Loss of plasma scaling with magnetic field, pressure and discharge current in a CUSP confined plasma
作者:A. Anukaliani、V. Selvarajan
DOI:10.1051/epjap:2001183
日期:2001.9
The confinement properties of a low beta argon discharge plasma in a spindle cusp magnetic field was investigated. Plasma was produced by ionisation collisions by the electrons which were produced by thermionic emission of electrons. The central problem involved with plasma confinement by a cusped magnetic field is the loss of particles along the flux lines. Electron and ion leak widths were studied in the ring and point cusps and measured over a range of magnetic field strengths (B), neutral pressures (P) and discharge currents (Id). It was found that the leak width was reduced with increase in Id and B. The ion leak widths were found to be larger than the electron leak widths. The normalised effect of magnetic field and pressure on ion and electron leak widths in cusps are reported, compared and discussed. The dependence of electron and ion leak widths on plasma densities were also studied. At very low pressures, high plasma densities and high magnetic field strengths, a quasineutrality condition was attained.
研究了主轴尖顶磁场中低β氩放电等离子体的约束特性。等离子体是通过热电子发射产生的电子的电离碰撞产生的。等离子体被尖角磁场约束的核心问题是粒子沿磁通线的损耗。对环形和点状尖顶的电子和离子泄漏宽度进行了研究,并在一定的磁场强度(B)、中性压力(P)和放电电流(Id)范围内进行了测量。研究发现,泄漏宽度随着 Id 和 B 的增加而减小。离子泄漏宽度大于电子泄漏宽度。报告、比较和讨论了磁场和压力对尖晶石中离子和电子泄漏宽度的归一化影响。还研究了电子和离子泄漏宽度与等离子体密度的关系。在极低的压力、高等离子体密度和高磁场强度下,达到了准中性条件。