Test results on 10 T LHC superconducting one metre long dipole models

Abstract

Superconducting twin-aperture dipole model magnets for the CERN future superconducting collider, the Large Hadron Collider (LHC), were built. The authors report on the magnet quench behavior and the field measurements at low and high magnetic induction. They describe the results obtained with 1-m-long models which have been made in industry. To test different design ideas, four magnets were built with a number of technical variants relating to the type of cable and electrical insulation, details in coils, material, shape and assembly method of the collars and the material of the outer shrinking cylinder. Tests performed on two magnets called MTA-JS and MTA-H are discussed. Measurements of the losses in the superconducting cables and the quenching field at various field ramp rates are used to investigate the temperature margin in superfluid helium under steady-state losses.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>