Tang, R. Du, C.T. Guan, X. Lei, Y. Li, J. Ma, P.F. Man, K.D. Tang, C.-X. Wang, X.W. Xing, Q.Z. Ye, W.B. Zhang, H.Y. Zheng, S.X. JACoW Publishing Geneva, Switzerland 2226-0366 978-3-95450-194-6 10.18429/JACoW-LINAC2018-THPO035 English 759-762 THPO035 DTL proton simulation linac cavity Contribution to a conference proceedings 2019 2019-01 https://doi.org/10.18429/JACoW-LINAC2018-THPO035 http://jacow.org/linac2018/papers/thpo035.pdf An interdigital H-mode drift tube linac (IH-DTL), which accelerates proton beam from 3 MeV to 7 MeV has been designed and assembled at Tsinghua University. There are 8 plungers in the 1 m tank and one co-axial coupler is used to feed the power. The frequency is tuned to 325 MHz. The field distribution is measured by the bead perturbation method. Finally, the gap voltage error has been tuned to be smaller than ±3.0%, which satisfies the design requirement. The Q factor of the tank is 7000 while the power dissipation is 244 kW. Details of the low power test is presented.