From jperez at snf.stanford.edu Tue Apr 5 14:55:46 2011 From: jperez at snf.stanford.edu (jperez at snf.stanford.edu) Date: Tue, 5 Apr 2011 14:55:46 -0700 Subject: Shutdown metalica SNF 2011-03-25 20:11:49: Gate valve not functional Message-ID: Gate Valve was rebuilt and is working. I will take more then one full turn when trying to reach 5.0x10-3 From jperez at snf.stanford.edu Tue Apr 5 14:56:17 2011 From: jperez at snf.stanford.edu (jperez at snf.stanford.edu) Date: Tue, 5 Apr 2011 14:56:17 -0700 Subject: Problem metalica SNF 2011-03-25 20:11:24: Gate valve not functional Message-ID: Gate valve has been rebuilt and is working. From jperez at snf.stanford.edu Tue Apr 5 14:56:36 2011 From: jperez at snf.stanford.edu (jperez at snf.stanford.edu) Date: Tue, 5 Apr 2011 14:56:36 -0700 Subject: Problem metalica SNF 2011-03-25 11:31:22: Gate valve is stuff and getting harder to move Message-ID: Rebuilt Gate valve. From jperez at snf.stanford.edu Tue Apr 5 14:58:03 2011 From: jperez at snf.stanford.edu (jperez at snf.stanford.edu) Date: Tue, 5 Apr 2011 14:58:03 -0700 Subject: Problem metalica SNF 2011-03-11 10:51:01: Gate Valve setting not normal to get the same pressure Message-ID: Rebuilt gate vale and having to turn gate valve more then one full turn to reach 5.0X10-3 From jperez at snf.stanford.edu Tue Apr 5 15:06:22 2011 From: jperez at snf.stanford.edu (jperez at snf.stanford.edu) Date: Tue, 5 Apr 2011 15:06:22 -0700 Subject: Comment metalica SNF 2011-04-05 15:06:22: Metalica's Gate Valve is back up -rebuilt Message-ID: Please make sure you verify your thicknesses. Alum Metal looks clear. The Gate Valve will stop turning when fully open. The Gate Valve will stop turning when fully closed. It isn't like the roughing valve that keeps spinning on either end (OPEN OR CLOSED). From carterlin at snf.stanford.edu Sun Apr 10 15:28:06 2011 From: carterlin at snf.stanford.edu (carterlin at snf.stanford.edu) Date: Sun, 10 Apr 2011 15:28:06 -0700 Subject: Shutdown metalica SNF 2011-04-10 15:28:06: Unable to pump down Message-ID: At the start of my session, I realize the Hoist Ready light is on and the pressure gauge shows atm pressure. it seems that previous user did not pump down the chamber. After loading, unable to pump down the chamber with roughing pump for 15min. Pressure gauge sits at atm. Usually the chamber can be pumped down to 30 micron after 5 min. After closing roughing valve, the valve does NOT keep turning but comes to a stop, at which position giving off a hissing sound and roughing pump noise. Mistakenly open gate valve at this stage, hearing noise and observing cryopump temp going up. Turn off gate valve immediately and cryotemp shoots up to 59K max and gradually comes down From emyers at snf.stanford.edu Mon Apr 11 16:28:59 2011 From: emyers at snf.stanford.edu (emyers at snf.stanford.edu) Date: Mon, 11 Apr 2011 16:28:59 -0700 Subject: Comment metalica SNF 2011-04-11 16:28:58: tested system Message-ID: I can not tell if it's a faulty valve or pump. I tried pumping down the system by opening the roughing valve before turning on the pump and opening the valve after turning on the pump. Both failed. From jhaydon at snf.stanford.edu Tue Apr 12 15:16:48 2011 From: jhaydon at snf.stanford.edu (jhaydon at snf.stanford.edu) Date: Tue, 12 Apr 2011 15:16:48 -0700 Subject: Shutdown metalica SNF 2011-04-10 15:28:06: Unable to pump down Message-ID: new roughing valve installed old one was leaking From jhaydon at snf.stanford.edu Tue Apr 12 15:17:25 2011 From: jhaydon at snf.stanford.edu (jhaydon at snf.stanford.edu) Date: