The cryogenic system for the MTL magnet test stands

This paper briefly describes the cryogenic test capabilities of the Magnet Test Laboratory (MTL). The instrumentation for controlling the operating condition of the magnet cryogenic test and for verifying the requirements of the SSC magnet performance is introduced. The development of the thermometer system, particularly the He vapor pressure thermometers with differential pressure transducer, is presented in detail. The 10-kA vapor-cooled power leads were optimized thermally, with consideration for the different fin shapes, diameters, lengths, and RRRs of the power lead material. Two mechanical designs were introduced. The anti-cryostats, so-called warm bore and warm finger, that provide a warm environment to allow the magnetic field-measuring probe to run through the 4.2-K beam tube are described. The warm finger for SSC short-magnet cryogenic tests was manufactured and successfully used. Finally, the feed and end cans -- used to provide cryogens to the magnet being tested as well as cryogenic vacuum -- and the support of other instrumentation are described.