Ideal Magnetohydrodynamics Stability Spectrum with a Resistive Wall

[摘要] We show that the eigenvalue equations describing a cylindrical ideal magnetophydrodynamicsw (MHD) plasma interacting with a thin resistive wall can be put into the standard mathematical form: Α•χ = λΒ• χ. This is accomplished by using a finite element basis for the plasma, and by adding an extra degree of freedom corresponding to the electrical current in the thin wall. The standard form allows the use of linear eigenvalue solvers, without additional interations, to compute the complete spectrum of plasma modes in the presence of a surrounding restrictive wall at arbitrary separation. We show that our method recovers standard results in the limits of (1) an infinitely resistive wall (no wall), and (2) a zero resistance wall (ideal wall).

[发布日期] 2008-05-01

[学科分类] 原子、分子光学和等离子物理

[关键词] EIGENVALUES;MAGNETOHYDRODYNAMICS;PLASMA;STABILITY Magnetohydrodynamics