Abstract
Type-II superconductors, like the ${\mathrm{Nb}}_{3}\mathrm{Sn}$ used in the new HL--LHC quadrupole triplet and 11 T dipoles or FCC dipoles, are known to show an unstable behavior during magnetic-field ramps. This paper presents an analysis of the possible effects on the beam dynamics of this behavior of the magnets, with a focus on emittance blow-up.
Highlights
The challenge of reducing the beam size at the interaction points has a very strong impact on the aperture requirements of the final focus system of colliders
The effect of the flux jumps on the field itself has been measured on the MBHSP109 prototype of the 11 T dipole [8]
The effect of the flux jumps in the HL–LHC triplet quadrupoles and 11 T dipoles has been studied
Summary
The challenge of reducing the beam size at the interaction points has a very strong impact on the aperture requirements of the final focus system of colliders. To keep the required magnetic gradient seen by the beam, this new quadrupole package is longer than the one in the LHC and uses Nb3Sn superconductor technology, which allows to increase the magnetic gradient by about 50% [4]. In this region, small spots of normal-conducting material start to form and the supercurrents circle around them forming vortexes that induce a quantized unit of magnetic flux. Small spots of normal-conducting material start to form and the supercurrents circle around them forming vortexes that induce a quantized unit of magnetic flux VI a similar analysis is performed for the FCC-hh main dipoles
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
