Energy deposition studies for the High-Luminosity Large Hadron Collider inner triplet magnets

TL;DR

This study models the energy deposition in the HL-LHC inner triplet magnets using advanced simulations, ensuring safety limits are maintained and providing insights into heat loads and radiation doses for future collider operation.

Contribution

Developed a detailed simulation model of HL-LHC inner triplet magnets with new components, enabling accurate energy deposition and radiation dose assessments.

Findings

Peak power density is below quench limit in optimized configuration.

Peak dose in magnet insulators ranges from 20 to 35 MGy for 3000 fb-1.

FLUKA and MARS results show very good agreement.

Abstract

A detailed model of the High Luminosity LHC inner triplet region with new large-aperture Nb3Sn magnets, field maps, corrector packages, and segmented tungsten inner absorbers was built and implemented into the FLUKA and MARS15 codes. In the optimized configuration, the peak power density averaged over the magnet inner cable width is safely below the quench limit. For the integrated luminosity of 3000 fb-1, the peak dose in the innermost magnet insulator ranges from 20 to 35 MGy. Dynamic heat loads to the triplet magnet cold mass are calculated to evaluate the cryogenic capability. In general, FLUKA and MARS results are in a very good agreement.