Design of a 5-MA 100-ns linear-transformer-driver accelerator for wire array Z-pinch experiments
Design of a 5-MA 100-ns linear-transformer-driver accelerator for wire array Z-pinch experiments
复制标题
用于线阵列 Z 箍缩实验的 5-MA 100-ns 线性变压器驱动器加速器的设计
DOI：
10.1103/physrevaccelbeams.19.030401
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发表时间：
2016-03-24
影响因子：
1.7
通讯作者：
Chu Yanyun
中科院分区：
文献类型：
--
作者：
Zhou Lin;Li Zhenghong;Chu Yanyun
线性变压器驱动器（LTD）是最近发展起来的脉冲功率技术，在许多应用中显示出巨大的前景。其中包括中国工程物理研究院正在开发的z钳驱动的裂变-聚变混合反应堆。为了支持反应堆的开发工作，我们计划建立一个基于有限差分的加速器，该加速器可优化驱动线阵列z夹紧负载。加速器由6个并联模块组成，每个模块在电压加法器配置中有8个串联0.8 ma LTD腔。真空传输线用于从加法器内部到放置负载的中央真空室。从而消除了传统的堆闪问题。机器高3.2米，包括支架在内外径12米。建立了一个原型腔，并以0.1 Hz的重复频率间歇性地测试了6000多次射击。一种新颖的触发器，其中只需要一个输入触发脉冲，利用内部触发砖，开发并成功验证了这些射击。对加速器进行了全电路建模。仿真结果表明，对于高度为1.5 cm、初始半径为1.2 cm、质量为1 mg的线阵负载，可以在91 ns（10% ~ 90%）内输出电流脉冲至5.2 MA。压缩到初始半径的0.1时，载荷的最大内爆速度为32 cm/μs。最大动能为78 kJ，占电容器中储存电能的11.7%。预计该加速器的辐射能量效率可达20%-30%，为快速Z夹缩和重复率操作加速器技术的研究提供了高效的设备。
The linear-transformer-driver (LTD) is a recently developed pulsed-power technology that shows great promise for a number of applications. These include a Z-pinch-driven fission-fusion-hybrid reactor that is being developed by the Chinese Academy of Engineering Physics. In support of the reactor development effort, we are planning to build an LTD-based accelerator that is optimized for driving wire-array Z-pinch loads. The accelerator comprises six modules in parallel, each of which has eight series 0.8-MA LTD cavities in a voltage-adder configuration. Vacuum transmission lines are used from the interior of the adder to the central vacuum chamber where the load is placed. Thus the traditional stack-flashover problem is eliminated. The machine is 3.2 m tall and 12 m in outer diameter including supports. A prototype cavity was built and tested for more than 6000 shots intermittently at a repetition rate of 0.1 Hz. A novel trigger, in which only one input trigger pulse is needed by utilizing an internal trigger brick, was developed and successfully verified in these shots. A full circuit modeling was conducted for the accelerator. The simulation result shows that a current pulse rising to 5.2 MA in 91 ns (10%–90%) can be delivered to the wire-array load, which is 1.5 cm in height, 1.2 cm in initial radius, and 1 mg in mass. The maximum implosion velocity of the load is 32 cm/μs when compressed to 0.1 of the initial radius. The maximum kinetic energy is 78 kJ, which is 11.7% of the electric energy stored in the capacitors. This accelerator is supposed to enable a radiation energy efficiency of 20%–30%, providing a high efficient facility for research on the fast Z pinch and technologies for repetition-rate-operated accelerators.