Institut de recherche sur les lois fondamentales de l'Univers

In support of the luminosity upgrade of the Large Hadron Collider (LHC), the US LHC Accelerator Research Program (LARP) has been developing a 1-meter long, 120 mm bore Nb₃Sn IR quadrupole magnet (HQ). With a short sample gradient of 219 T/m at 1.9 K and a conductor peak field of 15 T, the magnet will operate under higher forces and stored-energy levels than that of any previous LARP magnet models. The first 6 coils (out of the 8 fabricated so far) have been assembled and used in two separate tests - HQ01a and HQ01b. In this talk, the HQ design parameters, assemblies, mechanical behavior and performance of HQ01a and HQ01b will be presented.