CAS, Inst High Energy Phys, Beijing 100039, Peoples R China
Resonantly coupled RFQ is commonly used as the low-energy accelerating structure for an intense-beam proton linac. It is essential that the field distribution meets the design requirement in order to minimize the beam losses. Based on the RFQ transmission line model, a study on the field tuning was conducted on the cold model RFQ, focusing on the characteristics of the resonantly coupled RFQ structure. A satisfactory result was achieved in the field stabilization, and it also demonstrated the validity of the RFQ tuning code on the platform of LabVIEW.