Magnetospheric vortex formation: self-organized confinement of charged particles.
Magnetospheric vortex formation: self-organized confinement of charged particles.
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DOI：
10.1103/physrevlett.104.235004
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发表时间：
2010-06
影响因子：
8.6
通讯作者：
Zensho Yoshida;H. Saitoh;J. Morikawa;Y. Yano;S. Watanabe;Yuichi Ogawa
中科院分区：
文献类型：
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作者：
Zensho Yoshida;H. Saitoh;J. Morikawa;Y. Yano;S. Watanabe;Yuichi Ogawa
磁层结构产生了各种奇特的等离子体现象，给天体物理学研究带来了难题；与此同时，创新技术可能会利用磁层等离子体的丰富物理特性。我们用悬浮的超导环形磁铁创造了一个“实验室磁层”。在这里，我们展示了带电粒子（电子）自组织一个稳定的漩涡，其中粒子向内扩散以使密度梯度变陡。电子云的旋转持续时间超过300s。由于该系统具有简单的几何结构和自组织特性，在约束单种和多种带电粒子方面具有广泛的应用前景。
A magnetospheric configuration gives rise to various peculiar plasma phenomena that pose conundrums to astrophysical studies; at the same time, innovative technologies may draw on the rich physics of magnetospheric plasmas. We have created a "laboratory magnetosphere" with a levitating superconducting ring magnet. Here we show that charged particles (electrons) self-organize a stable vortex, in which particles diffuse inward to steepen the density gradient. The rotating electron cloud is sustained for more than 300 s. Because of its simple geometry and self-organization, this system will have wide applications in confining single- and multispecies charged particles.