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arXiv 1601.06508physics.acc-ph
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中国ADS质子直线加速器注入器II瞬态束流负载补偿研究

Study on transient beam loading compensation for China ADS proton linac injector II

Zheng Gao, Yuan He, Xian-Wu Wang, Wei Chang, Rui-Feng Zhang, Zheng-Long Zhu, Sheng-Hu Zhang, Qi Chen, Tom Powers

摘要:

在2014年10月至12月在中国科学院近代物理研究所进行的加速器驱动次临界(ADS)系统注入器原型II的束流调试测试期间,观察到了显著的瞬态束流加载效应。在这些测试中,实验进行了CW操作的腔与脉冲束电流,该系统被配置为利用一个原型数字低电平射频(LLRF)控制器。该系统最初是在脉冲模式下使用简单的PID反馈控制算法操作的,该算法在脉冲10 mA射束操作期间不能保持期望的梯度调节。采用PI反馈和前馈控制相结合的方法,实现了一种简单的束流瞬态负载补偿方法,以显著减小腔梯度中的束流瞬态效应。采用该控制算法后,超导腔场的变化率小于1.7%。本文介绍了该系统的设计和实验结果。

英文摘要:

Significant transient beam loading effects were observed during beam commissioning tests of prototype II of the injector for the Accelerator Driven Sub-critical (ADS) system, which took place at the Institute of Modern Physics, Chinese Academy of Sciences, between October and December 2014. During these tests experiments were performed with CW operation of the cavities with pulsed beam current, and the system was configured to make use of a prototype digital low level radio frequency (LLRF) controller. The system was originally operated in pulsed mode with a simple PID feedback control algorithm, which was not able to maintain the desired gradient regulation during pulsed 10 mA beam operations. A unique simple transient beam loading compensation method which made use of a combination of PI feedback and feedforward control algorithm was implemented in order to significantly reduce the beam induced transient effect in the cavity gradients. The superconducting cavity field variation was reduced to less than 1.7% after turning on this control algorithm. The design and experimental results of this system are presented in this paper.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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