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TY - CONF AU - Conway, Z.A. AU - Barcikowski, A. AU - Cherry, G.L. AU - Fischer, R.L. AU - Guilfoyle, B.M. AU - Hopper, C.S. AU - Kedzie, M. AU - Kelly, M.P. AU - Kim, S.H. AU - Lebedev, V.A. AU - Lunin, A. AU - MacDonald, S.W.T. AU - Ostroumov, P.N. AU - Reid, T. ED - Yamazaki, Yoshishige ED - Facco, Alberto ED - McCausey, Amy ED - Schaa, Volker RW TI - Progress Towards a 2.0 K Half-Wave Resonator Cryomodule for Fermilab's PIP-II Project J2 - Proc. of LINAC2016, East Lansing, MI, USA, 25-30 September 2016 C1 - East Lansing, MI, USA T2 - Linear Accelerator Conference T3 - 28 LA - english AB - In support of Fermilab's Proton Improvement Plan-II project Argonne National Laboratory is constructing a superconducting half-wave resonator cryomodule. This cryomodule is designed to operate at 2.0 K, a first for low-velocity ion accelerators, and will accelerate ≥1 mA proton/H⁻ beams from 2.1 to 10.3 MeV. Since 2014 the construction of 9 162.5 MHz b = 0.112 superconducting half-wave resonators, the vacuum vessel and the majority of the cryomodule subsystems have been finished. Here we will update on the status of this work and report on preliminary cavity test results. This will include cavity performance measurements where we found residual resistances of < 3 nanoOhms at low fields and peak voltage gains of 5.9 MV, which corresponds to peak surface fields of 134 MV/m and 144 mT electric and magnetic respectively. PB - JACoW CP - Geneva, Switzerland SP - 906 EP - 909 KW - cryomodule KW - vacuum KW - cavity KW - linac KW - SRF DA - 2017/05 PY - 2017 SN - 978-3-95450-169-4 DO - 10.18429/JACoW-LINAC2016-THPLR027 UR - http://jacow.org/linac2016/papers/thplr027.pdf ER -