Application of the transfer matrix for tuning the CSNS-DTL

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LI A-Hong, YIN Xue-Jun, FU Shi-Nian and SUN Zhi-Rui. Application of the transfer matrix for tuning the CSNS-DTL[J]. Chinese Physics C, 2011, 35(10): 959-963. doi: 10.1088/1674-1137/35/10/014
LI A-Hong, YIN Xue-Jun, FU Shi-Nian and SUN Zhi-Rui. Application of the transfer matrix for tuning the CSNS-DTL[J]. Chinese Physics C, 2011, 35(10): 959-963.  doi: 10.1088/1674-1137/35/10/014 shu
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Received: 2010-12-20
Revised: 1900-01-01
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Application of the transfer matrix for tuning the CSNS-DTL

Abstract: In the construction of a drift tube LINAC (DTL), many factors caused during the fabrication and assembly of the structure cells cause the electric field distribution not as the same as the design curve. To solve this problem, the traditional way is to solve the equation of Slater's perturbation theorem to obtain the electrical field variation due to local frequency shift. However, that is very difficult under complicated conditions. Since the field perturbation equation is similar to the particle's transverse motion equation, which can be simply solved by using the transfer matrix method, we thus propose to apply a transfer matrix method in tuning the DTL. We demonstrate the availability and advantages of this method with 3D microwave code simulation and the LabVIEW calculation program. After two iterations, the initial error of the electric field of 19.5% has been improved greatly down to 1.3%- -4.5%. This indicates that the transfer matrix method is very useful and convenient for the simplification of tuning procedures.

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