Fundamental Study of Bidirectional Pulse Generator System for Linear Induction Accelerators

直线感应加速器双向脉冲发生器系统的基础研究

基本信息

批准号：
09450109
负责人：
HOTTA Eiki
金额：
$ 9.09万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09450109/
关键词：
LIA Bidirectional Pulser Laser Trigger Vacuum Switch Gas Gap Switch Parallel Switch

项目摘要

The objective of this study is to get fundamental characteristics of a bidirectional pulse generator system for external pulse injection and to realize the system for linear induction accelerators. The bidirectional pulse generator system consists of a pulse generator, a cavity and a load. To realize the system, effects of each component of the pulse generator on the output waveform (accelerating voltage waveform) should be investigated. Using an equivalent circuit, the output voltage waveform was simulated. The results were compared with the experimental results obtained using a dummy load, which consists of a resistor and a diode connected in series. As a result, it was found that the inductance of output switch affected the output waveform very much and to get an ideal waveform, the inductance should be reduced. To reduce the inductance, parallel operation of switches is effective.A laser-triggered switch is known to be adequate for parallel operation, because it has low delay and low jitter. Therefore, characteristics of a laser-triggered switch filled with air, SF_6 or evacuated are experimentally investigated. A Q-switched Nd:YAG laser was used, the wavelength of which is 1064nm, the maximum output energy is 650mJ, and the pulse width is 5-7ns. The third harmonics was also used. Comparing the results obtained with focused and non-focused laser beams, it was shown that the gap separation length was not so long in our case to reveal the difference of the characteristics.Using a double cavity and an LC inversion generator, an accelerating voltage of 40kV was obtained across the dummy load. A device, which can be used for synchronous operation between the laser and the pulse generator, was made and it is planned to change the current switch and to investigate the characteristics of the bidirectional pulse generator system with a laser-triggered switch.

这项研究的目的是获得用于外部脉冲注射的双向脉冲发生器系统的基本特征，并实现线性感应加速器的系统。双向脉冲发生器系统由脉冲发生器，腔和负载组成。为了实现系统，应研究脉冲发生器每个组件对输出波形的影响（加速电压波形）。使用等效电路，模拟了输出电压波形。将结果与使用虚拟负载获得的实验结果进行了比较，该结果由电阻和二极管组成。结果，发现输出开关的电感极大地影响了输出波形并获得理想的波形，应降低电感。为了降低电感，开关的并行操作有效。已知激光触发的开关足以平行操作，因为它具有低延迟和低抖动。因此，通过实验研究了充满空气，SF_6或撤离的激光触发开关的特征。使用了Q开关ND：YAG激光器，其波长为1064nm，最大输出能为650mJ，脉冲宽度为5-7NS。也使用了第三个谐波。比较与聚焦和非关注激光束获得的结果，证明间隙分离长度在我们的情况下并不长以揭示特性的差异。使用双腔和LC反转发生器，在整个dumm载荷中获得了40KV的加速电压。制作了一种可用于激光和脉冲发生器之间同步操作的设备，并计划更改当前开关，并使用激光触发的开关调查双向脉冲发生器系统的特性。