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

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

    Corresponding author: ZHENG Shu-Xin,

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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