Characteristics of discharge disruptions in the T-10 tokamak

Journal Article · Sat Jun 15 04:00:00 EDT 2013 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X1306010X· OSTI ID:22126451

Dremin, M. M.; Kakurin, A. M.; Kislov, A. Ya.; Mal'tsev, S. G.; Notkin, G. E.; Pavlov, Yu. D.; Poznyak, V. I.; Sushkov, A. V. ^[1]

---

1. National Research Centre Kurchatov Institute (Russian Federation)

The results of experimental studies of discharge disruptions in the T-10 tokamak at the limiting plasma density are presented. On the basis of measurements of the generated soft X-ray emission, for a group of 'slow' disruptions, the dynamics of the magnetic configuration of the central part of the plasma column is studied and the possible role of the m/n = 1/1 mode in the excitation of predisruptions or the final stage of disruption is analyzed. It is shown that the characteristics of plasma electron cooling in predisruptions correspond to those of electron cooling upon pellet injection into T-10 and in discharge predisruptions occurring in regimes with the 'quiet mode.' It is found that, in the latter case, the reason for predisruptions and fast electron cooling in the plasma core is the instability of the m/n = 2/1 mode, its spontaneous spatial reconstruction, and the generation of a 'cooling wave' during this process. Measurements of the electron temperature (determined from the plasma radiation intensity at the second electron cyclotron harmonic) in the zone of the m/n = 2/1 mode have shown that the transformation of the m/n = 2/1 mode leads to the excitation of predisruptions and the final phase of disruption not only in regimes with the 'quiet mode,' but also in disruptions of ordinary ohmic discharges. The experimental results obtained in this work make it possible to determine the scenario of the development of 'slow' discharge disruptions in the T-10 tokamak at the limiting plasma density.

• OSTI ID: 22126451
• Journal Information: Plasma Physics Reports, Journal Name: Plasma Physics Reports Journal Issue: 6 Vol. 39; ISSN PPHREM; ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRIC DISCHARGES
ELECTRON COOLING
ELECTRON CYCLOTRON-RESONANCE
ELECTRON TEMPERATURE
EXCITATION
MAGNETIC FIELD CONFIGURATIONS
PELLET INJECTION
PLASMA DENSITY
PLASMA INSTABILITY
SOFT X RADIATION
T-10 TOKAMAK