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Title: Vertical stability in a current-carrying stellarator

Abstract

An analytic stability criterion is derived for the vertical mode in a large aspect ratio stellarator with uniform current density profile. The effects of vacuum magnetic field generated by helical coils are shown to be stabilizing due to enhancement of field line bending energy. For a wall at infinite distance from the plasma, the amount of external poloidal flux needed for stabilization is given by f=({kappa}{sup 2}-{kappa})/({kappa}{sup 2}+1), where {kappa} is the axisymmetric elongation and f is the ratio of vacuum rotational transform to the total transform. (c) 2000 American Institute of Physics.

Authors:
 [1]
  1. Princeton Plasma Physics Laboratory, Princeton University, P. O. Box 451, Princeton, New Jersey 08543 (United States)
Publication Date:
OSTI Identifier:
20215724
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 7; Journal Issue: 4; Other Information: PBD: Apr 2000; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; STELLARATORS; PLASMA INSTABILITY; MAGNETIC FIELDS; CHARGED-PARTICLE TRANSPORT; THEORETICAL DATA

Citation Formats

Fu, G Y. Vertical stability in a current-carrying stellarator. United States: N. p., 2000. Web. doi:10.1063/1.873916.
Fu, G Y. Vertical stability in a current-carrying stellarator. United States. https://doi.org/10.1063/1.873916
Fu, G Y. 2000. "Vertical stability in a current-carrying stellarator". United States. https://doi.org/10.1063/1.873916.
@article{osti_20215724,
title = {Vertical stability in a current-carrying stellarator},
author = {Fu, G Y},
abstractNote = {An analytic stability criterion is derived for the vertical mode in a large aspect ratio stellarator with uniform current density profile. The effects of vacuum magnetic field generated by helical coils are shown to be stabilizing due to enhancement of field line bending energy. For a wall at infinite distance from the plasma, the amount of external poloidal flux needed for stabilization is given by f=({kappa}{sup 2}-{kappa})/({kappa}{sup 2}+1), where {kappa} is the axisymmetric elongation and f is the ratio of vacuum rotational transform to the total transform. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.873916},
url = {https://www.osti.gov/biblio/20215724}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 4,
volume = 7,
place = {United States},
year = {Sat Apr 01 00:00:00 EST 2000},
month = {Sat Apr 01 00:00:00 EST 2000}
}