Finding the radial parallel temperature profile in a non-neutral plasma using equilibrium calculations on experimental data
Finding the radial parallel temperature profile in a non-neutral plasma using equilibrium calculations on experimental data
复制标题
使用实验数据的平衡计算找到非中性等离子体中的径向平行温度分布
DOI：
10.1063/1.2167586
复制
发表时间：
2006
影响因子：
2.2
通讯作者：
B. G. Peterson
中科院分区：
文献类型：
--
作者：
G. W. Hart;B. G. Peterson
1992年，埃格莱斯顿et al. [D. L.埃格莱斯顿等人，Phys. Fluids B 4，3432（1992）]报道了一种用于通过将等离子体部分倾倒到阱端部的电荷收集器上来测量限制在Malmberg-Penning阱中的纯电子等离子体中的径向温度分布的技术。对于短等离子体和短约束环，他们的论文中的假设是违反的，需要一个更一般的计算。本文提出了一种改进的标准平衡计算方法，用以计算纯电子等离子体的温度分布。发现埃格莱斯顿的捷径“蒸发”温度法需要一个校正因子，该因子可使用本文所述的方法计算。对于典型的条件，蒸发方法夸大了实际温度的一个因素，从1.1到1.5或更多，这取决于等离子体的总电荷和温度以及阱的几何形状。
In 1992, Eggleston et al. [D. L. Eggleston et al., Phys. Fluids B 4, 3432 (1992)] reported on a technique for measuring the radial temperature profile in a pure-electron plasma confined in a Malmberg-Penning trap by partially dumping the plasma onto a charge collector at the end of the trap. For short plasmas and short confining rings, the assumptions in their paper are violated and a more general calculation is needed. This paper presents a variation of the standard equilibrium calculation to find the temperature profile of a pure-electron plasma. Eggleston’s shortcut “evaporation” temperature method is found to require a correction factor that can be calculated using methods described in this paper. For typical conditions, the evaporation method overstates the actual temperature by a factor ranging from 1.1 to 1.5 or more, depending on the plasma’s total charge and temperature and the geometry of the trap.