M. Sorbi, Study of back quench in the superconducting coils of the barrel toroid of ATLAS due to losses during a "slow" discharge of the magnet, IEEE APPL S, 11(1), 2001, pp. 1681-1684
An analysis of the losses in the Al matrix of the conductor and in the casi
ngs where the superconducting coils are located, due to a "slow discharge"
(heaters of the coils off) of the Barrel Toroid of ATLAS has been carried o
ut. The values of the losses have been calculated and cross checked by mean
s of different analytical and F,E, approaches, and simple relations have be
en carried out in order to correlate them with the main electrical paramete
rs of the magnet. With a thermal analysis, the increase of temperature in t
he superconducting coils due to these extra losses has been calculated, The
temperature margin (i.e. difference between current sharing temperature an
d operating temperature) has been calculated and compared with the temperat
ure margin during the normal run of the magnet.