1. June 12, 2003 JHC CRYOGENIC TESTING PREPARATION The racetrack coil requires a cooldown to and power testing at a temperature near 77K A 12 x 12 x 12” aluminum test module has been fabricated to qualify pedestrian insulation types for the above requirement 4” of layered spun glass duct board performed adequately without dew formation difficulties Primary lesson learned: A thin gas layer is desirable between the liquid tray and the underlying insulation Next step: Collaborate with EE’s on power feedthroughs

2. June 12, 2003 JHC INSULATION TEST MODULE 12” x 12” x 12” Test Module 2” Duct Board Sample

3. June 12, 2003 JHC INSULATION TEST MODULE, 2” TRIAL Gaseous Vent Dew/Frost Forming LN2 Feed Line