[en] The cooldown and warmup characteristics of the coil will be constrained by either time or the facility itself. Design consideration has therefore been given to both constraints. When analyzed under the time constraint mode, the coil must cool down from 300K to 4K in 120 hours using cold helium gas. By using Joule heating in the conductor, the coil could be warmed up from 4K to 300K in the time limit of 60 hours. When analyzed under the facility constraint mode, both the cooldown and warmup must be achieved using a helium flow rate of 22 gm/sec at 15 atm. With this flow, cooldown requires 240 hours and warmup to 280K requires 160 hours. 3 refs