Generalized energy principle for flute perturbations in axisymmetric mirror machines
- AN SSSR, Novosibirsk (Russian Federation). Inst. Yadernoj Fiziki
Axial symmetry is a very desirable property of the mirror devices both for fusion and neutron source applications. The main obstacle to be circumvented in the development of such systems, is the flute instability of axisymmetric mirrors. In recent years there appeared a number of proposals, devoted to the stabilization of the flute perturbations in the framework of axisymmetric magnetic configurations, which are based on the combining of the MHD unstable central cell with various types of end-cell stabilizers. In the present paper we concentrate ourselves just on this scheme, including long solenoid with a uniform field, conjugated with the end stabilizing anchor, intended to provide MHD stability of the system as a whole. The attractive feature of such a configuration is that it allows to exploit finite larmor radius (FLR) effects for the stabilization of the flute perturbations. As is well known, FLR effects, being strong, stabilize all flute modes, except the one with azimuthal number m = 1, corresponding to the ``rigid`` displacement of the plasma column (the ``global`` mode). Consequently, in the conditions when FLR effects dominate, the anchor has to stabilize the ``global` mode only. Bearing in mind a favorable influence of FLR effects we, however, don`t restrict our paper by discussion of only ``global`` mode stability and consider a general case of an arbitrary azimuthal mode.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 10179879
- Report Number(s):
- UCRL-CR--113135; ON: DE93019399
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
070201
663300
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700480
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COMPONENT DEVELOPMENT
DESIGN, FABRICATION, AND OPERATION
FLUTE INSTABILITY
LARMOR RADIUS
MAGNETIC MIRRORS
MAGNETOHYDRODYNAMICS
MATERIALS STUDIES
NEUTRON SOURCES
NUCLEAR PHYSICS
NUCLEAR REACTIONS AND SCATTERING
GENERAL
PLASMA
THERMONUCLEAR REACTIONS