Quench Simulations and Measurements of LHC Superconducting Magnets and Busbars

by F. Sonnemann (CERN)

Thursday 31 May 2001, 14:15 → 15:15 Europe/Zurich

30-7- (CERN)

For the LHC superconducting magnets and busbars a detailed understanding of the quench process requires the combination of thermo-hydraulic and electrodynamic effects. The quench process has been studied by analysing quench data of various prototype busbars and magnets. A numerical program (SPQR - Simulation Program for Quench Research) was developed to evaluate temperature and voltage distributions during a quench as a function of space and time. The model includes the impact of induced eddy currents, heat transfer through an insulation layer into helium and forced quenching by heaters. The simulation outcome and the experimental results will be compared and some of the consequences for the LHC protection system will be presented.