Speaker
Prabhakar Srivastav
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P2.1082.pdf
Electron Temperature Gradient (ETG) Turbulence Induced Particle
Transport in Finite Beta Laboratory Plasma
Prabhakar Srivastav1, Rameswar Singh1, L. M. Awasthi1, A. K. Sanyasi1, P. K. Srivastava1, R.
Sugandhi1 and R. Singh2
1
Institute for Plasma Research, HBNI, Gandhinagar, India
2
Advance Technology Center, NFRI, Daejeon, Rep. of Korea
Abstract
Plasma transport across confining magnetic field continues to bother fusion fraternity,
engendering numerous efforts on experimental, theoretical and computational studies. Although,
over recent times, problem concerning ion scales is greatly resolved but success on containing
electron scale contribution to plasma loss still eludes. The reason for this may be the inability of
carrying out direct measurements in fusion devices due to extremely small scale lengths and
unfavorable conditions [1].
Prompted by recent success of successful demonstration of unambiguous excitation of Electron
Temperature Gradient (ETG) turbulence, by introduction of a Electron Energy Filter (EEF) in
Large Volume Plasma Device (LVPD)[2]. This helped in tailoring plasma for satisfying
threshold condition of ETG i.e., e Lne LTe , where Lne and LTe are plasma density and electron
temperature gradient scale lengths respectively. We investigated particle transport, classified as
either electrostatic or magnetic in origin, in finite beta ( 0.01 0.4 ) plasma of LVPD and
observed particle flux follow the beta scaling for ETG turbulence. Detailed Results on effect of
plasma beta scaling on electrostatic and electromagnetic components of particle flux and their
respective dominance towards contributing plasma loss will be presented in the conference.
References:
1. P. C. Liewer, Nucl. Fusion 25, 543 (1985).
2. S.K. Mattoo, et.al Phys. Rev. Lett. 108, 255007(2012)
