KEK effort for high field magnets

TL;DR

KEK is advancing high field magnet technology by developing superconductors like RHQNb3Al, studying stress/strain effects, and exploring HTS and A15 materials for future 15 T+ magnets, with ongoing R&D and collaborations.

Contribution

This paper reports KEK's recent efforts in superconductor development, stress/strain sensitivity studies, and collaborative research for high field magnet realization.

Findings

Development of 13 T sub-scale magnet with RHQNb3Al

Initiation of stress/strain sensitivity research for HTS and A15 superconductors

Collaborative studies with J-PARC and Tohoku University facilities

Abstract

KEK has emphasized efforts to develop the RHQNb3Al superconductor and a sub-scale magnet reaching 13 T towards the HL-LHC upgrade in last years. In addition, relevant R&D regarding radiation resistance has been carried out. For higher field magnets beyond 15 T, HTS in combination with A15 superconductors should be one of baseline materials. However, all these superconductors are very sensitive to stress and strain and thorough understanding of behaviour is truly desired for realization of high field magnets. KEK has launched a new research subject on stress/strain sensitivity of HTS and A15 superconductors in collaboration with the neutron diffraction facility at J-PARC and High Field Laboratory in Tohoku University. Present activity for high field magnets at KEK is reported.