Flute instability and the associated radial transport in the tandem mirror with a divertor mirror cell

Journal Article · Mon Nov 15 04:00:00 EST 2010 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3503772· OSTI ID:21531982

Katanuma, I; Yagi, K; Haraguchi, Y; Ichioka, N; Masaki, S; Ichimura, M; Imai, T ^[1]

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1. Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577 (Japan)

The flute instability and the associated radial transport are investigated in the tandem mirror with a divertor mirror cell (the GAMMA10 A-divertor) with help of computer simulation, where GAMMA10 is introduced [Inutake et al., Phys. Rev. Lett. 55, 939 (1985)]. The basic equations used in the simulation were derived on the assumption of an axisymmetric magnetic field. So the high plasma pressure in a nonaxisymmetric minimum-B anchor mirror cell, which is important for the flute mode stability, is taken into account by redefining the specific volume of a magnetic field line. It is found that the flute modes are stabilized by the minimum-B magnetic field even with a divertor mirror although its stabilizing effects are weaker than that without the divertor mirror. The flute instability enhances the radial transport by intermittently repeating the growing up and down of the Fourier amplitude of the flute instability in time.

• OSTI ID: 21531982
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 11 Vol. 17; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AXIAL SYMMETRY
COMPUTERIZED SIMULATION
DIVERTORS
FLUTE INSTABILITY
INSTABILITY
MAGNETIC FIELDS
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA PRESSURE
PLASMA SIMULATION
SIMULATION
SYMMETRY
TANDEM MIRRORS
THERMONUCLEAR DEVICES