The High Luminosity LHC interaction region magnets towards series production

Abstract

The High Luminosity Large Hadron Collider (HL-LHC) is the new flagship project of CERN. First endorsed in 2013 and approved in 2016, HL-LHC is an upgrade of the accelerator aiming to increase by a factor of ten the statistics of the LHC collisions at the horizon of 2035-2040. HL-LHC relies on cutting edge technologies: among them, large aperture superconducting magnets will replace the present hardware to allow a smaller beam size in two interaction points (IPs). The project involves the construction of about 150 magnets of six different types: the quadrupole triplet, two main dipoles and three orbit correctors. The triplet, manufactured at CERN and in the USA, will consist of 30 magnets based on Nb 3 Sn technology, with an Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

Progress in the Development of the Nb3Sn MQXFB Quadrupole for the HiLumi Upgrade of the LHC

“…The quench corrent at 4.5 K is 1 kA lower, correponding to 70 % of the short sample limit at both temperature levels. There are not traces of reverse or erratic behaviour as is MQXFS3 and MQXFAP1b [2]. Magnet disassembly is on-going to underatnd the origin of the performance limitation.…”

“…ITH the High Luminosity Upgrade of the Large Hadron Collider (HL-LHC), CERN is planning to upgrade the interaction region in order to increase the peak luminosity by a factor 2 and the integrated luminosity by a factor 10 [1]. Since the beam size in the Interaction Point (IP) is inverse proportional to the aperture of the first magnets after the experiments, the HL-LHC project requires the replacement of the Interaction Region (IR) magnets with larger aperture ones [2]. An essential ingredient of the IR magnets upgrade is the triplet, that is the sequence of the first three quadrupoles (Q1, Q2a, Q2b and Q3) in front of the experiments.…”

Power Test of the First Two HL-LHC Insertion Quadrupole Magnets Built at CERN

“…A S part of the HL-LHC project at CERN, the Nb-Ti inner triplet quadrupole magnets near the ATLAS and CMS interaction points will be replaced with large aperture Nb 3 Sn quadrupole magnets, named MQXF [1], [2]. These magnets are developed, manufactured, and tested in a collaboration between CERN and the US HL-LHC Accelerator Upgrade Project (AUP).…”

Final design of the cryostat for the high luminosity LHC magnets

“…The high luminosity LHC (HL-LHC) is an on-going project aiming to upgrade the LHC accelerator and extend its discovery potential [1]. The upgrade will rely on new superconducting magnets to be installed on both sides of the ATLAS and CMS experiments [2]. Enlarged magnet aperture and high peak field are achieved by switching from Nb-Ti to Nb3Sn superconductor technology in the three quadrupoles closest to the interaction points (Q1-Q2-Q3, also known as triplet).…”