Quench Propagation Kinetics Within ‘Iseult/INUMAC’ Whole Body 11.7 T MRI Magnet Shielding Coils

Author

Juster, F.P. ; Berriaud, C. ; Fazilleau, P.

Author_Institution

Centre de Saclay, Commissariat a l´´Energie Atomique, Gif-sur-Yvette, France

Volume

20

Issue

3

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1818

Lastpage

1822

Abstract

In the framework of the French-German consortium Iseult/INUMAC, focused on very-high-magnetic-field molecular imaging, the development of an 11.7 T whole body MRI magnet has been launched in 2006. This magnet is mainly composed of one wet and cryostable main coil and two fully impregnated coils that shield the magnetic field in order to meet the security requirements on the fringe field. To protect the magnet in case of quench, the stored magnetic energy (338.5 MJ) is dissipated in an external resistor and inside the two shielding coils windings. It is thus an important issue to master the normal zone propagation kinetics in those coils. This paper presents the 3d finite-element computations carried out to treat that problem and the more significant obtained results.

Keywords

biomedical MRI; biomedical equipment; cryogenics; finite element analysis; superconducting coils; superconducting magnets; superconducting transitions; 3D finite element computation; AD 2006; Iseult-Inumac magnet; MRI magnet shielding coils; cryostable main coil; energy 338.5 MJ; fringe field security requirements; impregnated coils; magnet protection; magnetic flux density 11.7 T; normal zone propagation kinetics; quench propagation kinetics; stored magnetic energy; very high magnetic field molecular imaging; wet main coil; whole body MRI magnet; Heaters; hot spot temperature; protection; quench propagation;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2010.2041759

Filename

5439817