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TY - CONF AU - Kamigaito, O. AU - Ozeki, K. AU - Sakamoto, N. AU - Suda, K. AU - Yamada, K. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Measurement of Mechanical Vibration of SRILAC Cavities J2 - Proc. of SRF2019, Dresden, Germany, 30 June-05 July 2019 CY - Dresden, Germany T2 - International Conference on RF Superconductivity T3 - 19 LA - english AB - Mechanical vibration of quarter-wavelength resonators of SRILAC, the superconducting booster of the RIKEN heavy-ion linac, was measured during a vertical cold test. The measurements were performed for fully assembled cavities as well as for bare niobium cavities without the titanium jacket. In the procedure, the instantaneous resonant frequencies were measured for 10 seconds at a time interval of 1 ms and were recorded as a time series. The frequencies were analyzed by means of conventional signal analysis. The power spectrum was deduced from the autocorrelation function calculated with the fluctuation of resonant frequencies. Although the vibration amplitudes were smaller in the cavities assembled with the titanium jacket, we could not find a clear reason for this. PB - JACoW Publishing CP - Geneva, Switzerland SP - 513 EP - 517 KW - cavity KW - niobium KW - linac KW - ECR KW - cryomodule DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-TUP042 UR - http://jacow.org/srf2019/papers/tup042.pdf ER -