Stress relaxation in SSC 50mm dipole coils

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

OSTI ID:7160738

Rogers, D; Markley, F

We are measuring the stress relaxation of SSC 50mm outer coils with the goal of predicting how much of the coil prestress will be lost while the coils are warehoused between manufacture and cooldown. We manufacture 3 inch (76.2mm) long segments of coil with the same materials and techniques that have been used for prototype coils. We are running four simultaneous tests in an attempt to separate the contributions of the different coil materials. Test one is a completely insulated coil section where the insulation is the all polyamide system being tested at Brookhaven; test two is a wire stack insulated only with the normal Kapton overwrap; test three is a stack of bare cable; and test four is a completely insulated normal coil section. All, except for the bare cable, include the ground insulation. The insulated coil sections are carefully dried before loading and testing in order to eliminate stress changes due to varying moisture content. The temperature dependence of the stress relaxation is being studied separately. Three companion papers presented at this conference will be: (1) Temperature dependence of the viscoelastic properties of SSC coil insulation'' (2) Measurement of the elastic modulus of Kapton perpendicular to the plane of the film at room and cryogenic temperatures'' (3) Theoretical methods for creep and stress relaxation studies of SSC coil.''

• Research Organization: Fermi National Accelerator Lab., Batavia, IL (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 7160738
• Report Number(s): FNAL/C-92/97; CONF-920331-56; ON: DE93000619
• Resource Relation: Conference: International industrial symposium on the super collider, New Orleans, LA (United States), 4-6 Mar 1992
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
SUPERCONDUCTING COILS
STRESS RELAXATION
CREEP
EXPERIMENTAL DATA
MAGNETIC DIPOLES
SUPERCONDUCTING MAGNETS
SUPERCONDUCTING SUPER COLLIDER
THERMAL INSULATION
DATA
DIPOLES
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
INFORMATION
MAGNETS
MECHANICAL PROPERTIES
MULTIPOLES
NUMERICAL DATA
RELAXATION
STORAGE RINGS
SUPERCONDUCTING DEVICES
430303* - Particle Accelerators- Experimental Facilities & Equipment