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Tokamak start-up with electron-cyclotron heating

Journal Article:

Abstract

Experiments are described in which the start-up voltage in a tokamak is reduced by about a factor of two by the use of a modest amount of electron cyclotron resonance heating power for pre-ionization. The solution of the zero-dimensional start-up equations indicates that the effect is due to the high initial density which increases the rate at which the conductivity increases in the neutral-dominated initial plasma. The effect extrapolates favourably to larger tokamaks. A 50% reduction in the start-up volt-second requirement and impurity reflux is also observed.
Authors:
Holly, D J; Prager, S C; Shepard, D A; Sprott, J C [1] 
  1. Wisconsin Univ., Madison (USA)
Publication Date:
Nov 01, 1981
Product Type:
Journal Article
Reference Number:
AIX-13-651982; ERA-07-027478; EDB-82-063346
Resource Relation:
Journal Name: Nucl. Fusion; (Austria); Journal Volume: 21:11
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; TOKAMAK DEVICES; ECR HEATING; ELECTRIC CURRENTS; ELECTRIC DISCHARGES; REACTOR START-UP; CLOSED PLASMA DEVICES; CURRENTS; HEATING; HIGH-FREQUENCY HEATING; OPERATION; PLASMA HEATING; REACTOR OPERATION; START-UP; THERMONUCLEAR DEVICES; 700104* - Fusion Energy- Plasma Research- Plasma Kinetics-Experimental- (-1987); 700101 - Fusion Energy- Plasma Research- Confinement, Heating, & Production
OSTI ID:
5667400
Country of Origin:
Austria
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: NUFUA
Submitting Site:
INIS
Size:
Pages: 1483-1487
Announcement Date:

Journal Article:

Citation Formats

Holly, D J, Prager, S C, Shepard, D A, and Sprott, J C. Tokamak start-up with electron-cyclotron heating. Austria: N. p., 1981. Web.
Holly, D J, Prager, S C, Shepard, D A, & Sprott, J C. Tokamak start-up with electron-cyclotron heating. Austria.
Holly, D J, Prager, S C, Shepard, D A, and Sprott, J C. 1981. "Tokamak start-up with electron-cyclotron heating." Austria.
@misc{etde_5667400,
title = {Tokamak start-up with electron-cyclotron heating}
author = {Holly, D J, Prager, S C, Shepard, D A, and Sprott, J C}
abstractNote = {Experiments are described in which the start-up voltage in a tokamak is reduced by about a factor of two by the use of a modest amount of electron cyclotron resonance heating power for pre-ionization. The solution of the zero-dimensional start-up equations indicates that the effect is due to the high initial density which increases the rate at which the conductivity increases in the neutral-dominated initial plasma. The effect extrapolates favourably to larger tokamaks. A 50% reduction in the start-up volt-second requirement and impurity reflux is also observed.}
journal = {Nucl. Fusion; (Austria)}
volume = {21:11}
journal type = {AC}
place = {Austria}
year = {1981}
month = {Nov}
}