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.

本研究的目的是获得用于外部脉冲注入的双向脉冲发生器系统的基本特性，并实现用于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、腔体和负载组成。为了实现该系统，应该研究脉冲发生器的每个组件对输出波形（加速电压波形）的影响。使用等效电路模拟输出电压波形。结果与使用假负载获得的实验结果进行了比较，假负载由串联的电阻器和二极管组成。结果发现，输出开关的电感对输出波形影响很大，为了得到理想的波形，应减小电感。为了减少电感，开关的并联操作是有效的。众所周知，激光触发开关适合并联操作，因为它具有低延迟和低抖动。因此，对充满空气、SF_6或抽真空的激光触发开关的特性进行了实验研究。采用调Q Nd:YAG激光器，波长1064nm，最大输出能量650mJ，脉冲宽度5-7ns。还使用了三次谐波。比较聚焦和非聚焦激光束获得的结果，结果表明，在我们的例子中，间隙分离长度并没有那么长，从而揭示了特性的差异。使用双腔和 LC 反转发生器，加速电压为通过假负载获得 40kV 电压。制作了一种可实现激光器与脉冲发生器同步工作的装置，拟改变电流开关，研究激光触发开关双向脉冲发生器系统的特性。