tau}{sub Ee} is the same as during pure Ohmic heating but {tau}{sub Ee} degrades with ECRH power at high density. The decrease in the loop voltage required to maintain a constant current during ECRH is a very reproducible quantity and can be attributed in almost all cases to the change in the electron temperature. Sawtooth stabilization was produced with a sawtooth period of up to 10 times greater than that before ECRH. This stabilization depends on the ECRH toroidal injection angle and total input power. High energy ions are observed and their production is attributed to a 3-wave interaction process. (author) 17 figs., 24 refs.}
place = {Switzerland}
year = {1992}
month = {Aug}
}