Use of phase information with a stepper motor to control frequency for tuning system of the Front End Test Stand Radio Frequency Quadrupole at Rutherford Appleton Laboratory
Use of phase information with a stepper motor to control frequency for tuning system of the Front End Test Stand Radio Frequency Quadrupole at Rutherford Appleton Laboratory
复制标题
DOI：
10.1016/j.nima.2014.12.023
复制
发表时间：
2015-03
影响因子：
1.4
通讯作者：
S. Alsari;M. Aslaninejad;J. Pozimski
中科院分区：
文献类型：
--
作者：
S. Alsari;M. Aslaninejad;J. Pozimski
为了在英国卢瑟福阿普尔顿实验室的前端测试台（FETS）直线加速器项目，设计了一个4 m，4叶片的射频四极杆（RF Quadrupole），谐振频率为324 MHz。馈送到换能器的RF功率引起换能器中的温度升高，这又导致换能器的谐振频率偏移。可以基于反射功率或信号相位信息来维持频率偏移和中频的稳定性。然而，我们已经研究了基于驱动步进电机的RF信号相位的标称频率的恢复。的概念和系统的设置和电子详细描述。测量结果表明，完全恢复的RF信号的相位和步进电机的基础上的标称频率的。此外，测量灵敏度的调谐器相对于它的位置。
For the Front End Test Stand (FETS) linear accelerator project at the Rutherford Appleton Laboratory in the UK, a 4 m, 4 vanes Radio Frequency Quadrupole (RFQ) with a resonant frequency of 324 MHz has been designed. The RF power feeding the RFQ gives rise to the temperature increase in the RFQ, which in turn, results in shifting the resonant frequency of the RFQ. The frequency shift and the stability in the RFQ frequency can be maintained based on the reflected power or signal phase information. We have, however, investigated restoration of the RFQ nominal frequency based on the RF signal phases driving a stepper motor. The concept and the system set-up and electronics are described in detail. Results of the measurements indicating the full restoration of the RFQ nominal frequency based on the RF signal phases and stepper motor are presented. Moreover, measured sensitivity of tuner with respect to its position is given.