Structure of Fluctuations in the Edge Plasma of a Stellarator in Modes with Transport Transitions

D. G. Vasil’kov; Васильков Д. Г.; N. N. Skvortsova; Скворцова Н. Н.; N. K. Kharchev; Харчев Н. К.

doi:10.31857/S0367292123600371

Structure of Fluctuations in the Edge Plasma of a Stellarator in Modes with Transport Transitions

Authors: Vasil’kov D.G.¹^,2, Skvortsova N.N.¹, Kharchev N.K.¹
Affiliations:
1. Prokhorov General Physics Institute, Russian Academy of Sciences
2. Bauman Moscow State Technical University
Issue: Vol 49, No 8 (2023)
Pages: 731-739
Section: СТЕЛЛАРАТОРЫ
URL: https://journals.rcsi.science/0367-2921/article/view/139562
DOI: https://doi.org/10.31857/S0367292123600371
EDN: https://elibrary.ru/HFLUJY
ID: 139562

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Abstract
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Abstract

The evolution of fluctuating signals from electrostatic and magnetic probes and reflectometry on the L-2M stellarator is presented. The L-2M facility is a quasi-stationary toroidal magnetic trap in which plasma is generated and heated by high-power pulsed microwave radiation. Pulses with transitions to improved confinement modes accompanied by an increase in energy, increase in plasma density, and restructuring of the peripheral electric field, were analyzed. Spectral analysis of signals is carried out using Fourier analysis and various wavelets. The possible influence of magnetohydrodynamic and kinetic instabilities on the development of transient processes is considered.

Keywords

magnetic confinement, stellarator, transport transitions, turbulence, probe measurements, reflectometry

References

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