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

重离子束（HIB）被认为是惯性聚变反应堆能量驱动器的一种很有前途的候选源。我们研究了基于重复可控感应调制器技术发展的加速器系统。本文提出了一种由五个单元组成的感应电压调制器，并成功地用感应加法器实现了它的工作。它被用来作为模拟梁的物理问题，在运输线上的纵向梁压缩。使用粒子模拟代码，我们还调查了在HIB加速器中的束流操作过程中的束流物理问题。其中一个结果表明，在加速器的最后阶段，空间电荷引起的不稳定性会增加束流发射度。与激光聚变相比，重离子聚变中驱动束与靶的相互作用区域更密集。为了研究暖密态等离子体物理，利用脉冲功率装置产生了高密度和高温等离子体。我们发现，适当的慢化高功率离子束可以使一个定义良好的等离子体在很宽的范围内的密度-温度状态的目标材料。

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.