Modeling Results of the Quench Behavior of a Nb-Ti Canted-Cosine-Theta Corrector Magnet for LHCShow others and affiliations
2024 (English)In: IEEE transactions on applied superconductivity (Print), ISSN 1051-8223, E-ISSN 1558-2515, Vol. 34, no 5, article id 4001105Article in journal (Refereed) Published
Abstract [en]
A newly designed superconducting magnet of the Canted-Cosine-Theta (CCT) type was developed as a result of a collaboration between Swedish universities (Uppsala and Linneaus) and Swedish industries. This magnet was designed to function as a replacement of the present LHC orbit corrector magnets, which are approaching their end of life due to the radiation load. As a result, the new CCT magnet was developed to be more radiation tolerant and to constitute a one-to-one replacement to the currently installed version, which is a 1 m long 70 mm double aperture dipole magnet. The final magnet, which is currently under construction, will be tested at FREIA laboratory at Uppsala University and generate a magnetic field of 3.3 T and an integrated field of 2.8 Tm at about 85 A. To examine the magnet quench behavior and to identify a suitable quench protection system, the 3D electro-magnetic and thermal behavior of the coil was modeled using the RAT-Raccoon software. Based on the simulation results, a Metrosil varistor was selected to protect the magnet during the test. In this article, we report the results of the numerical analysis. The magnet model is equipped with a spot heater to initialize the quench and the temperature and voltages are monitored during the avalanche effect. The simulated current decay and the hot-spot temperature are analyzed with a focus on the impact of quench-back on the magnet protection.
Place, publisher, year, edition, pages
IEEE, 2024. Vol. 34, no 5, article id 4001105
Keywords [en]
Superconducting magnets, Superconducting cables, Solid modeling, Magnetostatics, Resistance, Electron tubes, Varistors, Accelerator magnet, CCT, Canted-Cosine-Theta, LTS superconductor, quench simulation
National Category
Accelerator Physics and Instrumentation
Research subject
Technology (byts ev till Engineering), Mechanical Engineering
Identifiers
URN: urn:nbn:se:lnu:diva-128509DOI: 10.1109/TASC.2023.3346848ISI: 001174032800011Scopus ID: 2-s2.0-85181566683OAI: oai:DiVA.org:lnu-128509DiVA, id: diva2:1848111
2024-04-022024-04-022024-04-17Bibliographically approved