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ID Date Author Type Category Subject Text   5759   Fri Oct 28 18:33:59 2011 steve Update VAC leaking nitrogen line fixed I was lucky to notice that the nitrogen supply line to the vacuum valves was leaking. Closed ALL valves. Open supply line to atm.      5767   Mon Oct 31 08:55:19 2011 steve Update VAC pressure plot at day 53                                5887   Mon Nov 14 15:46:14 2011 steve Update VAC TP2's forepump changed The foreline pressure of TP2 was 1.4 Torr this morning. This drypump worked well for ten months.      5950   Fri Nov 18 16:37:14 2011 steve Update VAC preparing for ac power interruption The vacuum is ready for no AC power for 1 hr on Sunday morning at 10am        5962   Sun Nov 20 13:51:54 2011 steve Update VAC vacuum is back up after ac interruption State condition: Vac Normal,          CC1 ~8e-6 Torr The IFO pressure peaked at       6790   Fri Jun 8 15:24:08 2012 steve Update VAC RGA scan at day 276 and pressure plots                                6894   Fri Jun 29 11:02:00 2012 steve Update VAC the vent is at 500 torr                                6895   Fri Jun 29 13:11:31 2012 steve Update VAC 40m IFO at atm  The 4 hrs vent plot at 3 torr/min rate. Nitrogen was used from 1e-6 torr      6897   Fri Jun 29 22:56:35 2012 Jamie Update VAC input telescope beam clipping on Faraday [Yuta, Koji, Jamie] We went into ITMX chamber to inspect the situation there.  We looked for      6906   Tue Jul 3 17:23:50 2012 steve Update VAC pumpdown completed Vacuum Normal State is reached in 9 hours.  CC1 =  2e-5 Torr Aux dry pump #3 is still running.       6929   Fri Jul 6 09:27:40 2012 steve Update VAC 4 days at atm  I'm looking for some movement indicators of the vent-pump down events.        6930   Fri Jul 6 09:52:35 2012 steve Update VAC pump down hick up  I can not understand what really happened here with CC1 gauge or there was really a pressure glitch.      6970   Thu Jul 12 16:27:04 2012 steve Update VAC drypump changed TP2  dry_pump was changed at intake pressure 982 mTorr at 84,889 hrs  This seal hold up for one year.      7044   Fri Jul 27 14:28:36 2012 steve Update VAC cold cathode gauges Our cold cathode 423 gauges are 10 years old. They get insulated by age and show no ionization      7051   Mon Jul 30 15:49:16 2012 steve Update VAC cc1 switched                                7056   Tue Jul 31 08:01:22 2012 steve Update VAC cc1 switched                                7089   Mon Aug 6 10:53:32 2012 steve Update VAC status: vauum normal    The power outage did not have any effect on the vacuum system.  I      7272   Fri Aug 24 16:03:39 2012 Steve Update VAC Vacuum related work at atm Vacuum related work at atmosphere: Atm1,  Check all chamber dog clamps tightness with torque wrench,      7278   Sun Aug 26 20:58:21 2012 Jenne Update VAC Don't vent!!!! [Koji, Jenne] Steve, do not vent tomorrow morning!  We are still not prepared, and will not finish      7293   Tue Aug 28 09:37:33 2012 Steve Update VAC RGA scan at day 56 RGA scan,  Maglev pumping speed at day 56 CC1 is dying. CC4 is real.      7300   Tue Aug 28 17:59:03 2012 Jenne Update VAC VENT: GO! I have turned of the high voltage supplies for PZT1 and PZT2.  The OMC PZT high voltage supplies were already off, since      7306   Wed Aug 29 11:47:21 2012 ericq Update VAC Venting  [Steve, Eric] I've been helping Steve vent this morning. The following things were done (from      7307   Wed Aug 29 12:46:49 2012 Steve Update VAC Vent completed in 4 hrs        7321   Thu Aug 30 19:08:08 2012 Jenne Update VAC Dogs on BS, ITM chambers checked I tightened as many of the dog clamps on the bottom of the BS, ITMX and ITMY chambers as I could find.  