From yeh at snf.stanford.edu Mon Feb 4 14:14:55 2008 From: yeh at snf.stanford.edu (yeh at snf.stanford.edu) Date: Mon, 4 Feb 2008 14:14:55 -0800 Subject: Comment xactix SNF 2008-02-04 14:14:55: source chamber leak? Message-ID: expansion chamber was at 0.3torr. when i opened the source chamber valve, the pressure went up to >46torr. xef2 crystals sublimates to 4torr at room temp. leak into source chamber likely. From emyers at snf.stanford.edu Mon Feb 4 15:29:19 2008 From: emyers at snf.stanford.edu (emyers at snf.stanford.edu) Date: Mon, 4 Feb 2008 15:29:19 -0800 Subject: Problem xactix SNF 2008-02-04 15:29:18: Source Chamber Leak Message-ID: expansion chamber was at 0.3torr. when i opened the source chamber valve, the pressure went up to >46torr. xef2 crystals sublimates to 4torr at room temp. leak into source chamber likely. Per Lab Member From eenriquez at snf.stanford.edu Wed Feb 6 12:25:24 2008 From: eenriquez at snf.stanford.edu (eenriquez at snf.stanford.edu) Date: Wed, 6 Feb 2008 12:25:24 -0800 Subject: Comment xactix SNF 2008-02-06 12:25:21: Update Message-ID: Closed off the XeF2 cylinder valve and ran a leak up test on the rest of the gas line. Leak rate is about 10 mT/min. I have no baseline so I do not know if this is normal. User observed that the cylinder pressure went up to about 8 Torr (should be 4 Torr). He will check the pressure again tomorrow. From yeh at snf.stanford.edu Fri Feb 15 08:04:53 2008 From: yeh at snf.stanford.edu (yeh at snf.stanford.edu) Date: Fri, 15 Feb 2008 08:04:53 -0800 Subject: Comment xactix SNF 2008-02-15 08:04:53: leak update Message-ID: there is a leak between valve 1 and the source bottle manual valve. closed source bottle manual valve for up to 3 days and then opened up the bottle to the expansion chamber to measure the pressure. pressure was 4 torr +/- 0.02 torr as expected. From yeh at snf.stanford.edu Fri Feb 15 16:37:57 2008 From: yeh at snf.stanford.edu (yeh at snf.stanford.edu) Date: Fri, 15 Feb 2008 16:37:57 -0800 Subject: Comment xactix SNF 2008-02-15 16:37:56: more leak data Message-ID: in ~6hrs since last use, source and expansion chamber pressure increased to 7.6torr. normal should be 4torr at RT. this is a fast leak. From yeh at snf.stanford.edu Mon Feb 18 10:15:01 2008 From: yeh at snf.stanford.edu (yeh at snf.stanford.edu) Date: Mon, 18 Feb 2008 10:15:01 -0800 Subject: Comment xactix SNF 2008-02-18 10:15:01: leak Message-ID: source bottle and expn chamber pressure at 53.7torr. should be at 4torr. From mdickey at snf.stanford.edu Wed Feb 27 13:16:13 2008 From: mdickey at snf.stanford.edu (mdickey at snf.stanford.edu) Date: Wed, 27 Feb 2008 13:16:13 -0800 Subject: Comment xactix SNF 2008-02-27 13:16:13: Gas bottle Message-ID: disconnected gas bottle and re sealed fitting and new gasket. Ready for leak check by user