Spoke012超导腔低温调谐器的研制

摘要

调谐器是超导高频系统中的关键设备之一，其功能是调节超导腔的频率。在Spoke012超导高频系统中，我们研发了一个在低温环境下运行的特殊调谐器。该调谐器由操作原理不同的两个部分组成，一个是步进电机驱动的粗调谐部分，另一个是压电陶瓷驱动的细调谐部分。这两个部分串联放置，可达到粗调约200kHz和细调约5Hz的调谐精度。本文报道该低温调谐器的基本参数、设计方案及性能测试结果。%A frequency tuning system ( tuner ) is always needed for a Superconducting RF cavity.For the Spoke012 cavity used in CIADS linac, a specific tuner working at cryogenic temperature was developed at IHEP.It is comprised of two parts operating on different principles, one is a stepper-motor-driven coarse part and the other is a Piezo-actuator-driven fine one.These two parts are placed in series, and may meet the stringent requirements of large range (~200 kHz) and fine resolution ( ~5 Hz) respectively.This paper describes the main parameters, design and test result of the cryogenic tuner.