SDR, EVC, and SDREVC: Limitations and Extensions
Abstract
Methods for reducing the radius, temperature, and space charge of nonneutral plasma are usually reported for conditions which approximate an ideal Penning Malmberg trap. Here we show that (1) similar methods are still effective under surprisingly adverse circumstances: we perform SDR and SDREVC in a strong magnetic mirror field using only 3 out of 4 rotating wall petals. In addition, we demonstrate (2) an alternative to SDREVC, using e-kick instead of EVC and (3) 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.
Cite
@article{arxiv.2306.00862,
title = {SDR, EVC, and SDREVC: Limitations and Extensions},
author = {E. D. Hunter and C. Amsler and H. Breuker and M. Bumbar and S. Chesnevskaya and G. Costantini and R. Ferragut and M. Giammarchi and A. Gligorova and G. Gosta and H. Higaki and C. Killian and V. Kraxberger and N. Kuroda and A. Lanz and M. Leali and G. Maero and C. Malbrunot and V. Mascagna and Y. Matsuda and V. Mäckel and S. Migliorati and D. J. Murtagh and A. Nanda and L. Nowak and F. Parnefjord Gustafsson and S. Rheinfrank and M. Romé and M. C. Simon and M. Tajima and V. Toso and S. Ulmer and L. Venturelli and A. Weiser and E. Widmann and Y. Yamazaki and J. Zmeskal},
journal= {arXiv preprint arXiv:2306.00862},
year = {2023}
}
Comments
Version 2: a small discrepancy between the N values for Table 1 and Fig. 3 led to an investigation of the charge counting diagnostic. There is a small energy dependence which only became apparent following improvements to pre-SDREVC. The pulsed dump was modified to reduce this dependence. The data for Table 1 and Fig. 3 was taken again with the improved methods