Analyzing the efects of post couplers in DTL tuning by the equivalent circuit model

• 作 者: 贾晓宇 郑曙昕
• 机 构: Key Laboratory of Particle & Radiation Imaging (TsinghuaUniversity), Ministry of Education,Departmen
• 出 处: Chinese Physics C
• 发表日期: 2013年12期
• 关键词: symmetrical asymmetrical tuning stabilization perturbation rotating resonant ada

Stabilization of the accelerating field in Drift Tube Linac(DTL) is obtained by inserting Post Cou- plers(PCs). On the basis of the equivalent circuit model for the DTL with and without asymmetrical PCs, stabiliza- tion is deduced quantitatively: we let δω/ω0 be the relative frequency error, then we discover that the sensitivity of field to perturbation is proportional to δω/ω0 without PCs and to δω/ω0 with PCs. Then we adapt the circuit model of symmetrical PCs for the case of asymmetrical PCs. The circuit model shows how the slope of field distri- bution is changed by rotating the asymmetrical PCs and illustrates that the asymmetrical PCs have the same efect as the symmetrical ones in stabilization.

Stabilization of the accelerating field in Drift Tube Linac (DTL) is obtained by inserting Post Coupons (PCs). On the basis of the equivalent circuit model for the DTL with and without asymmetrical PCs, stabiliza- tion is deduced quantitatively: we let δω / ω0 be the relative frequency error, then we discover that the sensitivity of field to perturbation is proportional to δω / ω0 without PCs and to δω / ω0 with PCs. Then we adapt the circuit model of symmetrical PCs for the case of asymmetrical PCs The circuit model shows how the slope of field distri- bution is changed by rotating the asymmetrical PCs and illustrate that the asymmetrical PCs have the same efect as the symmetrical ones in stabilization.