Thermal performance of various multilayer insulation systems below 80K

Conference · Wed Apr 01 04:00:00 EST 1992

OSTI ID:10139079

Boroski, W N; Nicol, T H; Schoo, C J

The SSC collider dipole cryostat consists of a vacuum shell operating at room temperature, two thermal shields operating near 80K and 20K respectively, and the superconducting magnet assembly operating near 4K. The cryostat design incorporates multilayer insulation (MLI) blankets to limit radiant heat transfer into the 80K and 20K thermal shields. Also, an MLI blanket is used to impede heat transfer through residual gas conduction into the 4K superconducting magnet assembly. A measurement facility at Fermilab has been used to experimentally optimize the thermal insulation system for the dipole cryostat. Previous thermal measurements have been used to define the 80K MLI system configuration and verify system performance. With the 80K MLI system defined, the current effort has focused on experimentally defining the optimum insulation scheme for the 20K thermal shield. The SSC design specification requires that radiant heat transfer be limited to 0.093 W/m{sup 2} at an insulating vacuum of 10{sup {minus}6}torr.

• Research Organization: Fermi National Accelerator Lab., Batavia, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 10139079
• Report Number(s): FNAL/C--92/96; CONF-920331--67; ON: DE93009597
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303
CRYOSTATS
DESIGN
EXPERIMENTAL FACILITIES AND EQUIPMENT
HEAT TRANSFER
LAYERS
PERFORMANCE
SUPERCONDUCTING MAGNETS
SUPERCONDUCTING SUPER COLLIDER
TEMPERATURE MEASUREMENT
THERMAL INSULATION