First steps of the THOR test facility for accelerator magnets.
Leo E., Avallone G., D'Agostino D., Ferrentino A., Gambardella U., Iannone G., Saggese A., Severino C., Severino F.
Particle accelerators use several magnetic modules arranged on a ring for both bending and focusing particles beam. As a good practice magnetic modules must be individually tested under working conditions. For this purpose, GSI has commissioned the final tests of their superconducting quadrupole modules prior to the installation in the SIS100 accelerator in Darmstadt. In order to answer these needs, at INFN Gruppo Collegato di Salerno the Test in Horizontal (THOR) laboratory has been created. This facility is equipped with a Linde cryogenic refrigerator able to deliver a maximum flow of 15 g/s of supercritical He with an isobaric power of 200 W @ 4.5 K without pre-cooling. Superconducting coils may be biased with a 20 kA Danfysik or a 400 A Cryogenics bipolar power supplies, both equipped with fast early quench detectors. Vacuum and cryogenic tools are used for ensuring the needed insulation vacuum and UHV beam pipe. In the laboratory, we developed instruments to carry out the quality assurance tests (leak tests, insulation tests, and power tests).