权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

High Energy Particle Effect on High - Beta FRC Plasma in Mirror Field

镜场中高能粒子对高β FRC等离子体的影响

基本信息

批准号：
03402050
负责人：
GOTO Seiichi
金额：
$ 8.45万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1993
项目状态：
已结题

项目摘要

The purpose of this experimental study is to point out and examine some kinetic effects of high energy particles on FRC plasma confined in a simple magnetic mirror field. The future fusion using helium - 3 resources on the lunar surface is also included in the scope of this work.The FRC formation technique up to the present time since fifteen years ago can be applied only against the quartz discharge tube. The FRC plasma must be translocated in a metal chamber in order to perform the advanced study with a neutral beam injection for instance. It is accomplished by this work that the FRC plasma translated into the large bore metal vessel with a quasi - static field makes the FRC of the four times in radius, the five times in length and the five times in duration which shows the capability of the standard beam injection. The very fast traveling energy in this process can be converted to the internal thermal energy after the movement.The sheath depth outside the confined plasma is found to be of a Larmor radius of the confined ions, which means that the lost plasma behaves as the kinetic motion. The magnetic flux within the escaping radial area at the mirror point coincides with the flux covering the sheath depth. This shows that the escaping plasma flows as fluid motion along the magnetic channel though the sheath formation is due to the kinetic.Additively we find that some slow magnetic fluctuations exist near to the separatrix. This frequency range is different with the theoretical prediction.

本实验研究的目的是指出并检验在简单磁镜场中高能粒子对FRC等离子体的一些动力学效应。未来利用月球表面氦-3资源的聚变也包括在这项工作的范围内。15年前至今的FRC形成技术仅适用于石英放电管。FRC等离子体必须在金属室中转移，以便进行例如中性束注入的高级研究。通过将FRC等离子体注入大口径金属容器的准静态场，使FRC的半径、长度和持续时间分别达到半径的4倍、长度的5倍和持续时间的5倍，显示了标准束流注入的能力。在这个过程中，非常快的行进能在运动后可以转化为内部热能，发现在受限等离子体外的鞘层深度是受限离子的拉莫尔半径，这意味着损失的等离子体表现为动力学运动。镜面点逃逸半径范围内的磁通与覆盖鞘深的磁通重合。这表明逃逸出的等离子体是以流体的形式沿磁道流动的，通过鞘的形成是由于动力学的结果。此外，我们还发现在分隔线附近存在一些缓慢的磁涨落。这一频率范围与理论预测不同。