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Title: 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

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{sub ⊥} = 2 cm{sup –1}) density fluctuations in the edge plasma, intensification of short-wavelength (k{sub ⊥} = 30 cm{sup –1}) and long-wavelength (k{sub ⊥} = 1 cm{sup –1}) fluctuations at the midradius of the plasma column, and intensification of short-wavelength fluctuations (k{sub ⊥} = 20 cm{sup –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.

Authors:
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  1. Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22760291
Resource Type:
Journal Article
Journal Name:
Plasma Physics Reports
Additional Journal Information:
Journal Volume: 43; Journal Issue: 8; Other Information: Copyright (c) 2017 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-780X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTRON CYCLOTRON-RESONANCE; FLUCTUATIONS; MAGNETOHYDRODYNAMICS; PLASMA DENSITY; PLASMA POTENTIAL; STELLARATORS

Citation Formats

Batanov, G. M., Berezhetskii, M. S., Borzosekov, V. D., Vasilkov, D. G., Vafin, I. Yu., Grebenshchikov, S. E., Grishina, I. A., Kolik, L. V., Konchekov, E. M., E-mail: konchekov@fpl.gpi.ru, Larionova, N. F., Letunov, A. A., Logvinenko, V. P., Malakhov, D. V., Meshcheryakov, A. I., Petrov, A. E., Sarksian, K. A., Skvortsova, N. N., Stepakhin, V. D., Kharchev, N. K., Kharchevskii, A. A., and others, and. 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. United States: N. p., 2017. Web. doi:10.1134/S1063780X17080049.
Batanov, G. M., Berezhetskii, M. S., Borzosekov, V. D., Vasilkov, D. G., Vafin, I. Yu., Grebenshchikov, S. E., Grishina, I. A., Kolik, L. V., Konchekov, E. M., E-mail: konchekov@fpl.gpi.ru, Larionova, N. F., Letunov, A. A., Logvinenko, V. P., Malakhov, D. V., Meshcheryakov, A. I., Petrov, A. E., Sarksian, K. A., Skvortsova, N. N., Stepakhin, V. D., Kharchev, N. K., Kharchevskii, A. A., & others, and. 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. United States. doi:10.1134/S1063780X17080049.
Batanov, G. M., Berezhetskii, M. S., Borzosekov, V. D., Vasilkov, D. G., Vafin, I. Yu., Grebenshchikov, S. E., Grishina, I. A., Kolik, L. V., Konchekov, E. M., E-mail: konchekov@fpl.gpi.ru, Larionova, N. F., Letunov, A. A., Logvinenko, V. P., Malakhov, D. V., Meshcheryakov, A. I., Petrov, A. E., Sarksian, K. A., Skvortsova, N. N., Stepakhin, V. D., Kharchev, N. K., Kharchevskii, A. A., and others, and. Tue . "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". United States. doi:10.1134/S1063780X17080049.
@article{osti_22760291,
title = {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},
author = {Batanov, G. M. and Berezhetskii, M. S. and Borzosekov, V. D. and Vasilkov, D. G. and Vafin, I. Yu. and Grebenshchikov, S. E. and Grishina, I. A. and Kolik, L. V. and Konchekov, E. M., E-mail: konchekov@fpl.gpi.ru and Larionova, N. F. and Letunov, A. A. and Logvinenko, V. P. and Malakhov, D. V. and Meshcheryakov, A. I. and Petrov, A. E. and Sarksian, K. A. and Skvortsova, N. N. and Stepakhin, V. D. and Kharchev, N. K. and Kharchevskii, A. A. and others, and},
abstractNote = {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{sub ⊥} = 2 cm{sup –1}) density fluctuations in the edge plasma, intensification of short-wavelength (k{sub ⊥} = 30 cm{sup –1}) and long-wavelength (k{sub ⊥} = 1 cm{sup –1}) fluctuations at the midradius of the plasma column, and intensification of short-wavelength fluctuations (k{sub ⊥} = 20 cm{sup –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.},
doi = {10.1134/S1063780X17080049},
journal = {Plasma Physics Reports},
issn = {1063-780X},
number = 8,
volume = 43,
place = {United States},
year = {2017},
month = {8}
}