Cryogenic testing of magnet modules for FAIR ring accelerator: GSI and INFN sign collaboration agreement


The successful cooperation between the GSI Helmholtzzentrum für Schweronenforschung and the Italian National Nuclear Physics Institute (Istituto Nazionale di Fisica Nucleare, INFN) in development and construction of superconducting magnets has existed for many years. On this basis the foundation for further collaboration in this area has now been laid. The INFN will put a series of complex magnet systems, so-called quadrupole modules, for the large FAIR ring accelerator SIS100 through extensive cold testings and thus make an important contribution to the FAIR project. A corresponding collaboration agreement has now been signed.

In preparation for this cooperation, the FAIR subproject team SIS100/SIS18 first compared different options and locations. A good basis for this was also a broader Memorandum of Understanding (MoU) for scientific cooperation between Germany and Italy. The collaboration agreement now signed by GSI/FAIR and INFN is an important part of the technical acceptance of the quadrupole modules to be integrated at Bilfinger Noell in Würzburg.

The high-tech modules for the large FAIR ring accelerator are the result of a complex international production process: first, custom-made superconducting quadrupole units consisting of various types of focusing and correction magnets are produced in Russia and then sent to Germany. There they are brought together with other components procured by GSI and assembled into complete modules for the FAIR ring accelerator.

More than 80 of these integrated quadrupole modules will then be shipped from Würzburg to the National Facility for Superconducting Systems (NAFASSY) in Salerno, Italy, where they will be tested at the final operating temperature of -270 degrees Celsius on a cryogenic test facility specially converted for this process. Main subject of the cold test are the new subsystems formed at Bilfinger Noell as a result of the integration, such as the electric circuits of the correction magnets, the UHV system (ultra-high vacuum) and the thermomechanical characteristics of the cryostat system itself.

The cooperation at the Salerno site, which is well suited for these tasks due to the already existing technical equipment, is to last for several years until all quadrupole modules for the SIS100 ring accelerator have been manufactured, accepted and stepwise set up in the tunnel on the FAIR construction site. (BP)