Non-interferential Accumulation of Induction Voltage and IREB Generation

感应电压无干扰累积和 IREB 生成

• 批准号: 02650197
• 负责人: HOTTA Eiki
• 金额: $ 1.47万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650197/
• 关键词: Induction voltage; Non-interference; REB; 非干渉重畳; 高電圧矩形パルス; 相対論的電子ビ-ム

In order to improve the shape of high voltage pulse waveforms, which are used to generate monochromatic intense relativistic electron beams (REB), the principle of non-interferential accumulation of induction voltages was studied.In the first year of this research, two pulse forming networks (PFN), the characteristics of them are slightly different, were made. The characteristic impedance, the maximum withstand voltage of them are 100 OMEGA and 180kV, respectively. Using a m13EA\ : agnetic switch, synchronous operation of them and the principle of accumulation of induction voltages were confirmed. However, it was found that the pulse transmission line made of lumped elements acts as a low pass filter. Therefore, when a transmi13EA\ : ssion line is designed, capacitances and inductances of them should be smaller than those of a PFN by a factor of 10.In the second year (final year), the research was focused on the generation of intense REB by using a magnetically insulated gun. Observati … More on with a plastic scintillator confirmed that the shape of the REB was annular. When a brass cathode was used, 13EA\ : the reproducibility of REB generation was not good and the obtained beam current was rather low. On the contrary, when a carbon cathode was used, good reproducibility was obtained. The maximum energy, current and duration time of the REB generated were 100 keV, 100 A and 300 ns, respectively. This is probably caused by the existence of many whiskers on the cathode surface. The value of beam current also depended on the ratio between the insulation and the guide magnetic field strengths. By a computer simulation, the cause was revealed that the trajectries of electrons were much influenced by the ratio and if the ratio is not adequate, electrons hit the anode or the tube wall. Furthermore, the experimentally obtained current was always lower than that predicted by a theory. Not only the mutual collision of electrons but also the instability, the cause of which is not identified, is maybe responsible for.This study revealed the potential of non-interferential accumulation of induction voltages to improve the waveforms of high voltage pulses and that this principle is applicable to the generation of monochromatic intense REB. Less

为了改善产生单色强流相对论电子束的高压脉冲波形，研究了感应电压无干涉积累的原理，在第一年研制了两种特性略有不同的脉冲形成网络（PFN）。它们的特性阻抗和最大耐压分别为100 Ω和180 kV。利用m13EA磁开关，证实了它们的同步工作和感应电压积累的原理。然而，发现由集总元件制成的脉冲传输线充当低通滤波器。因此，在设计传输线时，其电容和电感应比PFN的小10倍。第二年（最后一年）的研究重点是利用磁绝缘电子枪产生强流REB。奥沃帕蒂 ...更多信息 用塑料闪烁体进行的扫描证实了REB的形状是环形的。当使用黄铜阴极时，13EAl：REB产生的再现性不好，并且获得的束流相当低。相反，当使用碳阴极时，获得了良好的再现性。产生的最大能量、电流和持续时间分别为100 keV、100 A和300 ns。这可能是由于阴极表面存在许多晶须所致。束流的值也取决于绝缘和引导磁场强度之间的比率。通过计算机模拟，揭示了电子的能量密度受比例的影响较大，如果比例不够，电子会撞到阳极或管壁。此外，实验获得的电流总是低于理论预测的电流。不仅是相互碰撞的电子，但也不稳定，其原因是不确定的，可能是负责。这项研究揭示了潜在的非干扰积累的感应电压，以改善波形的高压脉冲，这一原则是适用于产生单色强REB。少

项目成果

黒川智司: "自由電子レーザ発振源としてのパルス円筒形電子ビームの発生(II)" プラズマ・核融合学会第8回秋期講演会予稿集. 131-131 (1991)

Satoshi Kurokawa：“作为自由电子激光振荡源的脉冲圆柱形电子束的生成（II）”日本等离子体与聚变科学学会第八届秋季会议记录131-131（1991）。

Jun'ichi Sako: "Generation of Annular Relativistic Electron Beam by MIG" National Convention Record of Plasma Fusion Society. 24aB10. 179 (1991)

Junichi Sako：“MIG 产生环形相对论电子束”等离子聚变协会全国大会记录。

Satoshi Kurokawa: "Generation of Long Pulse, Annular Electron Beam for FEL" National Convention Record of Plasma Fusion Society. 3aC1. 131 (1991)

Satoshi Kurokawa：“FEL 的长脉冲环形电子束的生成”等离子聚变协会全国大会记录。

黒川 智司: "自由電子レ-ザ発振源としてのパルス円筒形電子ビ-ムの発生(II)" プラズマ・核融合学会第8回秋期大会予稿集. 131-131 (1991)

Satoshi Kurokawa：“作为自由电子激光振荡源的脉冲圆柱形电子束的生成（II）”日本等离子体与聚变科学学会第八届秋季会议记录131-131（1991）。