A fast tuning method for a RFQ accelerator with ramped inter-vane voltage
A fast tuning method for a RFQ accelerator with ramped inter-vane voltage
复制标题
DOI：
10.1016/j.nima.2013.05.179
复制
发表时间：
2013-10
影响因子：
1.4
通讯作者：
L. Du;Q. Xing;S. Zheng;X. Guan;C. Tang
中科院分区：
文献类型：
--
作者：
L. Du;Q. Xing;S. Zheng;X. Guan;C. Tang
本文研究了四叶片斜波加速器的快速调谐方法。在四叶双极加速器中，场分布主要由四极模场和偶极模场组成。调谐的目的是通过改变这些模式的比例来获得工作频率，并将叶片间电压分布调整到设计曲线。在本文中，传输线模型的双折射的所有这些模式的场分布的描述。然后应用微扰理论计算了调谐器对场分布的影响。在此基础上，总结了调谐方法，并编制了计算机程序THURT（TsingHua University Tunnel），完成了基于矩阵运算的所有计算。本文介绍了清华大学紧凑脉冲强子源（CPHS）工程中强子加速器的调谐实验。并对该方法的优缺点进行了讨论。
This article is devoted to the study of a fast tuning method for the four-vane RFQ (Radio Frequency Quadrupole) accelerator with ramped-voltage. In the four-vane RFQ accelerator, the field distribution is formed mainly by the field of quadrupole modes and dipole modes. The purpose of tuning is acquiring the operating frequency and adjusting the inter-vane voltage distribution to the designed curve by changing the proportion of these modes. In this article, the transmission-line model of the RFQ is presented to describe the field distribution of all these modes. Then the perturbation theory is applied to calculate the effect of the tuners on the field distributions. On the basis of these analyses, the tuning method has been concluded and a computer program THURT (TsingHua University RFQ Tune) has been composed to perform all the calculations based on matrix operations. The tuning experiment carried out on the RFQ accelerator of the CPHS (Compact Pulsed Hadron Source) project at Tsinghua University is described. The merits and drawbacks of this method are also discussed.