...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Future beam experiments in themagnetosphere with plasma contactors: The electron collection and ion emission routes
【24h】

Future beam experiments in themagnetosphere with plasma contactors: The electron collection and ion emission routes

机译：未来在themagnetosphere梁实验等离子体接触器:收集和电子离子发射路线

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Experiments where a high-voltage electron beam emitted by a spacecraft in the low-density magnetosphere is used to probe the magnetospheric configuration could greatly enhance our understanding of the near-Earth environment. Their challenge, however, resides in the fact that the background magnetospheric plasma cannot provide a return current that balances the electron beam current without charging the spacecraft to such high potential that in practice prevents beam emission. In order to overcome this problem, a possible solution is based on the emission of a high-density contactor plasma by the spacecraft prior to and after the beam. We perform particle-in-cell simulations to investigate the conditions under which a high-voltage electron beam can be emitted from a magnetospheric spacecraft, comparing two possible routes that rely on the high-density contactor plasma. The first is an "electron collection" route, where the contactor has lower current than the electron beam and is used with the goal of connecting to the background plasma and collecting magnetospheric electrons over a much larger area than that allowed by the spacecraft alone. The second is an "ion emission" route, where the contactor has higher current than the electron beam. Ion emission is then enabled over the large quasi-spherical area of the contactor cloud, thus overcoming the space charge limits typical of ion beam emission. Our results indicate that the ion emission route offers a pathway for performing beam experiments in the low-density magnetosphere, while the electron collection route is not viable because the contactor fails to draw a large neutralizing current from the background.
机译：实验在高压电子束宇宙飞船发出的低密度磁气圈是用来探测地球可以大大提高我们的配置对近地环境的理解。然而,他们的挑战,驻留在一个事实背景的磁性层的等离子体不能提供一个返回电流平衡电子束电流不收费宇宙飞船如此高的潜力实践使光束发射。解决这个问题,一个可能的解决方案基于高密度接触器的发射等离子体的飞船之前和之后光束。调查的条件高压电子束可以发出磁性层的航天器,比较两种可能路径依赖的高密度接触器等离子体。路线,接触器有较低的电流比电子束和使用的目标连接到等离子体和背景收集电子磁性层的多面积超过允许的飞船一个人。接触器的电流高于在哪里电子束。大quasi-spherical区域的接触器云,从而克服了空间电荷限制典型的离子光束发射。表明,离子发射路线提供了途径进行梁实验低密度磁气圈,而电子路线是不可行的,因为集合接触器不能画一个大的中和当前的背景。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号