Development on FRC Plasma Sustainment Method for Helium-3 Fusion

实现氘氦3聚变需要发展50%以上的高β等离子体结构，而不是像托卡马克那样的低热环体。目的满足场反构型（FRC）血浆的要求，其β值为90%。FRC研究中最关键的问题之一是寻找FRC等离子体的维持途径。目的是研究约束的特性和改进，发展中性束注入和磁压缩的方法。结果1。许多仪器对粒子约束时间进行了深入研究，发现其约束时间为0.3ms。随着反射比的增加，时间也会延长。2. 在磁压缩实验中；80%的轴压提供了适合熔芯的更厚的FRC形状，并表现出约束时间的延长。3. 通过开发一种具有IGBT控制的新型电源，安装了一台500KW级的大功率光束喷射器。目前，有关注入的物理数据是在低功率下获得的，这需要开发一些新的粒子探测器。

Back ground Realization of deuterium-helium-3 fusion requires the development of high-beta plasma configuration above 50%, insead of low-beata toroids like as tokamaks.Objective For the requirement a field-reversed-configuration (FRC) plasma has been acceptable, which has the beta value of 90%. One of the most crucial problems in FRC study is to found the rout to the sustainment of the FRC plasma. It is, for the purpose, to study the characteristics and the improvement of the confinement, and to develop the methods of neutral beam injection and magnetic compression.Results 1. The particle confinement time has been intensively studied by many instruments, and is found to be 0.3ms. Also, the time could be extended with increasing of the mirror ratio. 2. In the magnetic compression experiment ; 80% axial compression has offered the more fat FRC shape suitabe for the fusion core, and exibites the extention of confinement time. 3. By development of a new power suplier with IGBT control, a high power beam injector of 500KW class has been installed. Physics data on the injection are now being obtained in a low level power, where it is needed to develop some new particle detector.