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TY - CONF AU - Zhang, X.Y. AU - Hao, X.R. AU - Li, D.B. AU - Li, Z.Q. AU - Lin, H.Y. AU - Ma, Q. AU - Mi, Z.H. AU - Wang, Q.Y. AU - Zhang, P. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Mechanical Design and Horizontal Tests of a Dressed 166.6 MHz Quarter-wave β=1 SRF Cavity System 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 - A 166.6 MHz quarter-wave β=1 superconducting proof-of-principle cavity has been designed and recently been dressed with a helium jacket, fundamental power coupler and tuner. The cavity was subsequently installed in a modified cryomodule and tested in a horizontal manner at both 4.2 K and 2 K. The helium jacket was successfully developed with a focus on minimizing frequency shift due to helium pressure fluctuation while retaining a reasonable tuning range. The Lorentz force detuning (LFD) and microphonics were also optimized during the design. The df/dp and LFD coefficient were measured to be -3.1 Hz/mbar and -0.8 Hz/(MV/m)². These are in good agreement with simulations. Future work is mainly to reduce the stiffness of the cavity and further suppress the vibration mode of the inner conductor. PB - JACoW Publishing CP - Geneva, Switzerland SP - 408 EP - 412 KW - cavity KW - simulation KW - cryomodule KW - superconducting-cavity KW - SRF DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-TUP010 UR - http://jacow.org/srf2019/papers/tup010.pdf ER -