Plasma equilibrium in axisymmetric open divertor configurations

Arsenin, V. V.; Kuyanov, A. Yu.

doi:10.1134/1.1309470

Cited by 7 publications

(9 citation statements)

References 2 publications

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“…This is to make a divertor magnetic field inside the GAMMA10 where the case of central cell divertor design was carried out by taking into account the plasma equilibrium. 19 Historically the equilibrium calculation has been carried out in various divertor mirror cells for isotropic pressure plasma, 20 for anisotropic pressure plasma 19,21 and for kinetic KruskalOberman stability theory with anisotropic pressure. 22 The theoretical study of flute mode stability by a magnetic divertor was done first by Lane et al 23 The subsequently the theory was extended by Pastukhov and Sokolov 24 by taking into account the nonparaxial magnetic filed line curvature and then was extended further more by Sasagawa et al 25 by including the anisotropic ion temperature effects.…”

Section: Introductionmentioning

confidence: 99%

Flute mode fluctuations in the divertor mirror cell

et al. 2010

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The computer code by reduced magnetohydrodynamic equations were made which can simulate the flute interchange modes ͑similar to the Rayleigh-Taylor instability͒ and the instability associated with the presence of nonuniform plasma flows ͑similar to the Kelvin-Helmholtz instability͒. This code is applied to a model divertor and the GAMMA10 ͓M. Inutake et al., Phys. Rev. Lett. 55, 939 ͑1985͔͒ with divertor in order to investigate the flute modes in these divertor cells. The linear growth rate of the flute instability determined by the nonlocal linear analysis agrees with that in the linear phase of the simulations. There is a stable nonlinear steady state in both divertor cells, but the nonlinear steady state is different between the model divertor and the GAMMA10 with divertor.

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Section: Introductionmentioning

confidence: 99%

Flute mode fluctuations in the divertor mirror cell

et al. 2010

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“…The results in Ref. [105] suggest that longitudinal currents at the ends of a corrugated solenoid with magnetic mirrors may also be absent.…”

Section: Prospects Of the Ambipolar Fusion Reactormentioning

confidence: 99%

“…When the plasma pressure at the plasma periphery gradually decreases with increasing radius, the stabilizing effect of the conducting walls weakens. Basing their reasoning on the results in Refs [79,105] for a certain class of radial pressure profiles in a solenoid without magnetic mirrors, Arsenin and Kuyanov [105] derived formulas for the dependence of the threshold value of b for the stability of the m 1 mode on the thickness of the peripheral transition layer for different values of r w ar p . As the peripheral pressure profile changes from a distinct boundary to a smooth transition with the thickness of the order of the plasma radius at r w 1X3r p , the threshold value of b increases from 0.6 to approximately 0.82.…”

Section: Prospects Of the Ambipolar Fusion Reactormentioning

confidence: 99%

The ambipolar trap

Dimov¹

2005

Phys.-Usp.

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PACS. 68.00 -Surfaces and interfaces; thin films and whiskers.PACS. 68.30 -Dynamics of solid surfaces and interface vibrations.Abstract. -For the Au(ll0)-reconstructed surface we present a comparison of surface phon02modes measured with inelastic He-scattering and calculated from first principles. For the r point use of bulk force constants does not explain the observed vibrational modes, while the microscopic first principles results give good agreement with the experiment. In contrast to recent results obtained with the semiempirical <

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“…The design of a magnetic divertor is a recent issue in the attempt to improve the radial confinement of the GAMMA10 tandem mirror 14 with the developments of the theoretical study. 15,16 Experiments on the magnetic divertor were carried out at the TARA tandem mirror 17 in which complete divertor stabilization of the central cell plasma was not achieved in these experiments because the plasma pressure was localized near the axis, but some indirect evidence of stabilizing influence was observed. In contrast, the HIEI tandem mirror 18 has been able to stabilize the interchange modes with wider plasma density radial profiles.…”

Section: Introductionmentioning

confidence: 99%

Magnetic-divertor stabilization of an axisymmetric plasma with anisotropic temperature

et al. 2006

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Magnetohydrodynamic stabilization of an axisymmetric mirror plasma with a magnetic divertor is studied. An equation is found for the flute modes, which includes the stabilizing influence of ion temperature anisotropy and nonparaxial magnetic fields, as well as a finite ion Larmor radius. It is shown that if the density profile is sufficiently gentle, then the nonparaxial configuration can stabilize all modes as long as ion temperature is radially uniform. This can be demonstrated even when the density vanishes on the separatrix and even for small ion Larmor radii. It is found, however, that the ion temperature gradient makes the unstable region wider; high ion temperature is required to stabilize the flute mode.

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Plasma equilibrium in axisymmetric open divertor configurations

Cited by 7 publications

References 2 publications

Flute mode fluctuations in the divertor mirror cell

Flute mode fluctuations in the divertor mirror cell

The ambipolar trap

Magnetic-divertor stabilization of an axisymmetric plasma with anisotropic temperature

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