Tue, 12 Apr 2011 15:17:25 -0700 Subject: Comment metalica SNF 2011-04-11 16:28:58: tested system Message-ID: new roughing valve installed From suyog at snf.stanford.edu Wed Apr 13 05:56:50 2011 From: suyog at snf.stanford.edu (suyog at snf.stanford.edu) Date: Wed, 13 Apr 2011 05:56:50 -0700 Subject: Problem metalica SNF 2011-04-13 05:56:49: Extremely slow pump down Message-ID: 2hr pump down to 1e-6 in the last run From carterlin at snf.stanford.edu Wed Apr 13 18:16:10 2011 From: carterlin at snf.stanford.edu (carterlin at snf.stanford.edu) Date: Wed, 13 Apr 2011 18:16:10 -0700 Subject: Comment metalica SNF 2011-04-13 18:16:10: pumping fine for me Message-ID: This morning I pumped the chamber for 5min with roughing and then cryo for 55min and got to 1.22e-6 pressure From jperez at snf.stanford.edu Mon Apr 18 08:26:46 2011 From: jperez at snf.stanford.edu (jperez at snf.stanford.edu) Date: Mon, 18 Apr 2011 08:26:46 -0700 Subject: Comment metalica SNF 2011-04-05 15:06:22: Metalica's Gate Valve is back up -rebuilt Message-ID: New gate valve and another new roughing valve. OK now From jperez at snf.stanford.edu Mon Apr 18 08:28:36 2011 From: jperez at snf.stanford.edu (jperez at snf.stanford.edu) Date: Mon, 18 Apr 2011 08:28:36 -0700 Subject: Comment metalica SNF 2011-03-22 18:48:37: Roughing pump valve Message-ID: New roughing valve, remove latest roughing valve. This newer roughing valve is like the old one. It stops turning when fully open or closed. From suyog at snf.stanford.edu Tue Apr 19 00:57:16 2011 From: suyog at snf.stanford.edu (suyog at snf.stanford.edu) Date: Tue, 19 Apr 2011 00:57:16 -0700 Subject: Problem metalica SNF 2011-04-19 00:57:15: Cryo temp too high Message-ID: Cryo temp close to 70K. Difficult to pump chamber down. From suyog at snf.stanford.edu Tue Apr 19 00:57:54 2011 From: suyog at snf.stanford.edu (suyog at snf.stanford.edu) Date: Tue, 19 Apr 2011 00:57:54 -0700 Subject: Problem metalica SNF 2011-04-19 00:57:53: Cryo temp too high Message-ID: Cryo temp close to 70K. Difficult to pump down From suyog at snf.stanford.edu Tue Apr 19 00:59:04 2011 From: suyog at snf.stanford.edu (suyog at snf.stanford.edu) Date: Tue, 19 Apr 2011 00:59:04 -0700 Subject: Problem metalica SNF 2011-04-19 00:59:03: Cryo temp too high Message-ID: Cryo temp close to 70K From jperez at snf.stanford.edu Tue Apr 19 11:54:51 2011 From: jperez at snf.stanford.edu (jperez at snf.stanford.edu) Date: Tue, 19 Apr 2011 11:54:51 -0700 Subject: Shutdown metalica SNF 2011-04-19 11:54:50: in Regen Message-ID: From jperez at snf.stanford.edu Tue Apr 19 13:09:50 2011 From: jperez at snf.stanford.edu (jperez at snf.stanford.edu) Date: Tue, 19 Apr 2011 13:09:50 -0700 Subject: Shutdown metalica SNF 2011-04-19 11:54:50: in Regen Message-ID: Regen complete From jperez at snf.stanford.edu Tue Apr 19 13:10:19 2011 From: jperez at snf.stanford.edu (jperez at snf.stanford.edu) Date: Tue, 19 Apr 2011 13:10:19 -0700 Subject: Problem metalica SNF 2011-04-19 00:59:03: Cryo temp too high Message-ID: Did regen. OK to use From jperez at snf.stanford.edu Tue Apr 19 13:10:35 2011 From: jperez at snf.stanford.edu (jperez at snf.stanford.edu) Date: Tue, 19 Apr 2011 13:10:35 -0700 Subject: Problem metalica SNF 2011-04-19 00:57:53: Cryo temp too high Message-ID: Regen complete, OK to use From jperez at snf.stanford.edu Tue Apr 19 13:10:50 2011 From: jperez at snf.stanford.edu (jperez at snf.stanford.edu) Date: Tue, 19 Apr 2011 13:10:50 -0700 Subject: Problem metalica SNF 2011-04-19 00:57:15: Cryo temp too high Message-ID: Regen complete, OK to use