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Density limit disruption studies in the TCA tokamak

Technical Report:

Abstract

This paper describes density limit plasma disruptions that take place during the density increase in the plasma current flat top of TCA. In TCA, such disruptions have been observed to occur at two different densities, depending on discharge programming. An efficient method of achieving high density is to introduce a strong influx of neutral gas to the plasma, which was found to allow the plasma density to cross a range of densities that was otherwise unstable. In this kind of operation the disruption was observed to be approached from high to low plasma inductance in contrast to a slower density rise where the inductance is increasing. The study of the plasma temperature and density profiles as the disruption is approached, together with the characterisation of the mode and sawtooth activity, gives further insights into the physics of plasma disruptions. (author) 32 figs., 3 tabs., 30 refs.
Authors:
Pietrzyk, Z A; Pochelon, A; Behn, R; Bondeson, A; Duperrex, P A; Duval, B P; Joye, B; Knight, A J; Marchal, B; Nieswand, C [1] 
  1. Ecole Polytechnique Federale, Lausanne (Switzerland). Centre de Recherche en Physique des Plasma (CRPP)
Publication Date:
Oct 01, 1991
Product Type:
Technical Report
Report Number:
LRP-438/91
Reference Number:
SCA: 700300; PA: AIX-23:013580; SN: 92000639295
Resource Relation:
Other Information: PBD: Oct 1991
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; PLASMA DENSITY; LIMITING VALUES; TCA TOKAMAK; PLASMA DISRUPTION; AMPLITUDES; BORON; ELECTRIC CURRENTS; EXPERIMENTAL DATA; FREQUENCY DEPENDENCE; JET TOKAMAK; MAGNETIC SURFACES; MARFE; PLASMA DIAGNOSTICS; PLASMA INSTABILITY; QUENCHING; SAWTOOTH OSCILLATIONS; THOMSON SCATTERING; 700300; PLASMA PHYSICS AND FUSION RESEARCH
OSTI ID:
10111646
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: DE92614433; TRN: CH9100677013580
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
CHN
Size:
74 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Pietrzyk, Z A, Pochelon, A, Behn, R, Bondeson, A, Duperrex, P A, Duval, B P, Joye, B, Knight, A J, Marchal, B, and Nieswand, C. Density limit disruption studies in the TCA tokamak. Switzerland: N. p., 1991. Web.
Pietrzyk, Z A, Pochelon, A, Behn, R, Bondeson, A, Duperrex, P A, Duval, B P, Joye, B, Knight, A J, Marchal, B, & Nieswand, C. Density limit disruption studies in the TCA tokamak. Switzerland.
Pietrzyk, Z A, Pochelon, A, Behn, R, Bondeson, A, Duperrex, P A, Duval, B P, Joye, B, Knight, A J, Marchal, B, and Nieswand, C. 1991. "Density limit disruption studies in the TCA tokamak." Switzerland.
@misc{etde_10111646,
title = {Density limit disruption studies in the TCA tokamak}
author = {Pietrzyk, Z A, Pochelon, A, Behn, R, Bondeson, A, Duperrex, P A, Duval, B P, Joye, B, Knight, A J, Marchal, B, and Nieswand, C}
abstractNote = {This paper describes density limit plasma disruptions that take place during the density increase in the plasma current flat top of TCA. In TCA, such disruptions have been observed to occur at two different densities, depending on discharge programming. An efficient method of achieving high density is to introduce a strong influx of neutral gas to the plasma, which was found to allow the plasma density to cross a range of densities that was otherwise unstable. In this kind of operation the disruption was observed to be approached from high to low plasma inductance in contrast to a slower density rise where the inductance is increasing. The study of the plasma temperature and density profiles as the disruption is approached, together with the characterisation of the mode and sawtooth activity, gives further insights into the physics of plasma disruptions. (author) 32 figs., 3 tabs., 30 refs.}
place = {Switzerland}
year = {1991}
month = {Oct}
}