Speaker
Description
The optimal design of the next generation of accelerator magnets calls
for a high current density in the superconducting coil, which makes
the magnet protection a challenge. Quenches in the high-field magnets
for the High Luminosity LHC Upgrade typically develop within tens of
ms, and the reaction time needs to be comparable, requiring active
firing of heaters or other heat deposition techniques to increase the
quench propagation velocity in the magnet. It is important to have a
very good understanding of the behavior of a magnet during a quench.
Practical scaling laws, and simplified methods, allow quick scans of
design and operation parameters, and swift feedback based on
experimental results once the magnet is in test.
In this paper we describe simplified methods to predict the quench
initiation and development in accelerator magnets using active quench
protection. We use data from the recent Nb3Sn R&D and model magnets
for the High-Luminosity LHC as a benchmark for the method, discussing
expected accuracy and the reasons for deviations.
