magnet warmup Nov. 1998
First the He plant was shut down and the liquid Nitrogen cooling of the shield was stopped.
After the coils reached a temperature of about 150 K, a warmup powersupply was connected to the coils. The coils were heated by a current of about 10 A. In the figure below, the temperatures are shown when the heating was started, after 38hours and 62hours, respectively.
last modified 29.11.98
by Wolfgang Koenig