Quench Protection for the MICE Cooling Channel Coupling Magnet

Author

Guo, X.L. ; Xu, F.Y. ; Wang, L. ; Green, M.A. ; Pan, H. ; Wu, H. ; Liu, X.K. ; Jia, X. ; Amm, K.

Author_Institution

Inst. of Cryogenics & Superconductive Technol., HIT, Harbin, China

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

1360

Lastpage

1363

Abstract

This paper describes the passive quench protection system selected for the muon ionization cooling experiment (MICE) cooling channel coupling magnet. The MICE coupling magnet will employ two methods of quench protection simultaneously. The most important method of quench protection in the coupling magnet is the subdivision of the coil. Cold diodes and resistors are put across the subdivisions to reduce both the voltage to ground and the hot-spot temperature. The second method of quench protection is quench-back from the mandrel, which speeds up the spread of the normal region within the coils. Combining quench back with coil subdivision will reduce the hot spot temperature further. This paper explores the effect on the quench process of the number of coil sub-divisions, the quench propagation velocity within the magnet, and the shunt resistance.

Keywords

copper; diodes; multifilamentary superconductors; niobium alloys; resistors; superconducting coils; superconducting magnets; titanium alloys; MICE; NbTi-Cu; coil subdivisions; cold diodes; copper matrix; hot-spot temperature; multifilamentary superconductors; muon ionization cooling experiment cooling channel coupling magnet; passive quench protection system; quench propagation velocity; resistors; shunt resistance; superconducting magnets; Passive quench protection; quench back; subdivision protection; superconducting magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2018054

Filename

5109552