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 |
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)
