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Title: Magneto-hydrodynamically stable axisymmetric mirrors

Abstract

Making axisymmetric mirrors magnetohydrodynamically (MHD) stable opens up exciting opportunities for using mirror devices as neutron sources, fusion-fission hybrids, and pure-fusion reactors. This is also of interest from a general physics standpoint (as it seemingly contradicts well-established criteria of curvature-driven instabilities). The axial symmetry allows for much simpler and more reliable designs of mirror-based fusion facilities than the well-known quadrupole mirror configurations. In this tutorial, after a summary of classical results, several techniques for achieving MHD stabilization of the axisymmetric mirrors are considered, in particular: (1) employing the favorable field-line curvature in the end tanks; (2) using the line-tying effect; (3) controlling the radial potential distribution; (4) imposing a divertor configuration on the solenoidal magnetic field; and (5) affecting the plasma dynamics by the ponderomotive force. Some illuminative theoretical approaches for understanding axisymmetric mirror stability are described. The applicability of the various stabilization techniques to axisymmetric mirrors as neutron sources, hybrids, and pure-fusion reactors are discussed; and the constraints on the plasma parameters are formulated.

Authors:
; ;  [1];  [2];  [3]
  1. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
  2. University of Texas, Austin, Texas 78712 (United States)
  3. University of California, Berkeley, California 94720 (United States)
Publication Date:
OSTI Identifier:
22043485
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 18; Journal Issue: 9; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; AXIAL SYMMETRY; DESIGN; DISTRIBUTION; DIVERTORS; HYBRID REACTORS; MAGNETIC FIELDS; MAGNETIC MIRRORS; MAGNETOHYDRODYNAMICS; MIRRORS; NEUTRON SOURCES; PLASMA INSTABILITY; PONDEROMOTIVE FORCE; STABILITY; STABILIZATION; THERMONUCLEAR REACTORS

Citation Formats

Ryutov, D. D., Cohen, B. I., Molvik, A. W., Berk, H. L., and Simonen, T. C. Magneto-hydrodynamically stable axisymmetric mirrors. United States: N. p., 2011. Web. doi:10.1063/1.3624763.
Ryutov, D. D., Cohen, B. I., Molvik, A. W., Berk, H. L., & Simonen, T. C. Magneto-hydrodynamically stable axisymmetric mirrors. United States. doi:10.1063/1.3624763.
Ryutov, D. D., Cohen, B. I., Molvik, A. W., Berk, H. L., and Simonen, T. C. Thu . "Magneto-hydrodynamically stable axisymmetric mirrors". United States. doi:10.1063/1.3624763.
@article{osti_22043485,
title = {Magneto-hydrodynamically stable axisymmetric mirrors},
author = {Ryutov, D. D. and Cohen, B. I. and Molvik, A. W. and Berk, H. L. and Simonen, T. C.},
abstractNote = {Making axisymmetric mirrors magnetohydrodynamically (MHD) stable opens up exciting opportunities for using mirror devices as neutron sources, fusion-fission hybrids, and pure-fusion reactors. This is also of interest from a general physics standpoint (as it seemingly contradicts well-established criteria of curvature-driven instabilities). The axial symmetry allows for much simpler and more reliable designs of mirror-based fusion facilities than the well-known quadrupole mirror configurations. In this tutorial, after a summary of classical results, several techniques for achieving MHD stabilization of the axisymmetric mirrors are considered, in particular: (1) employing the favorable field-line curvature in the end tanks; (2) using the line-tying effect; (3) controlling the radial potential distribution; (4) imposing a divertor configuration on the solenoidal magnetic field; and (5) affecting the plasma dynamics by the ponderomotive force. Some illuminative theoretical approaches for understanding axisymmetric mirror stability are described. The applicability of the various stabilization techniques to axisymmetric mirrors as neutron sources, hybrids, and pure-fusion reactors are discussed; and the constraints on the plasma parameters are formulated.},
doi = {10.1063/1.3624763},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 9,
volume = 18,
place = {United States},
year = {2011},
month = {9}
}