Reaction of turbulence at the edge and in the center of the plasma column to pulsed impurity injection caused by the sputtering of the wall coating in L-2M stellarator
- Authors: Batanov G.M.1, Berezhetskii M.S.1, Borzosekov V.D.1,2, Vasilkov D.G.1,3, Vafin I.Y.1, Grebenshchikov S.E.1, Grishina I.A.1, Kolik L.V.1, Konchekov E.M.1,2, Larionova N.F.1, Letunov A.A.1, Logvinenko V.P.1, Malakhov D.V.1,2,4, Meshcheryakov A.I.1, Petrov A.E.1,2, Sarksian K.A.1, Skvortsova N.N.1,4,5, Stepakhin V.D.1,2, Kharchev N.K.1, Kharchevskii A.A.1, Kholnov Y.V.1, Shchepetov S.V.1
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Affiliations:
- Prokhorov General Physics Institute
- Pirogov Russian National Research Medical University
- Bauman Moscow State Technical University
- Moscow Technological University
- National Research Nuclear University “MEPhI,”
- Issue: Vol 43, No 8 (2017)
- Pages: 818-823
- Section: Stellarators
- URL: https://journals.rcsi.science/1063-780X/article/view/186180
- DOI: https://doi.org/10.1134/S1063780X17080049
- ID: 186180
Cite item
Abstract
Impurity injection into plasma caused by the sputtering of the wall coating in the L-2M stellarator during auxiliary electron cyclotron resonance heating leads to a change in the level of plasma density fluctuations with frequencies above 0.25 MHz: suppression of long-wavelength (k⊥ = 2 cm–1) density fluctuations in the edge plasma, intensification of short-wavelength (k⊥ = 30 cm–1) and long-wavelength (k⊥ = 1 cm–1) fluctuations at the midradius of the plasma column, and intensification of short-wavelength fluctuations (k⊥ = 20 cm–1) in the plasma center (including the gyroresonance region). At the same time, the level of fluctuations with frequencies below 0.25 MHz remains unchanged. In the edge plasma, a decrease in the plasma potential and suppression of its fluctuations is observed during impurity injection, which also causes an increase in MHD activity.
About the authors
G. M. Batanov
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991
M. S. Berezhetskii
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991
V. D. Borzosekov
Prokhorov General Physics Institute; Pirogov Russian National Research Medical University
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991; Moscow, 117997
D. G. Vasilkov
Prokhorov General Physics Institute; Bauman Moscow State Technical University
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991; Moscow, 105005
I. Yu. Vafin
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991
S. E. Grebenshchikov
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991
I. A. Grishina
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991
L. V. Kolik
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991
E. M. Konchekov
Prokhorov General Physics Institute; Pirogov Russian National Research Medical University
Author for correspondence.
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991; Moscow, 117997
N. F. Larionova
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991
A. A. Letunov
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991
V. P. Logvinenko
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991
D. V. Malakhov
Prokhorov General Physics Institute; Pirogov Russian National Research Medical University; Moscow Technological University
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991; Moscow, 117997; Moscow, 119454
A. I. Meshcheryakov
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991
A. E. Petrov
Prokhorov General Physics Institute; Pirogov Russian National Research Medical University
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991; Moscow, 117997
K. A. Sarksian
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991
N. N. Skvortsova
Prokhorov General Physics Institute; Moscow Technological University; National Research Nuclear University “MEPhI,”
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991; Moscow, 119454; Moscow, 115409
V. D. Stepakhin
Prokhorov General Physics Institute; Pirogov Russian National Research Medical University
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991; Moscow, 117997
N. K. Kharchev
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991
A. A. Kharchevskii
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991
Yu. V. Kholnov
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991
S. V. Shchepetov
Prokhorov General Physics Institute
Email: konchekov@fpl.gpi.ru
Russian Federation, Moscow, 119991