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Superconducting SIS100 Prototype Magnets Test Results and Final Design Issues

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8 Author(s)
Egbert Fischer ; GSI Helmholtzzentrum für Schwerionenforschung mbH ; Pierre Schnizer ; Pavel Akishin ; Roman Kurnyshov
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The SIS 100 synchrotron is based on Nuclotron type superconducting magnets. These are operated with 4 T/s up to a maximum field of 2 Tesla (dipoles). Based on the experience of the R&D period three full scale dipoles as well as one quadrupole were built. The first dipole was tested intensively this year. We present the operation performance of the first magnet next to the AC losses and apply a concise description of the magnetic field within the complete elliptical beam pipe. We analyse the static and dynamic field quality of the dipoles and compare them to the calculated ones. These test results allow us describing the parameters of the final dipole design for the machine and the field distortions the vacuum chamber creates along with investigations to reduce these artefacts. Based on our preliminary theoretical R&D and the recent measurement results we conclude on the expected operation parameters of an optimized curved dipole with a high current single layer coil and we describe the actual work topics for this magnet.

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IEEE Transactions on Applied Superconductivity  (Volume:20 ,  Issue: 3 )