As part of the design and machining of the RFQ accelerator in the Compact Pulsed Hadron Source （CPHS） project at Tsinghua University, the design process of the undercuts and dipole stabilizer rods is presented in th...As part of the design and machining of the RFQ accelerator in the Compact Pulsed Hadron Source （CPHS） project at Tsinghua University, the design process of the undercuts and dipole stabilizer rods is presented in this paper. In particular, the relationship between the inter-vane voltage slope and the local frequency of the undercut section is described quantitatively. With the identification of modes existing in the cavity, the specific parameters are optimized by the SUPERFISH and MAFIA codes. In addition, the water-cooling requirement of the dipole stabilizer rods is briefly discussed.展开更多
北京大学自主研制了基于射频四极(Radio Frequency Quadrupole,RFQ)强流氘束加速器。为满足该加速器稳定运行的要求,设计了一套低电平控制系统,系统主要包含自动增益控制(Automatic Gain Control,AGC)和自动频率控制(Automatic Frequenc...北京大学自主研制了基于射频四极(Radio Frequency Quadrupole,RFQ)强流氘束加速器。为满足该加速器稳定运行的要求,设计了一套低电平控制系统,系统主要包含自动增益控制(Automatic Gain Control,AGC)和自动频率控制(Automatic Frequency Control,AFC)两种方式,可实现对腔体频率、进腔功率的自动控制和手动控制。为保证安全、稳定运行,对SWR(Standing Wave Ratio)、限位信号进行监测,通过RS232协议和Lab VIEW界面实现HMI(Human Machine Interface),亦可实现与PLC(Programmable Logic Controller)的无缝对接。连续闭环运行表明,控制系统对场幅度和相位的控制精度能够达到±1%和±1°之内,证明该低电平控制系统达到了RFQ加速器对各路功率和腔体频率稳定控制的要求。展开更多
基金Supported by the '985 Project' of the Ministry of Education of China
文摘As part of the design and machining of the RFQ accelerator in the Compact Pulsed Hadron Source （CPHS） project at Tsinghua University, the design process of the undercuts and dipole stabilizer rods is presented in this paper. In particular, the relationship between the inter-vane voltage slope and the local frequency of the undercut section is described quantitatively. With the identification of modes existing in the cavity, the specific parameters are optimized by the SUPERFISH and MAFIA codes. In addition, the water-cooling requirement of the dipole stabilizer rods is briefly discussed.
文摘北京大学自主研制了基于射频四极(Radio Frequency Quadrupole,RFQ)强流氘束加速器。为满足该加速器稳定运行的要求,设计了一套低电平控制系统,系统主要包含自动增益控制(Automatic Gain Control,AGC)和自动频率控制(Automatic Frequency Control,AFC)两种方式,可实现对腔体频率、进腔功率的自动控制和手动控制。为保证安全、稳定运行,对SWR(Standing Wave Ratio)、限位信号进行监测,通过RS232协议和Lab VIEW界面实现HMI(Human Machine Interface),亦可实现与PLC(Programmable Logic Controller)的无缝对接。连续闭环运行表明,控制系统对场幅度和相位的控制精度能够达到±1%和±1°之内,证明该低电平控制系统达到了RFQ加速器对各路功率和腔体频率稳定控制的要求。
