The CSNS / RCS ferrite loading cavity system prototype organized the CSNS / RCS ferrite loading cavity system prototype appraisal meeting at the Institute of High Energy Physics of the Chinese Academy of Sciences through the identification of the Spallation Neutron Source (CSNS) Engineering Manager. An appraisal group consisting of 12 experts from the Chinese Academy of Atomic Energy Sciences, the Institute of Modern Physics of the Chinese Academy of Sciences, Shanghai Yingwu Institute and High Energy Institute respectively listened to the development summary report made by the manufacturer and the research group, and the test report of the test group And conducted on-site inspection, testing and answering questions. After careful discussion, the appraisal team agreed to pass the appraisal. The ferrite loading cavity system is one of the important pre-research projects of CSNS, including the development of the ferrite loading coaxial resonance cavity prototype and the bias current source prototype. The ferrite loading cavity is a key device for generating RF acceleration voltage. As the beam energy increases, the resonance frequency of the cavity must follow the frequency of the acceleration voltage. The change is to change the bias magnetic field strength of the ferrite in the cavity by adjusting the bias current of the cavity. The bias current is provided by the bias current source to meet the dynamic tuning requirements of the ferrite loading cavity. The CSNS / RCS ferrite-loaded coaxial resonant cavity is a double-gap coaxial acceleration structure. The cavity structure is complex, and the design and processing are difficult. The successful independent research and development of the ferrite loading cavity prototype shows that the physical design of the cavity is correct, the overall structural design is reasonable, and key process technologies such as the design, processing and assembly of key components are successful, which can ensure the performance of the cavity. The bias current source adopts the circuit structure of four IGBT power modules in parallel and the multiple PWM control method, which increases the equivalent switching frequency of the power supply, which is beneficial to reduce the output ripple and enhance the dynamic response capability of the power supply. Judging from the results of the current system joint tuning experiment, the design scheme of the switch-type dynamic high-current DC power supply can meet the dynamic tuning needs of the cavity.
Hospital Chair,Hospital Infusion Chair,Patient Infusion Chair,Hospital Nursing Chair
Jiangmen Jia Mei Medical Products Co.,Ltd. , https://www.jiamei-medical.com