Q factor is a main parameter of SFC RF cavity, it is related not only to RF power loss, but also high or low output power in RF generator and it directly affects RF generator. SFC accelerator vacuum-chamber has been i...Q factor is a main parameter of SFC RF cavity, it is related not only to RF power loss, but also high or low output power in RF generator and it directly affects RF generator. SFC accelerator vacuum-chamber has been improved, we have measured resonance frequency, situation of short-plate, reflect impedance and phase and calculated Q factor of SFC RF cavity. We used the method of capacitance coupling and frequency band to calculated Q factor, Q=Fo/(Fh-Fl), Fo, Fh, Fl are resonate frequency, upper frequency, down frequency of resonance point. Every point resonate frequency is got by changing Ld, Co, Cp. Here Ld is position of short-plate, Co is coupling capacity, Cp is compensating capacity. Test principle diagram is as follows (shown in Fig.1).展开更多
文摘Q factor is a main parameter of SFC RF cavity, it is related not only to RF power loss, but also high or low output power in RF generator and it directly affects RF generator. SFC accelerator vacuum-chamber has been improved, we have measured resonance frequency, situation of short-plate, reflect impedance and phase and calculated Q factor of SFC RF cavity. We used the method of capacitance coupling and frequency band to calculated Q factor, Q=Fo/(Fh-Fl), Fo, Fh, Fl are resonate frequency, upper frequency, down frequency of resonance point. Every point resonate frequency is got by changing Ld, Co, Cp. Here Ld is position of short-plate, Co is coupling capacity, Cp is compensating capacity. Test principle diagram is as follows (shown in Fig.1).
