Christina Hammock and CRYO--2005

Here's Christina Hammock in what then was the cryo office, a small hut next to the
original cryo barn. On 20 September 2005 she gave Mike Hole and myself a
tour of the cryo operations.

November 2004...she's flying south on an LC-130 with a couple of liquid helium dewars. Liquid helium is at -393ºF or -236ºC, only a few degrees above absolute zero. As of 2013 the stuff is still used to cool the telescope detectors in the dark sector, but they now recycle and recompress their helium so they no longer require liquid helium replenishment (photo from the NSF USAP Antarctic Photo Library).

Here she is at Pole, in front of the cargo office, on a cargo sled which holds one of the large dewars. This photo is also from the NSF USAP Antarctic Photo Library.

Here Christina watches me as we're in the cryo barn ready to transfer LHe into that dewar.

And here I am with the lance.

Christina is watching Mike Hole with the lance, as gaseous helium vents.

Mike holds the hose during the transfer.