CERN Accelerating science

Article
Title	Chapter 31: High Field Accelerator Magnets for Next Generation Colliders – Motivation, Goals, Challenges and R&D; Drivers
Author(s)	Bottura, L (CERN)
Publication	2024
Number of pages	27
In:	Adv. Ser. Direct. High Energy Phys. 31 (2024) 615-641
In:	The High Luminosity Large Hadron Collider, pp.615-641
DOI	10.1142/9789811278952_0031
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC
Project	CERN HL-LHC
Abstract	The Hadron Collider (LHC) at CERN can be regarded as the ultimate collider built with Nb3 Ti magnets. Its main dipoles have reached a field of approximately 8 T, which is very likely close to the highest practical field for this superconductor in accelerators. The next major step is the High Luminosity upgrade of the LHC at CERN, which among the many upgrades of the accelerator, calls for a few tens of Nb3Sn dipole and quadrupole magnets, operated at 1.9 K and at conductor peak fields up to about 12 T. HL-LHC magnets are in the production phase, marking an historical milestone in accelerator technology and the culmination of 20 years of worldwide R&D.; Here we describe the rationale for high field accelerator magnet R&D; beyond HL-LHC, consisting of two complementary axes: (i) development of an ultimate Nb3Sn technology, increasing the field reach and achieving maturity and robustness level required for deployment on a large scale and (ii) demonstrating suitability of high-temperature superconductors for accelerator magnet applications. We start with a review of the state-of-the-art, review the main goals, and identify the drivers for an R&D; program responding to the declared priorities of the European Strategy Upgrade. This chapter is intended as the starting point in the formation of a structured High Field Accelerator Magnet R&D; Program.
Copyright/License	© 2024 The Editor(s) (License: CC-BY-NC-4.0)

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