Low-Temperature Test Capabilities for the Superconducting Magnets of FAIR

Abstract

Testing the different superconducting magnets for the Facility for Antiproton and Ion Research requires testing capabilities beyond the necessities of dc superconducting magnets: stable power converters with fast cycles, capabilities for measuring the loss, and abilities to measure the field on the ramp for the magnets of the heavy-ion synchrotron SIS100. On the other hand, the Super Fragment Separator (Super-FRS) magnets are of large aperture and large size. The high-current design of the SIS100 main dipole and quadrupole magnets necessitated upgrading the power converter, the current leads, and different measurement systems. Facilities are being built or refurbished for measuring the SIS100 quadrupole units and the Super-FRS magnets. We describe the abilities of these facilities and the status of preparation. The upgrade of the existing facility at GSI has been completed. We present the performance of the main systems and their accuracies based on the measurements made for the SIS100 dipole.