Tests of 40 mm SSC dipole model magnets with vertically split yokes

Several 1-m-long, 40-mm-aperture model SSC (Superconducting Super Collider) dipole magnets with vertically split yokes have been built and tested at Fermilab. In addition to the yoke design, the magnets were used to evaluate several variants of the collet clamps which apply prestress to the magnet ends. The magnets were instrumented with voltage taps for quench localization and strain-gauge-based devices for measuring stresses, forces, and deflections resulting from cooldown and excitation. Tests were carried out in a vertical dewar at temperatures from 3.8 K to 4.4 K. The quench and mechanical behavior of these magnets is presented and magnetic field measurements are shown. A comparison with an earlier series of magnets with horizontally split yokes is made.<>