JLAB's Super High Momentum Spectrometer's Superconducting Q1 Magnet

The commissioning and test results of a superferric superconducting quadrupole magnet constructed by Scientific Magnetics, Inc., for Thomas Jefferson National Accelerator Facility (TJNAF also known as JLAB) will be presented. The quadrupole magnet, named Q1, is the first focusing element in the Super High Momentum Spectrometer (SHMS). The SHMS, which is located within JLAB's experimental Hall C, consists of all superconducting magnets in a dQQQD configuration and is part of the JLAB's 12-GeV upgrade. Here, “d” refers to the small horizontal bend dipole, “Q” stands for focusing quadrupole magnets, and “D” is the vertical-bending momentum-selecting dipole magnet. Characterization of the magnet's cryogenic heat loads and magnetic field quality will be presented along with descriptions of the magnet's control system, power supply, and quench detection system.