Disruption avoidance in the SINP-Tokamak by means of electrode-biasing at the plasma edge

Journal Article · Wed May 15 00:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4803656· OSTI ID:22218611

Basu, Debjyoti ^[1]; Pal, Rabindranath ^[1]; Martinell, Julio J. ^[2]; Ghosh, Joydeep; Chattopadhyay, Prabal K. ^[3]

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1. Saha Institute of Nuclear Physics, 1/AF-Bidhannagar, Kolkata 700064, WB (India)
2. Instituto de Ciencias Nucleares-UNAM, Mexico D.F. 04510 (Mexico)
3. Institute for Plasma Research, Gandhinagar (India)

Control of plasma disruption by a biased edge electrode is reported in SINP-Tokamak. The features that characterize a plasma disruption are reduced with increasing bias potential. The disruption can be completely suppressed with the concomitant stabilization of observed MHD modes that are allegedly precursors of the disruption. An m = 3/n = 1 tearing mode, which apparently causes disruption can be stabilized when a negative biasing potential is applied near the edge. These changes in the disruptive behavior with edge biasing are hypothesized to be due to changes in the current density profile.

• OSTI ID: 22218611
• Journal Information: Physics of Plasmas, Vol. 20, Issue 5; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOUNDARY LAYERS
CURRENT DENSITY
ELECTRODES
MAGNETOHYDRODYNAMICS
PLASMA CONFINEMENT
PLASMA DISRUPTION
PLASMA POTENTIAL
PRECURSOR
SINP TOKAMAK
STABILIZATION
TEARING INSTABILITY