5 research outputs found
Progress in the Development of the 1 m Model of the 70 mm Aperture Quadrupole for the LHC Low- Insertions
Within the LHC magnet development program Oxford Instruments has built a one metre model of the 70Â mm aperture low-beta quadrupole. The magnet features a four layer coil wound from two 8.2 mm wide graded NbTi cables, and is designed for 250Â T/m at 1.9Â K. The magnet has previously been tested between 4.5Â K and 2.3Â K. In this paper we review the magnet rebuild and the subsequent tests. Results on magnet training at 4.3Â K and 1.9Â K are presented along with the results related to quench protection studies.
Quench Performance and Field Quality Measurements of the First LHC low- Quadrupole Model
As part of the LHC magnet development program, CERN in collaboration with Oxford Instruments has designed, built and tested a one metre model of a 70 mm aperture low-beta quadrupole. The magnet features a four layer coil, and is designed for 250 T/m at 1.9 K. We review the results of the magnet training and quench propagation studies performed at 4.3 K and 1.9 K, and report on the magnetic field measurements
Performance of the 1-meter models of the 70 mm aperture quadrupole for the LHC low-beta insertions
Following the successful testing of the first 1-metre model of the 70 mm aperture quadrupole for the LHC low-beta insertions, two further 1-metre magnets have been built. All magnets feature a four-layer coil wound from two 8.2 mm wide graded NbTi cables and a four-way split yoke supporting structure. In this paper we review the training history of the three magnets performed at 4.3 K and 1.9 K in several tests. All magnets surpassed the operating gradient required for the LHC, with the third magnet reaching 260 T/m, its short-sample gradient at 1.9 K. The peak temperatures in the superconductor at various operating conditions are reported and a summary of magnetic field measurements is given