Sudden flux change studies in high field superconducting accelerator magnets

Author

Feher, S. ; Bordini, B. ; Carcagno, R. ; Makulski, A. ; Orris, D.F. ; Pischalnikov, Y.M. ; Sylvester, C. ; Tartaglia, M. ; Tompkins, J.C. ; Zlobin, A.V.

Author_Institution

Fermi Nat. Accel. Lab., USA

Volume

15

Issue

2

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

1591

Lastpage

1594

Abstract

As part of the High Field Magnet Program at Fermilab many magnets have been tested which utilize multi strand Rutherford type cable made of state-of-the art Nb₃Sn strands. During these magnet tests we observed sudden flux changes by monitoring coil voltages and the magnetic field close to the magnets. These flux changes might be linked to magnet instabilities. The voltage spike signals were correlated with quench antenna signals, a strong indication that these are magnet phenomena. With a new high resolution voltage spike detection system, we were able to observe the detailed structure of the spikes. Two fundamentally different signal shapes were distinguished, most likely generated by different mechanisms.

Keywords

accelerator magnets; materials testing; multifilamentary superconductors; niobium alloys; signal detection; superconducting cables; tin alloys; voltage measurement; Fermilab; High Field Magnet Program; Nb₃Sn; Nb₃Sn strand; coil voltage monitoring; high field superconducting accelerator magnet; magnet instability; magnet phenomena; magnet testing; magnetic field monitoring; multistrand Rutherford type cable; quench antenna signal; sudden flux change study; voltage spike detection system; voltage spike signal; Accelerator magnets; Art; Magnetic flux; Niobium; Superconducting cables; Superconducting coils; Superconducting magnets; Testing; Tin; Voltage; Accelerator; high field dipole; magnet;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.849186

Filename

1439951