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Oct 13 – 18, 2014
Hotel Park Inn Pribaltiyskaya
Europe/Moscow timezone

Disruption Control Using Biased Electrode in Aditya Tokamak

Oct 17, 2014, 8:30 AM
4h
Green 8-9 (Hotel Park Inn Pribaltiyskaya)

Green 8-9

Hotel Park Inn Pribaltiyskaya

Saint Petersburg, Russian Federation
Poster Poster 7

Speaker

Mr Pravesh Dhyani (Institute for Plasma Research, Gandhinagar, India)

Description

Improvement in tokamak plasma confinement using biased electrodes observed in many tokamaks is a well-established phenomenon. In this paper we show that very use of the same biased electrode can mitigate the disruptions in tokamak plasmas through stabilization of magnetohydrodynamics (MHD) modes. Disruption induced in Aditya tokamak by H2 gas puffing is successfully mitigated by applying the positive bias voltage to the electrode placed in the LCFS prior to the gas injection. Sheared ((E_r)times(B_phi)) rotation of the plasma generated by biasing leads to substantial reduction in growth of MHD modes (m /n = 3/1, 2/1) and avoids disruptions through prevention of mode locking.
Country or International Organisation India
Paper Number EX/P7-17

Primary author

Mr Pravesh Dhyani (Institute for Plasma Research, Gandhinagar, India)

Co-authors

Dr Asim Kumar Chattopadhyay (Institute for Plasma Research, Gandhinagar, India) Mr C.N. Gupta (Institute for Plasma Research, Gandhinagar, India) Dr C.V.S. Rao (Institute for Plasma Research, Gandhinagar, India) Dr D. Raju (Institute for Plasma Research, Gandhinagar, India) Dr Debjyoti Basu (Institute for Plasma Research, Gandhinagar, India) Dr J. Ghosh (Institute for Plasma Research, Gandhinagar, India) Mr K. Sathyanarayana (Institute for Plasma Research, Gandhinagar, India) Ms N. Ramaiya (Institute for Plasma Research, Gandhinagar, India) Mr P.K. Atrey (Institute for Plasma Research, Gandhinagar, India) Dr P.K. Chattopadhyay (Institute for Plasma Research, Gandhinagar, India) Prof. R. Pal (Saha Institute of Nuclear Physics, Kolkata, India) Mr R.L. Tanna (Institute for Plasma Research, Gandhinagar, India) Prof. Ratneshwar Jha (Institute for Plasma Research, Gandhinagar, India) Mr S. Joisa (Institute for Plasma Research, Gandhinagar, India) Mr S. Kumar (Institute for Plasma Research, Gandhinagar, India) Mr S.B. Bhatt (Institute for Plasma Research, Gandhinagar, India) Prof. Y.C. Saxena (Institute for Plasma Research, Gandhinagar, India)

Presentation materials