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Title: Stress relaxation in SSC 50mm dipole coils

Abstract

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 planemore » of the film at room and cryogenic temperatures`` (3) ``Theoretical methods for creep and stress relaxation studies of SSC coil.``« less

Authors:
;
Publication Date:
Research Org.:
Fermi National Accelerator Lab., Batavia, IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10182050
Report Number(s):
FNAL/C-92/97; CONF-920331-56
ON: DE93000619
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Technical Report
Resource Relation:
Conference: 4. international industrial symposium on the Super Collider,New Orleans, LA (United States),4-6 Mar 1992; Other Information: PBD: Apr 1992
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; SUPERCONDUCTING COILS; STRESS RELAXATION; CREEP; SUPERCONDUCTING SUPER COLLIDER; SUPERCONDUCTING MAGNETS; MAGNETIC DIPOLES; THERMAL INSULATION; EXPERIMENTAL DATA; 430303; EXPERIMENTAL FACILITIES AND EQUIPMENT

Citation Formats

Rogers, D, and Markley, F. Stress relaxation in SSC 50mm dipole coils. United States: N. p., 1992. Web. doi:10.2172/10182050.
Rogers, D, & Markley, F. Stress relaxation in SSC 50mm dipole coils. United States. https://doi.org/10.2172/10182050
Rogers, D, and Markley, F. Wed . "Stress relaxation in SSC 50mm dipole coils". United States. https://doi.org/10.2172/10182050. https://www.osti.gov/servlets/purl/10182050.
@article{osti_10182050,
title = {Stress relaxation in SSC 50mm dipole coils},
author = {Rogers, D and Markley, F},
abstractNote = {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.``},
doi = {10.2172/10182050},
url = {https://www.osti.gov/biblio/10182050}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1992},
month = {4}
}