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Title: Geodesic acoustic modes in noncircular cross section tokamaks

Abstract

The influence of the shape of the plasma cross section on the continuous spectrum of geodesic acoustic modes (GAMs) in a tokamak is analyzed in the framework of the MHD model. An expression for the frequency of a local GAM for a model noncircular cross section plasma equilibrium is derived. Amendments to the oscillation frequency due to the plasma elongation and triangularity and finite tokamak aspect ratio are calculated. It is shown that the main factor affecting the GAM spectrum is the plasma elongation, resulting in a significant decrease in the mode frequency.

Authors:
;  [1];  [2];  [1]
  1. National Research Center “Kurchatov Institute,” (Russian Federation)
  2. People’s Friendship University of Russia (Russian Federation)
Publication Date:
OSTI Identifier:
22614018
Resource Type:
Journal Article
Resource Relation:
Journal Name: Plasma Physics Reports; Journal Volume: 43; Journal Issue: 3; Other Information: Copyright (c) 2017 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ASPECT RATIO; CROSS SECTIONS; ELONGATION; GEODESICS; MAGNETOHYDRODYNAMICS; OSCILLATIONS; PLASMA; SHAPE; SOUND WAVES; SPECTRA; TOKAMAK DEVICES

Citation Formats

Sorokina, E. A., E-mail: sorokina.ekaterina@gmail.com, Lakhin, V. P., Konovaltseva, L. V., and Ilgisonis, V. I. Geodesic acoustic modes in noncircular cross section tokamaks. United States: N. p., 2017. Web. doi:10.1134/S1063780X17030126.
Sorokina, E. A., E-mail: sorokina.ekaterina@gmail.com, Lakhin, V. P., Konovaltseva, L. V., & Ilgisonis, V. I. Geodesic acoustic modes in noncircular cross section tokamaks. United States. doi:10.1134/S1063780X17030126.
Sorokina, E. A., E-mail: sorokina.ekaterina@gmail.com, Lakhin, V. P., Konovaltseva, L. V., and Ilgisonis, V. I. Wed . "Geodesic acoustic modes in noncircular cross section tokamaks". United States. doi:10.1134/S1063780X17030126.
@article{osti_22614018,
title = {Geodesic acoustic modes in noncircular cross section tokamaks},
author = {Sorokina, E. A., E-mail: sorokina.ekaterina@gmail.com and Lakhin, V. P. and Konovaltseva, L. V. and Ilgisonis, V. I.},
abstractNote = {The influence of the shape of the plasma cross section on the continuous spectrum of geodesic acoustic modes (GAMs) in a tokamak is analyzed in the framework of the MHD model. An expression for the frequency of a local GAM for a model noncircular cross section plasma equilibrium is derived. Amendments to the oscillation frequency due to the plasma elongation and triangularity and finite tokamak aspect ratio are calculated. It is shown that the main factor affecting the GAM spectrum is the plasma elongation, resulting in a significant decrease in the mode frequency.},
doi = {10.1134/S1063780X17030126},
journal = {Plasma Physics Reports},
number = 3,
volume = 43,
place = {United States},
year = {Wed Mar 15 00:00:00 EDT 2017},
month = {Wed Mar 15 00:00:00 EDT 2017}
}