CBM Dipole Magnet

Superconducting dipole magnet for the Compressed Baryonic Matter (CBM) experiment at FAIR. The magnet houses the Silicon Tracking System (STS) and provides a magnetic field integral of 1 Tm which is needed to obtain a momentum resolution of ?p/p < 2% for track reconstruction at FAIR beam energies. The magnet gap has a height of 147 cm and a width of 330 cm in order to accommodate the STS detector. The magnet is of the H-type with a warm iron yoke/pole and cylindrical superconducting coils in two separate casings like the SAMURAI magnet at RIKEN. The potted coil uses Nb-Ti wire with a large Cu/SC ratio. The coil case made of stainless steel contains liquid helium for cooling. The vertical force in the coils is about 300 tons. The cold mass is suspended from the room-temperature vacuum vessel by suspension links. Cylindrical support struts compensate for the vertical forces. The energy stored in the magnet is about 5 MJ. The magnet will be self-protecting. However, in order to limit the temperature rise to 120 K in case of a quench, the energy will be dumped in an external resistor.

Engineering Design of the magnet and its cryostat incl. all tools, support stands and lifting units. Engineering design of the branch box, CBM feed box and cryogenic transfer line. Production of 1:1 mockup. Production and delivery of the magnet, consisting of yoke, cold mass, cryostat and cold leads. Production of branch box incl. cryogenic transfer line and further supports. Production of other necessary components as well as FAT testing and SAT and assembly support. The complete scope is shown within the detailed specification.

Bekanntmachungs-ID: CXP4YY4HBYS