Measurements of the Persistent Current Decay and Snapback Effect in Tevatron Dipole Magnets

A systematic study of the persistent current decay and snapback effect in the fields of Tevatron accelerator dipoles was performed at the Fermilab Magnet Test Facility (MTF). The decay and snapback were measured under a range of conditions including variations of the current ramp parameters and magn...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2007-06, Vol.17 (2), p.1105-1108
Main Authors: Velev, G.V., Bauer, P., DiMarco, J., Hanft, R., Lamm, M., Schlabach, P., Sylvester, C., Tartaglia, M., Tompkins, J.C.
Format: Article
Language:English
Subjects:
Accelerator magnets
Accelerators
Applied sciences
Current measurement
Decay
Dipoles
Dynamic tests
Electrical engineering. Electrical power engineering
Electromagnets
Exact sciences and technology
History
Life estimation
Magnetic field measurement
Magnetic field measurements
Magnets
Performance evaluation
Persistent currents
Probes
Ramps
super-conducting accelerator magnets
Superconducting magnets
Superconductivity
Test facilities
Various equipment and components
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Summary:A systematic study of the persistent current decay and snapback effect in the fields of Tevatron accelerator dipoles was performed at the Fermilab Magnet Test Facility (MTF). The decay and snapback were measured under a range of conditions including variations of the current ramp parameters and magnet operational history. The study has mostly focused on the dynamic behavior of the normal sextupole component. In addition, the paper presents the persistent current effects observed in the other allowed field harmonics as well. The results provide new information about the previously observed "excess" decay during the first several seconds of the sextupole decay during injection and the correlation between the snapback amplitude and its duration.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2007.899973