1.8 K conditioning (non-quench training) of model SSC dipoles

The accepted hypothesis is that training quenches are caused by heat generation when conductors move under Lorentz force. Afterwards no conductor motion will occur until a higher field and greater Lorentz force acts. If superior heat transfer and/or greater temperature margin is provided by operatin...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on magnetics 1987-03, Vol.23 (2), p.1229-1232
Main Authors: Gilbert, W., Hassenzahl, W.
Format: Article
Language:English
Subjects:
Coils
Conductors
Current density
Friction
Heat transfer
Insulation
Lorentz covariance
Magnets
Temperature dependence
Testing
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The accepted hypothesis is that training quenches are caused by heat generation when conductors move under Lorentz force. Afterwards no conductor motion will occur until a higher field and greater Lorentz force acts. If superior heat transfer and/or greater temperature margin is provided by operating at lower bath temperature, one might expect that the heat generated by conductor motion will not cause a runaway temperature increase, or quench. To test this hypothesis, the central dipole field in SSC model magnets was ramped at 1.8 K to 7.1 tesla without the magnets' quenching. The bath was then raised to 4.4 K and the magnets quenched at their short sample limits of 6.6 tesla or higher. Comparison with similar magnets trained in He I at 4.4 K is made and the significance of the nonquench training on system operation is discussed.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.1987.1064853