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TY - CONF AU - Golm, J. AU - De Gersem, H. AU - Fernandes, M.F. AU - Haider, D.M. AU - Kurian, F. AU - Marsic, N. AU - Müller, W.F.O. AU - Neubert, R. AU - Schmelz, M. AU - Schmidl, F. AU - Schwickert, M. AU - Seidel, P. AU - Sieber, T. AU - Stolz, R. AU - Stöhlker, T. AU - Tan, J. AU - Tympel, V. AU - Welsch, C.P. AU - Zakosarenko, V. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Different Versions of Cryogenic Current Comparators with Magnetic Core for Beam Current Measurements J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - For more than 20 years Cryogenic Current Comparators (CCC) are used to measure the current of charged particle beams with low intensity (nA-range). The device was first established at GSI in Darmstadt and was improved over the past two decades by the cooperation of institutes in Jena, GSI and CERN. The improved versions differ in material parameters and electronics to increase the resolution and in dimensions in order to meet the requirements of the respective application. The device allows non-destructive measurements of the charged particle beam current. The azimuthal magnetic field which is generated by the beam current is detected by low temperature Superconducting Quantum Interference Device (SQUID) current sensors. A complex shaped superconductor cooled down to 4.2 K is used as magnetic shielding and a high permeability core serves as flux concentrator. Three versions of the CCC shall be presented in this work: (1) GSI-Pb-CCC which was running at GSI Darmstadt in a transfer line, (2) CERN-Nb-CCC currently installed in the Antiproton Decelerator at CERN and (3) GSI-Nb-CCC-XD which will be operating in the CRYRING at GSI 2019. Noise, signal and drift measurements were performed in the Cryo-Detector Lab at the University of Jena. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3431 EP - 3434 KW - cryogenics KW - shielding KW - pick-up KW - operation KW - proton DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THYYPLS2 UR - http://jacow.org/ipac2019/papers/thyypls2.pdf ER -