greg.grabeel@LIGO.ORG - posted 11:07, Friday 23 May 2014 - last comment - 15:21, Friday 23 May 2014(12052)
LTS
The long term storage Nitrogen purge system has started testing today. It will be venting through a regulator and hose near HAM12 over the weekend. This purging shouldn't have an impact on any activities inside the LVEA. CP2 levels may need increased attention until we can see the impact that the purge line has on the LN2 dewar.
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After the Nitrogen gas has had an opportunity to flow for a couple of hours the initial signs are looking good. The dewpoint is < -40° tdC and the pressure drop from the CP2 dewar to the end of the line pressure regulator looks to be < 1psi. I added a flow meter to the exhaust of CP2 and it looks like most of the boil-off is being redirected. Everything is looking good to start a test next week and check the overall cleanliness.
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