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ID Date Author Type Categoryup Subject Text Attachments
  389   Fri Mar 21 11:54:38 2008 robUpdateVACtp 2 failed[quote]Small turbo #2 is the forepump of the
maglev.
It failed last night, shut down the  maglev
  
  423   Thu Apr 17 15:00:59 2008 steveUpdateVACvac controller computer to be replacedNow that Rosalba is up and running someone
should step forward to volunteer for this
job.
  
  465   Mon May 5 15:53:14 2008 steveUpdateVACdrypump replaced & readbacks are outThe small turbo pump of the annulus system
is tp3
It's drypump was replaced at 1.4 Torr after
  
  790   Mon Aug 4 12:12:20 2008 steveConfigurationVACthe ifo is at atmThe 40m vac envelope was vented this morning.
P1 is at 760 Torr
 vent3h.jpgUntitled.png 
  843   Fri Aug 15 19:32:49 2008 steveConfigurationVACpumpdown completeI have just reached vacuum normal. The maglev
peaked at 49.8C body temp with aux fan on
at 3.2 Torr
 pdprm.jpg 
  845   Mon Aug 18 09:19:55 2008 steveSummaryVAC11 days at atmIt took 11 days to fix earth quake triggered
sus problems of ITMX, SRM and PRM
Only ITMX north and BSC north vac doors were
 ventprm.jpg 
  887   Tue Aug 26 15:06:16 2008 steveConfigurationVACrga scanPumpdown 66 PRM-maglev vac normal -day 11
short form: pd66PRM-m-d11
 RGA-0808260125.png 
  1071   Thu Oct 23 11:26:25 2008 steveBureaucracyVACoptosigma forks for vacuumNine short forks from OptoSigma were cleaned,
baked and measured by Bob T.
They passed the LIGO vac compatiblity test
  
  1085   Fri Oct 24 15:05:13 2008 steveUpdateVACrga is out of orderThe old Dycor  RGA is out of order.
I'm getting ready to purchase an SRS instrument.
  
  1134   Fri Nov 14 11:33:19 2008 steveUpdateVACSRS-RGA installedOld Dycor rga is removed and new SRS-RGA200
installed.
It is pumped down and ready for hooking up
  
  1186   Mon Dec 8 11:41:27 2008 YoichiSummaryVACThe rough pump for the TP2 replacedBob, Yoichi

The foreline pressure of the TP2 (the foreline
  
  1212   Thu Jan 1 01:15:45 2009 YoichiSummaryVACN2 line leak ?I've been replacing the N2 bottles recently.
I noticed that the consumption is too high.
I had to replace them every two days.
  
  1220   Fri Jan 9 16:52:18 2009 steveUpdateVACtp3 forline pump replacedAlberto took 40m vacuum 101 class as we replaced
the drypump at the annulus pump line.
  
  1226   Wed Jan 14 09:22:43 2009 steveHowToVACN2 supply pressure lowered for vac valves[quote]I've been replacing the N2 bottles
recently.
I noticed that the consumption is too high.
 n280d.jpg 
  1227   Wed Jan 14 10:59:06 2009 steveBureaucracyVACrga waiting to be "connected"We have no RGA data since old Dycor passed
away in the middle of Oct, 2008
New SRS-RGA200 was installed on the vac envelope
  
  1253   Mon Jan 26 14:51:54 2009 josephbConfigurationVAC We need a new RS-232 to Ethernet bridge in
order to interface properly with the new
RGA.  The RGA has a fixed baud rate of 28.8k,
  
  1448   Wed Apr 1 10:22:13 2009 steveUpdateVACRGA logging is workingThanks to Joe B who made the SRS RGA working
with linux
Last data file logged at 2008 Oct
 rga-090401.png 
  1452   Fri Apr 3 10:01:50 2009 steveUpdateVACrgascan with temp plotRga scan of day 231 since pumpdown pd66-m-d231
m stands for maglev pumping speed,
vacuum normal condition of valves,
 pd66tempow.jpgrga-090403scan.png 
  1459   Wed Apr 8 09:36:20 2009 steveConfigurationVAC valve condition changed to BG to calibrate the RGAVacuum
normal valve condition was changed to accommodate
SRS-RGA calibration.
  
  1462   Thu Apr 9 11:27:19 2009 steveUpdateVACvac gauge reading problemCold cathode gauge CC4  is reading
normal.
CC1 is glitching, it is probably
 vacgflsec.jpgvacgflmin.jpg 
  1486   Wed Apr 15 11:25:21 2009 steveConfigurationVAC RGA cal completed

    
        
 rga-090415-bg-d7-cald2.png 
  1505   Mon Apr 20 23:27:59 2009 ranaSummaryVACc1vac2 rebooted: non-functional for several monthsWe found several problems with the framebuilder
tonight. The first symptom was that it was
totally out of
  
  1506   Tue Apr 21 18:18:27 2009 steveUpdateVACmaglev failedOur Osaka TG360MB maglev failed with CSB
error message. This means that the dry emergency
landing bearing has to be replaced.
 nopumping10h.jpg 
  1507   Wed Apr 22 11:16:26 2009 steveConfigurationVACCryo pump is ON and the Maglev is deadThe
CRYO pump cooled down and VC1 was opened.
This
 cryoOn.jpg 
  1511   Thu Apr 23 16:38:33 2009 steveUpdateVACvac valve relay box is shortingBen and I found this vacuum valve relay
box intermittently shorthing yesterday.
It effects V4, V5, VA6 and VM1........
 vacrel.png 
  1517   Fri Apr 24 16:02:31 2009 steveHowToVACcryo pump interlock ruleI tested the cryopump interlock today.
It is touchy. I do not have full confidence
in it.
 cryo.png 
  1518   Fri Apr 24 16:24:25 2009 robOmnistructureVACPaschenIn response to Steve's elog entry, and
for 40m posterity, I provide the Paschen
Curve.
 paschens.pngpaschenplot.m 
  1520   Sat Apr 25 00:45:31 2009 YoichiConfigurationVACReflector for the cryopump temperature monitor changedThe temperature of the cryopump head is monitored
by a photo switch looking at an aluminum
foil reflector attached to the needle of
  
