高重复率超短脉冲高压源研究

项目名称： 高重复率超短脉冲高压源研究

项目编号： No.11505200

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 刘熔

作者单位： 中国科学院高能物理研究所

项目金额： 23万元

中文摘要： 脉冲功率源的应用覆盖粒子加速器束流产生、加速、踢束、注入引出、振荡抑制等多个环节。针对某些特殊需求发展起来的脉冲功率源所使用的新方法在一定程度上引领了该项技术的发展。除常规技术指标如：输出电压幅度、持续时间、脉冲平整度、重复频率、上升/下降沿的时间等技术参数外，合理的阻抗设计、可灵活调整的脉冲宽度和工作模式、以及高可靠性等指标在加速器的脉冲功率源设计中至关重要。在缩短脉冲持续时间且减小脉冲沿的需求之下（至纳秒或者亚纳秒量级），存在幅度平整度、重复频率提升方面的技术瓶颈，这需要我们从超短脉冲高压产生、传输、波形整形与控制等多个基本环节上打破常规，寻找技术突破口。本项目拟研制的高重复率超短脉冲高压源将采用全新的方法，把非线性传输线与宽带的大功率固态器件结合，控制子单元增益并补偿相位，采用宽带微波线路设计方法大幅度提升短脉冲功率源在重复频率、平整度、波形可调可控方面的技术指标。

中文关键词： 粒子加速器；超短脉冲高压；固态功率放大器；非线性传输线

英文摘要： Pulsed power sources are used in particle accelerator field for beam generation, acceleration, kicking beam, injection and extraction, oscillation suppression etc. To a certain extent， the pulsed power source in accelerators for some specialized requirement has been considered as the leading edge of this technology. Although the output amplitude , pulse duration , flatness, repetition frequency , pulse edge are considered as key technical parameters, the rational design of impedance , flexible pulse width adjustment and fine control on waveform shape, working patterns, and high reliability are also critical for accelerator high voltage pulsed power source. To get shorter pulse duration and reducing the pulse edge(to the scale of nanoseconds or sub-nanosecond) , the contradiction will occurs when keeping flatness and rising repetition rate, so we need to break the routine on the original design for power generation, transmission, and pulse forming network etc. , to seek new breakthrough. This project intends to develop a high repetition rate ultra-short pulsed power source with new methods such as combing a nonlinear transmission line with broadband high power solid state power amplifier, compensation the gain and phase for sub-units, taking some broadband microwave circuit design methods. Those will greatly enhance the repetition rate, flatness and controllability.

英文关键词： Particle accelerators;ultra-short high voltage pulse;solid state amplifier;nonlinear transmission line