Consideration on the accelerator system for heavy ion fusion based on induction voltage modulator

重离子束被认为是一种很有前途的惯性聚变反应堆能量驱动源。研究了基于重复可控感应调制器技术发展的加速器系统。采用感应加法器的几何结构，构造了一个由5个单元组成的感应电压调制器，并成功运行。将其作为模拟输油管纵梁压缩过程中梁的物理问题的方法。使用粒子模拟代码，我们还研究了HIB加速器中光束操作过程中的光束物理问题。其中一个结果表明，空间电荷诱导的不稳定性可以增加加速器最后阶段的束流发射度。在重离子聚变中，与激光聚变相比，驱动光束在更密集的区域与目标相互作用。为了研究热致密状态下等离子体的物理特性，利用脉冲功率装置产生了高密度和/或高温状态下的等离子体。研究表明，适当调节的高功率离子束可以在目标材料的密度温度状态的广泛范围内产生定义良好的等离子体。

Heavy Ion Beam (HIB) is considered to be a promising candidate for energy driver of inertial fusion reactor. We have investigated the accelerator systems based on the technological development of repetitive and controllable induction modulator. An induction voltage modulator composed of 5-units was constructed and successfully operated with induction adder geometry. It was used as a simulator for beam physical problems during longitudinal beam compression in the transport line. Using a particle simulation code, we also investigated beam physical issues during beam manipulation in the HIB accelerator. One of the results indicates that space charge induced instability can increase the beam emittance during the final stage of the accelerator. In the case of heavy ion fusion, the driver beam interacts with target at much denser region compared with that of laser fusion. In order to investigate the plasma physics at warm dense state, plasmas at high density and/or high temperature state are produced using pulse power devices. We showed that properly moderated high power ion beams can make a well defined plasma over a wide range of density-temperature states of target materials.