  1521   Sat Apr 25 02:54:25 2009 YoichiConfigurationVACReflector for the cryopump temperature monitor changed[quote]The temperature of the cryopump head
is monitored by a photo switch looking at
an aluminum foil reflector attached to the
  
  1524   Mon Apr 27 18:31:44 2009 steveConfigurationVACVC1 closedCC1 5e-7 Torr,  VC1 closed at 18:25, 
IFO is not pumped, RGA is in bg-mode
 
  
  1525   Tue Apr 28 01:48:45 2009 peteConfigurationVACVC1 openAt about 1am or so Yoichi and I opened
VC1.  CC1 had fallen to about 5e-5 torr.
  
  1527   Tue Apr 28 09:27:32 2009 steveConfigurationVACcryopump deserves some creditCongratulation Yoichi and Peter for full
rf locking at night. Let's remember that
the cryopump was shaking the hole vac envelope
 cryfl.jpgseiscryofl.jpg 
  1532   Wed Apr 29 10:20:14 2009 steveHowToVACcryo pump interlock rule is waved


   
        
            
  
  1552   Wed May 6 19:04:11 2009 ranaSummaryVACvac imagesSince there's no documentation on this besides
Steve's paper notebooks...
 vacrack.pdf 
  1553   Thu May 7 10:28:20 2009 steveUpdateVACretrofitted maglev's needs 
 Our spare Osaka maglev purchased
in Oct 2005 turned out to be having a viton
  
  1572   Sun May 10 13:41:17 2009 steveUpdateVACETMY damping restored, VC1 openedETMY damping restored.
Cryo  interlock closed VC1 ~2
days ago. P1 is 6.3 mTorr. Cryo temp 12K
  
  1593   Sun May 17 14:35:52 2009 YoichiUpdateVACVC1 openedI found the VC1 was closed and the pressure
was 4.5e-3 torr.
I tweaked the optical sensor (cryopump temperature),
  
  1601   Mon May 18 19:44:52 2009 rana, steveConfigurationVACCryo Pump turned off and valved off: 1 beer can onlyI was seeing some excess noise in the ETMY
oplev yaw and so we turned off the cryo and
restarted c1vac2 to get the turbo pump channels
  
  1602   Mon May 18 20:16:20 2009 ranaConfigurationVACnot itThere was essentially no change in the ETMY
oplev spectrum with the cryo off!
 a.png 
  1604   Tue May 19 09:34:29 2009 steveConfigurationVACIFO is not pumped & CRYO is being regeneratedMorning Vacuum condition: IFO is not being
pumped, P1 pressure is 1.8 mTorr and rising
(see P1 pressure plot of 100 min ).
 cryoreg.jpgcryo30d.jpg 
  1609   Tue May 19 16:18:45 2009 steveConfigurationVACIFO pressure is 4.2e-7 Torr with CRYO pump[quote]Morning Vacuum condition: IFO is not
being pumped, P1 pressure is 1.8 mTorr and
rising (see P1 pressure plot of 100 min ).
  
  1610   Wed May 20 01:41:19 2009 peteUpdateVACcryopump probably not itI found some neat signal analysis software
for my mac (http://www.faberacoustical.com/products/),
and took a spectrum of the ambient noise
  
  1671   Fri Jun 12 09:56:38 2009 steveConfigurationVACnew maglev installedJoe and Steve
 
The retrofitted Osaka 390 was installed
 m390pd.jpg 
  1672   Fri Jun 12 15:34:49 2009 steveConfigurationVACmaglev is running


   
        
            
  
  1673   Mon Jun 15 15:17:33 2009 josephb, SteveConfigurationVACVacuum control and monitor screensWe updated the vacuum control and monitor
screens  (C0VAC_MONITOR.adl and C0VAC_CONTROL.adl). 
We also updated the /cvs/cds/caltech/target/c1vac1/Vac.db
  
  1674   Mon Jun 15 16:31:36 2009 steveConfigurationVACRGA is scanning new Maglev


   
        
            
  
  1677   Tue Jun 16 09:02:30 2009 steveConfigurationVACnew maglev RGA scanThe maglev fore line pressure is 3e-6 torr
at CC2 after 4 days of pumping. Varian turbo
V-70 is pumping on it through V4 and VM2
 nmagd4scan.jpgnmagd4.jpg 
  1690   Tue Jun 23 10:06:03 2009 steveUpdateVACnew maglev RGA scan at day6The Maglev is running for 10 days with
V1 closed.  The pressure at the RGA-region
is  at 2e-9 torr on CC4 cold cathode
 newmagscand6.jpgnmagpresd10.jpg 
  1691   Tue Jun 23 15:19:42 2009 steveConfigurationVACV1 is open


   
        
            
 V1_opennmag.jpg 
  1693   Wed Jun 24 09:21:19 2009 steveConfigurationVACIFO RGA scan with Maglev & Cryo


   
        
            
 nmagd1ifo.jpgnmagCryopres.jpg 
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