Quench Protection Study of the Updated MQXF for the LHC Luminosity Upgrade (HiLumi LHC)
Research output: Contribution to journal › Article › Scientific › peer-review
|Journal||IEEE Transactions on Applied Superconductivity|
|Publication status||Published - 1 Jun 2016|
|Publication type||A1 Journal article-refereed|
In 2023, the LHC luminosity will be increased, aiming at reaching 3000 fb-1 integrated over ten years. To obtain this target, new Nb3Sn low-β quadrupoles (MQXF) have been designed for the interaction regions. These magnets present a very large aperture (150 mm, to be compared with the 70 mm of the present NbTi quadrupoles) and a very large stored energy density (120 MJ/m3). For these reasons, quench protection is one of the most challenging aspects of the design of these magnets. In fact, protection studies of a previous design showed that the simulated hot spot temperature was very close to the maximum allowed limit of 350 K; this challenge motivated improvements in the current discharge modeling, taking into account the so-called dynamic effects on the apparent magnet inductance. Moreover, quench heaters design has been studied to be going into more details. In this paper, a protection study of the updated MQXF is presented, benefitting from the experience gained by studying the previous design. A study of the voltages between turns in the magnet is also presented during both normal operation and most important failure scenarios.
ASJC Scopus subject areas
- Niobium compounds, quench protection, superconducting accelerators