Modelling of helium-mediated quench propagation in the LHC prototype test string-1

✍ Scribed by M. Chorowski; P. Grzegory; L. Serio; R. van Weelderen

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 387 KB
• Volume: 40
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(01)00016-9

✦ Synopsis

The Large Hadron Collider (LHC) prototype test string-1, hereafter referred to as the string, is composed of three 10-m long prototype dipole magnets and one 6-m long prototype quadrupole magnet. The magnets are immersed in a pressurized static bath of super¯uid helium that is maintained at a pressure of about 1 bar and at a temperature of about 1.9 K. This helium bath constitutes one single hydraulic unit, extending along 42.5 m of the string length. We have measured the triggering of quenches of the string magnets due to the quenching of a single dipole magnet located at the string's extremity, i.e., ``quench propagation''. Previously reported measurements enabled to establish that in this con®guration the quench propagation is mediated by the helium and not by the inter-magnet bus bar connections [L.