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Experimental and Theoretical Research on Dense Z-Pinches

密集 Z 形箍缩的实验和理论研究

基本信息

批准号：
10044178
负责人：
MIYAMOTO Tetsu
金额：
$ 6.46万
依托单位：
Nihon-University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10044178/
关键词：
z-pinch plasma focus sheet z-pinch gas-puff z-pinch nertron measurement X-ray measurement X-ray spectrograph simulation 中性子測定 X線分光測定高温プラズマ

项目摘要

The plasma focus, dense sheet and gas-puff z-pinches were investigated experimentally and theoretically. Main results are the following :(1) The compact plasma focus gave neutrons yield that was much more than that implied in the scaling law obtained in the plasma focus devices with medium discharge energy.(2) The Simulation codes of necking of z-pinch, plasma focus and gas-puff z-pinches were created.(3) The influence of the various parameters to the optimum condition of plasma focus has been studied in detail so far, but cathode effects have hardly been studied systematically, in the present research, the two types of cathodes - grid-like cathode consisted of sixteen Cu bars and cylindrical tube cathode - were applied to the plasma focus device. It was shown that the structural difference clearly affected the optimum condition of focus(4) To suppress the instabilities in conventional cylindrical z-pinches, the dense sheet z-pinches were proposed. The basic features of ideal sheet z-pinch with infinite width were given. There are two types of real sheet z-pinches - the stretched and compressional types. Their stability and the possibility as fusion plasma were examined.(5) in the experiment on the stretched-type sheet z-pinch, the sheet z-pinch plasma was created at the appropriate initial pressure region.

对等离子体焦点、致密片和喷气z箍缩进行了实验和理论研究。主要结果如下：（1）紧凑的等离子体聚焦装置产生的中子产额远大于中等放电能量等离子体聚焦装置的中子产额。(2)编制了z箍缩缩、等离子体聚焦和喷气z箍缩的模拟程序。(3)迄今为止，人们已经详细研究了各种参数对等离子体聚焦最佳条件的影响，但对阴极效应的系统研究还很少。本研究将两种类型的阴极--由16根Cu棒组成的栅状阴极和圆柱形管状阴极--应用于等离子体聚焦装置。结果表明，结构的差异明显地影响了聚焦的最佳条件。（4）为了抑制传统圆柱z箍缩的不稳定性，提出了致密片z箍缩。给出了无限宽理想薄板z箍缩的基本特征。存在两种类型的真实的板Z箍缩-拉伸型和压缩型。考察了它们的稳定性和作为聚变等离子体的可能性。(5)在拉伸型片状Z箍缩的实验中，在适当的初始压力区域产生片状Z箍缩等离子体。