Experimental confirmation of stable, small-debye-length, pure-electron-plasma equilibria in a stellarator
Experimental confirmation of stable, small-debye-length, pure-electron-plasma equilibria in a stellarator
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DOI：
10.1103/physrevlett.97.095003
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发表时间：
2006-09-01
影响因子：
8.6
通讯作者：
Marksteiner, Q.
中科院分区：
文献类型：
--
作者：
Kremer, J. P.;Pedersen, T. Sunn;Marksteiner, Q.
据报道，在仿星器中产生了第一个小德拜长度的低温纯电子等离子体。测量到的约束时间为20毫秒。长约束时间意味着宏观稳定平衡的存在，并且单粒子轨道被很好地约束，尽管在哥伦比亚非中性环面装置中缺乏准对称。这证实了强电场的有益约束效应和由此产生的电子的快速ExB旋转。目前，粒子约束时间受限于等离子体中存在的大块绝缘材料，而不是任何固有的等离子体输运过程。在等离子体的内部可以看到一个近乎平坦的温度分布。
The creation of the first small-Debye length, low temperature pure electron plasmas in a stellarator is reported. A confinement time of 20 ms has been measured. The long confinement time implies the existence of macroscopically stable equilibria and that the single particle orbits are well confined despite the lack of quasisymmetry in the device, the Columbia non-neutral torus. This confirms the beneficial confinement effects of strong electric fields and the resulting rapid ExB rotation of the electrons. The particle confinement time is presently limited by the presence of bulk insulating materials in the plasma, rather than any intrinsic plasma transport processes. A nearly flat temperature profile is seen in the inner part of the plasma.