000170599 001__ 170599
000170599 005__ 20190812205548.0
000170599 0247_ $$2doi$$a10.1109/Tasc.2011.2176455
000170599 02470 $$2ISI$$a000307364700199
000170599 037__ $$aCONF
000170599 245__ $$aDesign of a quench protection system for a coated conductor insert coil
000170599 269__ $$a2012
000170599 260__ $$bIEEE-Inst Electrical Electronics Engineers Inc$$c2012$$aPiscataway
000170599 300__ $$a4
000170599 336__ $$aConference Papers
000170599 520__ $$aCoated conductors are promising material for the construction of high field magnets, but the slow propagation velocity of the normal zone makes the protection against quenches a critical issue. The quench protection system for a small insert coil under development at CRPP has been studied. The voltage drop and the hot spot temperature during the quench have been estimated using analytical expressions; the cross section of the copper stabilizer, the voltage threshold and the time constant were set as parameters. Detailed calculations have been carried out using the Cryosoft code THEA. The copper cross section available from the tape manufacturer is enough to ensure that the hot spot temperature remains below 200 K, but only in conjunction with a sensitive quench detection system (voltage threshold lower than 100 mV) and a fast dumping time (time constant shorter than 100 ms). These requirements can be fulfilled in the small insert coil under construction, because the inductance is about 50 mH and because the coil can be quickly discharged independently from the main magnet. The passive protection circuit consists of dump resistor and diodes. In case of longer time constants (few seconds), a larger copper cross section (comparable to the one used in low temperature superconducting magnets) is required in order to maintain the temperature within safe values.
000170599 6531_ $$asuperconductivity
000170599 700__ $$0244063$$g206422$$aUglietti, Davide
000170599 700__ $$aMarinucci, Claudio$$g105759$$0240107
000170599 7112_ $$dSeptember 11-16, 2011$$cMarseille, France$$aMT-22, International Conference on Magnet Technology
000170599 773__ $$j22$$tIEEE Transactions On Applied Superconductivity$$k3$$q4702704
000170599 909C0 $$pCRPP
000170599 909C0 $$pSPC$$0252028$$xU10136$$xU12267$$xU12269$$xU12271$$xU10559$$xU12273$$xU10557$$xU12270$$xU10137$$xU10636$$xU12266$$xU10635$$xU10558$$xU12268$$xU12272
000170599 909CO $$pconf$$pSB$$ooai:infoscience.tind.io:170599
000170599 917Z8 $$x218840
000170599 917Z8 $$x105317
000170599 917Z8 $$x218840
000170599 917Z8 $$x218840
000170599 917Z8 $$x105317
000170599 937__ $$aEPFL-CONF-170599
000170599 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000170599 980__ $$aCONF