Zhang, L. Gao, Z. Liu, L.B. Wang, F.F. Zhang, B. JACoW Publishing Geneva, Switzerland 2226-0366 978-3-95450-194-6 10.18429/JACoW-LINAC2018-MOPO120 English 250-252 MOPO120 linac experiment proton cavity superconducting-cavity Contribution to a conference proceedings 2019 2019-01 https://doi.org/10.18429/JACoW-LINAC2018-MOPO120 http://jacow.org/linac2018/papers/mopo120.pdf Tuner system is the indispensable part of ADS high current proton superconducting linac. It influences the working frequency of superconducting cavity of particle accelerator. To completely understand the working situa-tion of the tuner system and analyses the problems existing in it, experiments of linear part were fully conducted.