Neoclassical resonant transport of a mirror cell

Abstract

The neoclassical resonant plateau transport in a mirror cell is studied theoretically. The analytical expression for a non-square-well magnetic field is obtained. The analytical result is applied to the GAMMA10 tandem mirror ͓T. Cho, M. Yoshida, J. Kohagura et al., Phys. Rev. Lett. 94, 085002-1 ͑2005͔͒, which consists of several mirror cells in it, and the confinement time due to the neoclassical resonant plateau transport is determined in each mirror cell. It is found that the neoclassical resonant transport of ions trapped in the nonaxisymmetric anchor mirror cell and transition mirror cells is significantly smaller than those trapped in the central cell.

Effect of electrostatic turbulence on magnetic islands

“…Our study uses an initial-value, finite-difference code [20,24] to solve numerically system (14)-(15) (completed by the boundary condition u = const or F y = 0). The code uses a fully implicit multi-grid algorithm (4th order in space and 2nd order in time) constructed using Portable Extendible Toolkit for Scientific Computation (PETSc).…”

Magnetic divertor design in GAMMA10 central cell

“…But it is known that a nonaxisymmetric magnetic field causes neoclassical radial transport in a tandem mirror [3][4][5][6][7][8][9]. An effort to stabilize interchange modes, therefore, must be made in a fully axisymmetric mirror cell.…”

Magnetic-divertor stabilization of an axisymmetric plasma with anisotropic temperature

“…On the other hand, the nonaxisymmetric magnetic field causes the neoclassical radial transport in a tandem mirror. [3][4][5][6][7][8][9] It is desirable to make an effort to stabilize interchange modes in a fully axisymmetric mirror cell. The magnetic divertor with nonparaxial mirror magnetic field is an axisymmetric mirror that is able to stabilize the interchange modes.…”