Heat Transfer In Branched Channels Filled With He Ii

The critical heat flux q(GM) at which superfluidity is broken in branched channels has been measured. A reduction in q(GM) from the theoretical value becomes noticeable as the ratio of the channel width d to the channel length L increases, This geometry effect as a function of the aspect ratio d/L has been used for the estimation of the stability margin of superconducting magnets cooled with atmospherically pressurized He II.