Voltage spike and magnet quench behavior in the NHMFL 900 MHz bucket test

Author

Painter, Thomas A. ; Dixon, Iain R. ; Markiewicz, W. Denis

Author_Institution

National High Magnetic Field Lab., Tallahassee, FL, USA

Volume

14

Issue

2

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

1613

Lastpage

1616

Abstract

The NHMFL 105 mm wide bore 900 MHz NMR magnet and protection system were tested in an open bucket cryostat as a qualification test of the integrated system for the first time. The relevant aspects of the superconducting magnet configuration and bucket test operation are discussed. The unique voltage spike and magnet quench behavior are described. A discussion is provided to substantiate the thesis that interface instabilities are the cause of the quenches.

Keywords

cryostats; leakage currents; nuclear magnetic resonance; quenching (thermal); superconducting device testing; superconducting magnets; NHMFL 900 MHz system; NMR magnet; bucket test operation; magnet quench behavior; open bucket cryostat; protection system; qualification test; superconducting magnet configuration; voltage spike; Boring; Flanges; Magnetic separation; Niobium; Nuclear magnetic resonance; Protection; Superconducting coils; Superconducting magnets; System testing; Voltage; Cryogenics; NMR magnets; stability; superconductivity;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.831011

Filename

1325111