Analyse du comportement thermique de l'aimant hybride de 45 T du NHMFL.
Analysis of the NHMFL 45-T hybrid magnet thermal behaviour.
Auteurs : MAO S., LUONGO C. A., MILLER J. R.
Résumé
The superconducting outsert of the NHMFL (National High Magnetic Field Laboratory) 45 T is cooled by static He II contained in cable-in-conduit conductors, which must be capable of extracting any internal heat (primarily from hysteresis losses) during a ramp from zero to full field. In the event that the ramping losses exceed the cooling capacity of the He II, the long cooling channels become partially or completely filled by He I and even the relatively weak heating of index losses can lead to slow thermal runaway and a delayed quench. A numerical analysis is presented using a one-dimensional model of heat transfer in a column of superfluid helium. The model considers each of the six layers in the innermost coil as independent channels, yet coupled through heat transfer across conduit and insulation. The computational results are compared with experimental data, showing good agreement with the observed quench behaviour.
Détails
- Titre original : Analysis of the NHMFL 45-T hybrid magnet thermal behaviour.
- Identifiant de la fiche : 2005-0035
- Langues : Anglais
- Date d'édition : 03/2003
- Source : Source : Cryogenics/Proc. CHATS-2002, Karlsruhe
vol. 43; n. 3-5; 153-163; fig.; tabl.; 20 ref.
Indexation
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Thermohydraulics of quenches and helium recover...
- Auteurs : CHOROWSKI M., LEBRUN P., SERIO L., WEELDEREN R. van
- Date : 05/1998
- Langues : Anglais
Voir la fiche
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Implementation of the superfluid helium phase t...
- Auteurs : BIELERT E. R., VERWEIJ A. P., KATE H. H. J. ten
- Date : 01/2013
- Langues : Anglais
- Source : Cryogenics - vol. 53
Voir la fiche
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Modelling He I-He II phase transformation in lo...
- Auteurs : SITKO M., SKOCZEN B.
- Date : 01/2009
- Langues : Anglais
- Source : International Journal of Heat and Mass Transfer - vol. 52 - n. 1-2
Voir la fiche
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STABILITY IN ACCELERATOR DIPOLES IN HELIUM I AN...
- Auteurs : HASSENZAHL W.
- Date : 16/11/1981
- Langues : Anglais
- Source : Stability of superconductors.
- Formats : PDF
Voir la fiche
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CHARACTERISTICS OF THE QUENCHING PROCESS OF SUP...
- Auteurs : KOBAYASHI H., YASUKOCHI K., FUSE K.
- Date : 16/11/1981
- Langues : Anglais
- Source : Stability of superconductors.
- Formats : PDF
Voir la fiche