I used a torque wrench      7327   Fri Aug 31 10:24:36 2012 Steve Update VAC chamber dog clamps checked                                7342   Tue Sep 4 20:25:22 2012 jamie Omnistructure VAC better in-air "lite" access connector needed We really need something better to replace the access connector when we're at air.  This tin foil tunnel crap is dumb.       7343   Wed Sep 5 09:50:25 2012 Steve Omnistructure VAC better in-air "lite" access connector needed                                7344   Wed Sep 5 10:50:15 2012 jamie Omnistructure VAC better in-air "lite" access connector needed                                7345   Wed Sep 5 13:11:43 2012 jamie Omnistructure VAC better in-air "lite" access connector needed                                7432   Mon Sep 24 16:59:31 2012 Jenne Update VAC Doors on, ready to pump [The 40m Family] The access connector and all heavy doors are back on.       7434   Mon Sep 24 17:47:05 2012 Steve Update VAC ready to pump   The IFO will be at atmosphere  overnight. The annuloses are pumped down. The access connector jam nuts are tightened      7438   Tue Sep 25 17:21:01 2012 Steve Update VAC pumpdown completed  IFO P1= 1mTorr,   CC1 = 5e-4 Torr.  The IFO is ready for work. Be free to open the shutter and turn on HV      7441   Wed Sep 26 11:03:04 2012 Steve Update VAC pumpdown completed  The new cold cathode gauge CC1 is in place. We were at atmosphere for 28 days ......more later      7454   Mon Oct 1 09:02:17 2012 Steve Update VAC pumpdown reached vacuum normal                                7461   Tue Oct 2 09:13:16 2012 Steve Update VAC RGA scan at day 7                                7491   Fri Oct 5 14:40:55 2012 Steve Update VAC RGA scan after power outage                                7545   Mon Oct 15 08:12:45 2012 Steve Update VAC blank vac monitor VME crate  blew its fuse and the fuse housing is hard to access.      7547   Mon Oct 15 13:07:51 2012 jamie Update VAC vacuum VME crate broken, replaced, minor vacuum mayhem ensues Steve and I managed to access the fuse in the vacuum VME crate, but replacing it did not bring it back up.  We decided      7549   Mon Oct 15 17:08:01 2012 Steve Update VAC vacuum is back with some disabled valves                                7564   Wed Oct 17 08:04:31 2012 Steve Update VAC Roughing pumps on for oil change PR1, PR2 and RP3 turned on for warming up for oil change. Oil changed with 3.2L of  MVT-19      7582   Fri Oct 19 16:45:39 2012 Steve Update VAC vent has started                                7584   Fri Oct 19 19:26:42 2012 Jenne Update VAC vent has started                                7587   Mon Oct 22 09:10:07 2012 Steve Update VAC @750Torr                                7594   Tue Oct 23 08:45:00 2012 Steve Update VAC vent day 3                                7597   Tue Oct 23 16:18:03 2012 Steve Update VAC Roughing pumps on for oil change                                7605   Wed Oct 24 09:15:12 2012 Steve Update VAC vacuum rack 24V ps was current limited                                7669   Mon Nov 5 10:34:48 2012 Steve Update VAC existing vacuum documents                                7696   Mon Nov 12 09:21:10 2012 Steve Update VAC pumpdown has started I'm looking for IOO steering mirror power supplies. I found two so far: one at 1Y3 as Kepco  + 75V and one at OMC_North      7697   Mon Nov 12 16:52:03 2012 Steve Update VAC pumpdown has completed  The pressure is CC1 3e-4 Torr at 8 hours of pumping.  Status: vacuum normal      7703   Tue Nov 13 08:34:11 2012 Steve Summary VAC pumpdown after 24days at atmosphere

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