Upgrades to the liquid xenon test system completed

By Liang Yang
December 7, 2016

The liquid xenon apparatus is designed for testing cryogenics and electronics for nEXO experiment.   It went through an upgrade in summer 2016 to move the external heat exchanger into the main vacuum chamber, and connect it directly to the cryo-cooler.   The upgrade was designed by undergraduate Pan Ji with help from the NPL technical staff.  The tight spacing between the components made the construction particularly tricky, but nothing is impossible for the ingenious staff at NPL.  The chamber has been sealed, leak checked and moved back to Loomis today.    We expect to liquid xenon and test the efficiency of the heat exchanger in early 2017.