SXFEL装置上速调管输入输出特性曲线的线性化

发布时间：2018-03-13 18:18

本文选题：速调管　切入点：线性化　出处：《核技术》2017年06期 　论文类型：期刊论文

【摘要】：在上海软X射线自由电子激光(Soft X-ray Free-electron Laser,SXFEL)中的微波低电平控制系统中,通过对各速调管的输出信号进行测量和控制,保证加速器的稳定运行并且达到技术指标。另一方面,SXFEL中的脉冲速调管的输入输出特性存在非线性的关系,这种电子管放大器不理想的非线性特性会导致微波低电平(Low Level Radio Frequency,LLRF)控制系统调节的效率降低。基于SXFEL装置,采用基于现场可编程门阵列(Field Programmable Gate Array,FPGA)的数字预失真方法,在LLRF控制系统中设计了一套实现高功率速调管放大器线性化的在线系统。S波段加速装置和其相应的东芝E3730A速调管及高压调制器和低电平系统实地测试结果表明,在LLRF控制系统中建立的在线系统能够有效补偿速调管带来的非线性问题,提高微波低电平控制系统的精度及准确性。
[Abstract]:In the microwave low level control system of soft X-ray Free-electron laser in Shanghai soft X-ray free electron laser, the output signals of each klystron are measured and controlled. On the other hand, the input and output characteristics of pulse klystron in SXFEL are nonlinear. The nonlinearity of this kind of electronic tube amplifier will reduce the regulation efficiency of low Level Radio frequency control system. Based on SXFEL device, the digital predistortion method based on Field Programmable Gate Array (Programmable Gate ArrayFPGA) is adopted. A set of on-line system. S band accelerator and its corresponding Toshiba E3730A klystron, high voltage modulator and low level system are designed in LLRF control system to realize linearization of high power klystron amplifier. The on-line system established in LLRF control system can effectively compensate the nonlinear problem caused by klystron and improve the accuracy and accuracy of microwave low level control system.
【作者单位】：中国科学院上海应用物理研究所;中国科学院大学;
【基金】：国家自然科学基金(No.11675248)资助~~
【分类号】：TN122;TN24

【相似文献】