期刊
JOURNAL OF PLASMA PHYSICS
卷 89, 期 5, 页码 -出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0022377823001022
关键词
plasma properties
In this study, we investigate methods for reducing the radius, temperature, and space charge of a non-neutral plasma under adverse conditions. Our findings show that the strong drive regime (SDR) compression and SDREVC methods are still effective even when using only 3 out of 4 rotating wall petals in a strong magnetic mirror field. We also propose an alternative method to SDREVC by using e-kick instead of evaporative cooling (EVC), and determine an upper limit for how much plasma can be cooled to T < 20 K using EVC, which depends on the space charge rather than the number of particles or plasma density.
Methods for reducing the radius, temperature and space charge of a non-neutral plasma are usually reported for conditions which approximate an ideal Penning Malmberg trap. Here, we show that (i) similar methods are still effective under surprisingly adverse circumstances: we perform strong drive regime (SDR) compression and SDREVC in a strong magnetic mirror field using only 3 out of 4 rotating wall petals. In addition, we demonstrate (ii) an alternative to SDREVC, using e-kick instead of evaporative cooling (EVC) and (iii) an upper limit for how much plasma can be cooled to T < 20 K using EVC. This limit depends on the space charge, not on the number of particles or the plasma density.
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