Dewar Warmed Up

Friday, December 11, 2015 9:21 AM

Problem(s) Encountered:

WIth the bad weather, I never opened nor closed.  As a result, I stupidly forgot to refill the dewar and the CCD warmed to -3 C.


Came up to verify that all looked ok with the detector as well as to pump on it prior to refilling, just to be safe.  Waited until the temperature for the detector was above freezing before pumping and cooling.  If the dewar ever warms up, especially this much, it is imperative to notify staff before simply refilling as ice can form on the window or chip.