Conveners
FCC-hh HFM: High Field Magnets (i)
- Pierre Vedrine (Université Paris-Saclay (FR))
FCC-hh HFM: High Field Magnets (i)
- Mike Lamont (CERN)
After recalling the updated baseline for LTS option in FCC-hh, with 14 T dipole field and 85 TeV c.o.m. energy, we will outline the main alternative options that are being considered, namely (i) operation at 4.5 K, (ii) hybrid Nb-Ti Nb3Sn magnets, (iii) 20 m long dipoles and (iv) reduced field in the 12 T to 14 T range. We will then outline the advancement in Nb3Sn conductor, magnets designs,...
This presentation introduces the concepts of magnet and circuit protection of the FCC-hh, focusing on the main dipole magnets. For the baseline case of 14 T Nb3Sn magnets, magnet protection is preferably provided by ESC, and eventually quench heaters to cover the low current regime, combined with cold by-pass diodes.
For the case of 14-20 T HTS magnets, a similar protection strategy is...
To realize the dipole field beyond 15 T at 4.2 K, which is required by the proposed high energy accelerators for the next 20~30 years like SPPC or FCC-hh, High Temperature Superconducting (HTS) technology is the only choice due to its highest critical field over 100 T. IHEP has started the R&D of the HTS coils applied in the high field region with IBS and ReBCO from 2018. Significant progress...
Properties of High Temperature Superconductors (HTS) make them unique for both high field and higher temperature (> 4.2 K) applications. While their potential for future accelerators is undeniable, the route to high field magnets requires development and innovation via a targeted and focused research and development programme. Synergy with other on-going HTS projects is important and highly...
The US Magnet Development Program is a collaboration among 4 US laboratories (BNL, FNAL, LBNL, NHMFL) established in 2016, whose general goal is to perform basic R&D towards next generation high-field accelerator magnets. More specifically the strategic priorities are to explore the performance limits of Nb3Sn accelerator magnets, to perform R&D on HTS accelerator magnets, to develop LTS/HTS...
CERN and CEA Paris-Saclay are collaborating in the framework of the HFM (High Field Magnet) project.
One part of the program is to develop $Nb_3Sn$ magnets generating a 14 T operational field, as a baseline for a future high-energy collider. Following some experience acquired in the previous collaborations, CEA has proposed a development plan for block-coil magnets. The goal is to design,...
CIEMAT is contributing to HFM Programme by means of common coil magnets. ISAAC is the first step, a model magnet made using existing RMC coils produced by CERN. Mechanics is based on a low preload concept. As a second step, we have explored the space design of common coil magnets providing 14 T in a 50 mm aperture at 1.9 K. We have found very promising results for hybrid magnets using Nb3Sn...
To explore physics beyond the capabilities of the LHC and its High-Luminosity Upgrade (HL-LHC), particle physicists are aiming for higher-performance accelerators that allow more precise measurements or operate at higher energies and intensities. The last update of the European Strategy for Particle Physics highlighted the urgent need for enhanced research and development on advanced...
In this contribution we present recent results from high-field magnet development for FCC-hh at PSI in the context of the CHART program. R&D activities at PSI include both, LTS (Nb3Sn) and HTS (REBCO) technologies. For LTS, we show test results of two subscale assemblies of stress-managed common-coil magnets, as well as the technical design of a full-scale stress-managed asymmetric common coil...
