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

G. M. Batanov; M. S. Berezhetskii; V. D. Borzosekov; D. G. Vasilkov; I. Yu. Vafin; S. E. Grebenshchikov; I. A. Grishina; L. V. Kolik; E. M. Konchekov; N. F. Larionova; A. A. Letunov; V. P. Logvinenko; D. V. Malakhov; A. I. Meshcheryakov; A. E. Petrov; K. A. Sarksian; N. N. Skvortsova; V. D. Stepakhin; N. K. Kharchev; A. A. Kharchevskii; Yu. V. Kholnov; S. V. Shchepetov

doi:10.1134/S1063780X17080049

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

Авторы: 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
Учреждения:
1. Prokhorov General Physics Institute
2. Pirogov Russian National Research Medical University
3. Bauman Moscow State Technical University
4. Moscow Technological University
5. National Research Nuclear University “MEPhI,”
Выпуск: Том 43, № 8 (2017)
Страницы: 818-823
Раздел: Stellarators
URL: https://journals.rcsi.science/1063-780X/article/view/186180
DOI: https://doi.org/10.1134/S1063780X17080049
ID: 186180

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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.

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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

Полный текст

Аннотация

Об авторах

G. Batanov

M. Berezhetskii

V. Borzosekov

D. Vasilkov

I. Vafin

S. Grebenshchikov

I. Grishina

L. Kolik

E. Konchekov

N. Larionova

A. Letunov

V. Logvinenko

D. Malakhov

A. Meshcheryakov

A. Petrov

K. Sarksian

N. Skvortsova

V. Stepakhin

N. Kharchev

A. Kharchevskii

Yu. Kholnov

S. Shchepetov

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