TY - CONF AU - Dutheil, Y. AU - Alden, S.E. AU - Alemany-Fernández, R. AU - Apyan, A. AU - Bartosik, H. AU - Bessonov, E.G. AU - Biancacci, N. AU - Bosco, A. AU - Bruce, R. AU - Castelli, F. AU - Curatolo, C. AU - Czodrowski, P. AU - Fedosseev, V. AU - Gibson, S.M. AU - Goddard, B. AU - Hirlaender, S. AU - Jowett, J.M. AU - Kersevan, R. AU - Kowalska, M. AU - Kroeger, K. AU - Lamont, M. AU - Manglunki, D. AU - Martens, A. AU - Molson, J. AU - Nevay, L.J. AU - Petrenko, A.V. AU - Petrillo, V. AU - Sapinski, M. AU - Schaumann, M. AU - Serafini, L. AU - Stöhlker, T. AU - Weber, G. AU - Wu, Y.K. AU - Zimmermann, F. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Gamma Factory at CERN: Design of a Proof-of-Principle Experiment J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The Gamma Factory (GF) initiative proposes to create novel research tools at CERN by producing, accelerating and storing highly relativistic partially stripped ion beams in the LHC rings and by exciting their atomic degrees of freedom by lasers, to produce high-energy photon beams. Their intensity would be several orders of magnitude higher than those of the presently operating light sources in the particularly interesting gamma-ray energy domain reaching up to 400 MeV. In this energy domain, the high-intensity photon beams can be used to produce secondary beams of polarized electrons, polarized positrons, polarized muons, neutrinos, neutrons and radioactive ions. Over the years 2017-2018 we have demonstrated that these partially stripped ion beams can be successfully produced, accelerated and stored in the CERN accelerator complex, including the LHC. The next step of the project is to build a proof of principle experiment in the SPS to validate the principal GF concepts. This contribution will present the initial conceptual design of this experiment along with its main challenge - the demonstration of the fast cooling method of partially stripped ion beams. PB - JACoW Publishing CP - Geneva, Switzerland SP - 685 EP - 688 KW - photon KW - laser KW - experiment KW - electron KW - cavity DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPRB052 UR - http://jacow.org/ipac2019/papers/moprb052.pdf ER - TY - CONF AU - Sieber, T. AU - De Gersem, H. AU - Golm, J. AU - Haider, D.M. AU - Marsic, N. AU - Müller, W.F.O. AU - Reeg, H. AU - Schmelz, M. AU - Schmidl, F. AU - Schwickert, M. AU - Seidel, P. AU - Stolz, R. AU - Stöhlker, T. AU - Tan, J. AU - Tranquille, G. AU - Tympel, V. AU - Zakosarenko, V. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Next Generation Cryogenic Current Comparator (CCC) for nA Intensity Measurement J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - A Cryogenic Current Comparator (CCC) is an extremely sensitive DC-Beam Transformer based on superconducting SQUID technology. Recently, a CCC without a toroidal core and with an axially oriented magnetic shielding has been developed at the Institute of Photonic Technologies (IPHT) Jena/Germany. It represents a compact and lightweight alternative to the ’classical’ CCC, which was originally developed at PTB Braunschweig and is successfully in operation in accelerators at GSI and CERN. Excellent low-frequency noise performance was demonstrated with a prototype of this new CCC-type. Current measurements and further tests are ongoing, first results are presented together with simulation calculations for the magnetic shielding. The construction from lead as well as simplified manufacturing results in drastically reduced costs compared to formerly used Nb-CCCs. Reduced weight also puts less constraints on the cryostat. Based on highly sensitive SQUIDs, the new prototype device shows a current sensitivity of about 6 pA/Hz1/2 in the white noise region. The measured and calculated shielding factor is ~135 dB. These values, together with a significant cost reduction - resulting also from a compact cryostat design - opens up the way for widespread use of CCCs in modern accelerator facilities. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2510 EP - 2513 KW - shielding KW - cryogenics KW - pick-up KW - coupling KW - detector DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPGW020 UR - http://jacow.org/ipac2019/papers/wepgw020.pdf ER - 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 -