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

JIA Xiao-Yu; ZHENG Shu-Xin

doi:10.1088/1674-1137/37/12/127005

Chinese Physics C> 2013, Vol. 37> Issue(12) : 127005 DOI: 10.1088/1674-1137/37/12/127005

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

JIA Xiao-Yu ,
ZHENG Shu-Xin ^,

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Abstract：
Stabilization of the accelerating field in Drift Tube Linac(DTL) is obtained by inserting Post Couplers(PCs). On the basis of the equivalent circuit model for the DTL with and without asymmetrical PCs, stabilization 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 distribution is changed by rotating the asymmetrical PCs and illustrates that the asymmetrical PCs have the same effect as the symmetrical ones in stabilization.

References

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JIA Xiao-Yu and ZHENG Shu-Xin. Analyzing the effects of post couplers in DTL tuning by the equivalent circuit model[J]. Chinese Physics C, 2013, 37(12): 127005. doi: 10.1088/1674-1137/37/12/127005

JIA Xiao-Yu and ZHENG Shu-Xin. Analyzing the effects of post couplers in DTL tuning by the equivalent circuit model[J]. Chinese Physics C, 2013, 37(12): 127005. doi: 10.1088/1674-1137/37/12/127005 shu

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Received: 2013-03-28
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: ZHENG Shu-Xin,

Received Date: 2013-03-28

Accepted Date: 1900-01-01

Available Online: 2013-12-05

Abstract: Stabilization of the accelerating field in Drift Tube Linac(DTL) is obtained by inserting Post Couplers(PCs). On the basis of the equivalent circuit model for the DTL with and without asymmetrical PCs, stabilization 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 distribution is changed by rotating the asymmetrical PCs and illustrates that the asymmetrical PCs have the same effect as the symmetrical ones in stabilization.

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

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