Performance of the 1-m model of the 70 mm bore twin-aperture superconducting quadrupole for the LHC insertions

Individually powered twin-aperture superconducting quadrupoles with a coil bore of 70 mm will be installed in certain areas of the LHC insertions wher e increased geometrical acceptance is required. A 1-m twin-aperture model o f the quadrupole, featuring a four-layer coil with a nominal gradient of 16 0 T/m at 4.5K, has been recently built and tested. In this report we presen t the quench performance of the magnet, and discuss the results of the quen ch protection studies and magnetic field measurements.