Radiation effects in a muon collider ring and dipole magnet protection

TL;DR

This paper analyzes radiation effects in a muon collider storage ring's dipole magnets, comparing two designs and proposing tungsten masks to mitigate heat and radiation challenges for superconducting magnets.

Contribution

It presents a comparative analysis of radiation effects in two dipole magnet designs for a muon collider and discusses mitigation strategies using tungsten masks.

Findings

Tungsten masks effectively reduce heat deposition in magnet coils.

Design differences significantly impact radiation distribution.

Mitigation strategies are essential for superconducting magnet protection.

Abstract

The requirements and operating conditions for a Muon Collider Storage Ring (MCSR) pose significant challenges to superconducting magnets. The dipole magnets should provide a high magnetic field to reduce the ring circumference and thus maximize the number of muon collisions during their lifetime. One third of the beam energy is continuously deposited along the lattice by the decay electrons at the rate of 0.5 kW/m for a 1.5-TeV c.o.m. and a luminosity of 1034 cm-2s-1. Unlike dipoles in proton machines, the MCSR dipoles should allow this dynamic heat load to escape the magnet helium volume in the horizontal plane, predominantly towards the ring center. This paper presents the analysis and comparison of radiation effects in MCSR based on two dipole magnets designs. Tungsten masks in the interconnect regions are used in both cases to mitigate the unprecedented dynamic heat deposition and radiation in the magnet coils.