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arXiv physics/0609125physics.plasm-ph
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补偿负离子束中的物理过程及相关的束流输运问题

Physical Processes in Compensated Negative-Ion Beams and Related Beam Transport Problems

I. A. Soloshenko, V. N. Gorshkov, A. M. Zavalov

摘要:

本文综述了补偿负离子束物理过程的理论和实验研究现状。一位作者在参考文献[1]中发表了先前的综述。本文综述了负离子束稳态电场数值计算的最新结果和低气压下抑制离子-离子不稳定性的实验研究的最新结果。与文献[1]一样,本文讨论了补偿束物理学的三个主要问题:1)稳定束中的空间电荷补偿; 2)离子源中等离子体不稳定性引起的束流调制引起的空间电荷动态补偿; 3)集体过程。在这篇评论中提出的结果,使一个确定如何非补偿空间电荷,非共振振荡的束流,和集体振荡的离子束等离子体的影响束的传播特性。利用这些信息,可以确定最佳的离子传输参数。

英文摘要:

This paper reviews resent theoretical and experimental research on physical processes in compensated negative-ion beams. A previous review was published by one of the authors in Ref. [1]. The present paper summarizes the new results of numerical calculations of the stationary electric field in negative-ion beams, and the resent results of experimental studies of suppression of ion-ion instability at low gas pressures. As in Ref. [1], the review addresses the following three main issues of the physics of compensated beams: 1) Spatial charge compensation in steady beams; 2) Dynamic decompensation of spatial charge, which occurs as a result of beam current modulation due to plasma instabilities in the ion source; 3) Collective processes. The results presented in this review enable one to determine how non-compensated spatial charge, nonresonant oscillations of the beam current, and collective oscillations of the ion-beam plasma influence the propagation properties of the beam. With this information, one can determine the optimal ion transportation parameters.

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