Q1 for JLAB´s 12 Gev/c Super High Momentum Spectrometer

The reference design for the first Quadrupole magnet of TJNAF´s Super High Momentum Spectrometer (SHMS), Q1, is presented. The SHMS is a DQQQD design that will be capable of resolving particles up to 11 Gev/c in momentum. Q1 follows the successful design of the High Momentum Spectrometer´s (HMS) Q1, that of an elliptically shaped super ferric yoke, conformal mapped window frame coil, and helium bath cooled coil design. The primary differences between the two designs is in the choice of superconducting cable and an overall longer magnet length. A single stack of surplus SSC Rutherford NbTi cable replaces the original four stack copper stabilized conductor used in the HMS´s Q1. The SHMS Q1 will have a warm bore diameter of 400 mm and produce field gradients up to 9.1 T/m with an effective length of 2.14 m. Test coil windings progress will be given as well as reports on forces, conductor stability and energy margins.