The US LARP (LHC Accelerator Research Program), in collaboration with CERN, has started developing prototypes of the low-beta Quadrupoles (MQXF) for the High Luminosity Upgrade of the LHC at CERN. These large aperture (150 mm) high gradient (133 T/m) quadrupoles will use Nb3Sn conductor to replace the present 70-mm aperture NbTi quadrupoles.
The first LARP prototype (MQXFA1) has coils with 4 m magnetic length produced at BNL and FNAL. The Al-shell based structure was assembled at LBNL. Test at 1.9 K is in progress at BNL. This test is an important milestone toward the full approval of the High Luminosity LHC Accelerator Upgrade Project (HL-LHC-AUP), which will fabricate and test the upgraded Q1 and Q3 elements of the LHC Inner Triplets, using CERN supplied cryostats.
In this paper we present the status of MQXFA1 test, the status of the HL-LHC-AUP project preparation, and the plan for next steps.