Cryogenic tests of glass-epoxy based electrical insulation

Conference · Sat Aug 01 04:00:00 EDT 1981

OSTI ID:6127090

Taylor, J D; Martin, P S; Pripstein, M; Green, M A

A thin superconducting solenoid for the Time Projection Chamber (TPC) experiment at PEP was constructed at Lawrence Berkeley Laboratory (LBL) in 1979 and tested in 1980. A failure of the ground plane insulation damaged the coil to the point that it required rebuilding. An extensive study of this failure indicated that an iron chip embedded in the bore tube had penetrated the insulation. Before rebuilding the coil, an investigation of the insulation system was done with the goal of determining the most reliable techniques and materials for withstanding high voltages in the coil package. The experience with the TPC coil and its prototypes indicate that glass cloth vacuum-impregnated with epoxy is an excellent material for cryogenic applications from the mechanical standpoint. Further, since the LBL assembly shop had extensive experience with the epoxy formulation used in the coil, there was reluctance to change that component. Therefore, the investigation concentrated on different types of glass cloth and on composites containing glass cloth.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6127090
• Report Number(s): LBL-12782; CONF-810835-11; ON: DE81028144
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONTROL EQUIPMENT
CRYOSTATS
DATA
DIELECTRIC PROPERTIES
ELECTRICAL EQUIPMENT
ELECTRICAL INSULATION
ELECTRICAL PROPERTIES
ELECTROMAGNETS
EPOXIDES
EQUIPMENT
EXPERIMENTAL DATA
FIBERGLASS
GAS TRACK DETECTORS
INFORMATION
MAGNETS
MEASURING INSTRUMENTS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PERFORMANCE
PHYSICAL PROPERTIES
PROJECTION SPARK CHAMBERS
RADIATION DETECTORS
SPARK CHAMBERS
SUPERCONDUCTING DEVICES
SUPERCONDUCTING MAGNETS
THERMOSTATS