[time-nuts] Variable Conductance Heat Pipes for temperature control

[Joseph M Gwinn]

I have the book now.  The VHCP used to control the temperature of a Cesium 
(not Rubidium) clock utilized in a GPS ground station is stated as 
maintaining clock temperature at 57 C +/- 13 C despite a ambient 
temperature range of -25 C to +55 C, while handling 5 watts of heat.  This 
is a 3: reduction in temperature range.  I bet that one can achieve larger 
ratios if the ambient temperature range is narrower.