 Tue Sep 3 14:23:21 2013, Steve, Update, PEM, earthquakes 
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~Vancuver, Canada earthquakes: magnitude 6, 5 and more shaking
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 Wed Nov 14 14:35:38 2018, Steve, Update, ALARM, emergency calling list for 40m Lab
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It is posted at the 40m wiki with Gautam' help. Printed copies posted around doors
also. |
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Mon Sep 20 17:10:10 2010, steve, Configuration, PSL, enclosure beam guides to IFO are installed
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The PSL out 2" OD beam guide tube was cut 1.5" shorter to 13.5"
The 10" OD 0.25" wall Al tube was replaced by a lighter, not anodized and thinner wall 0.094" tube of 15.5"
lenght, that is 0.75" shorter. |
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Thu Apr 6 15:35:44 2017, Steve, Update, PEM, envioirmental noise
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Building: Central Engineering Services
Date: Monday, 04/10/17 |
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Tue Feb 5 09:08:11 2013, Steve, Update, PEM, exterier doors to be painted
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Quote:
The wood exteier walls, gutters and doors were painted at CES-Annex building #69 |
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Tue Feb 11 16:49:36 2014, Steve, Update, PEM, floor cleaning
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Keven, Steve
The floor was cleaned under the east arm tube with hand held wet towel. We moved staff around and mopped. I did at the bottom of rack 1Y1, |
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Tue Feb 18 10:10:07 2014, Steve, Update, PEM, floor cleaning under racks
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Quote:
Keven, Steve |
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Tue Mar 4 17:07:27 2014, Steve, Update, PEM, floor cleaning under racks
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Quote:
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Wed Jun 29 14:32:22 2016, Steve, Update, SUS, how to remove epoxy from optics
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Hi Steve -
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Thu Jun 30 10:03:16 2016, Steve, Update, SUS, how to remove epoxy from optics
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Proposed Acetone soak dish for SOS epoxy softening.
It has good acces through 5" top ID. The set up is stable and teflon lined.
Materials: glass jar with SS cover, teflon bricks, 0.008" teflon wrapped "high density Drever bricks" and aluminum |
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Tue Jul 5 09:25:31 2016, Steve, Update, SUS, how to remove epoxy from optics
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Glass soaking dish with teflon guides.
Quote:
Proposed Acetone soak |
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Wed Oct 20 16:41:41 2010, steve, Omnistructure, General, laser chiller leaving for MIT
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Mon Jul 26 08:51:31 2010, steve, Update, PEM, lowering AC setpoint by 2F makes PSL happy
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Quote:
The control room temp is warmer than usual. The heat exchanger Office Pro 18 set point was lowered from 70 to 68F |
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Wed Sep 1 10:54:15 2010, steve, Update, PEM, more crane balancing
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| Crane balancing at the south end is continuing today. |
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Wed Jul 10 14:49:00 2013, Steve, Update, Green Locking, more fiber protective tubing layed
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Quote:
Craig, Gautam and Steve, |
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Fri Aug 13 18:32:48 2010, steve, Update, PEM, new legs attached to optical table
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Koji, Rana and Steve
The floor preparation continued today. The really messy part of drilling and jack-hammering the concrete were done in controlled manner. |
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Fri Sep 19 11:48:14 2008, steve, Update, Computers, old hubs can make one happy
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Joseph finds a XIX century bottle neck hub: CentreCOM 3624TR 10Base-T
and happily replaces it with Netgear GS724T 1000Base-T |
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Thu Feb 23 10:53:54 2012, steve, Update, SUS, oplev PIT transfer functions
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Oplev transfer functions PIT UGF were optimized to be at 2-3 Hz with 60 degree minimum phase margin by adjuting oplev gains.
Additional Notes by KI:
The PRM oplev has a tailored 3.3 Hz resonant gain in order to calm down a wobble during the |
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Mon Feb 27 14:35:22 2012, steve, Update, SUS, oplev YAW transfer functions
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The BS and the PRM have 3.3 Hz resonant gain filters that kill the phase margins.
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Wed May 14 10:04:06 2014, Steve, Summary, SUS, oplev laser and temperature
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ETMX oplev qpd gain has to be increased.
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Fri Oct 18 15:18:49 2013, Steve, Update, PEM, particle count peak or ...
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| Sunday evening fireworks. Manasa heard it. |
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Wed Nov 13 11:30:07 2013, Steve, Update, PEM, particle counter MOVED
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| Particle counter moved from the top of IOOC to the east wall |
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Tue Oct 23 09:37:33 2012, Steve, Update, SUS, passive TT adjustment correction
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Quote:
Tip Tilt pitch adjustment on existing-in vacuum suspension. This can be added by a simple installation of a 1.25" long 2-56 threaded |
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Wed Jan 6 10:58:03 2016, Steve, Update, General, projector light bulb is out
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Projector light bulb ordered
Quote:
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Thu Nov 3 12:40:10 2016, gautam, Update, General, projector light bulb is out
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The projector failed just now with a pretty loud 'pop' sound - I've never been present when the lamp goes out, so I don't know if this
is usual. I have left the power cable unplugged for now...
Replacement is ordered Nov 4 |
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Fri Nov 18 15:10:06 2016, Steve, Update, General, projector shipped out for repair
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Vivitek D952HD sn2160130 was send out for warranty repair. It's hard to believe that it has a 5 year warranty...... RMA - WR16004483.....expected
to be back by Friday, Dec 2
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Wed May 21 09:35:33 2014, Steve, Update, SUS, razor beam dumps ETMX_ISCT
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Quote:
Anodized aluminum dumps replaced by 6 razor beam dumps. |
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Mon Sep 24 17:47:05 2012, Steve, Update, VAC, ready to pump
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The IFO will be at atmosphere overnight. The annuloses are pumped down. The access connector jam nuts are tightened to 45 ft/lbs
Actual pumpdown will start
tomorrow morning. |
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Tue Sep 18 14:02:37 2018, Steve, Update, safety, safety training
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Yuki Miyazaki received 40m specific basic safety training.
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Thu Feb 24 16:47:26 2011, steve, Configuration, PSL, shutter is back on the PSL output
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Uniblitz mechanical shutter was placed into the beam path of the PSL output with razor beam trap. The output power was 1.39W at 2.08A
It is working from the MEDM screen "old map" C1IOO_Mech_Shutter.adl |
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Fri Nov 16 10:26:12 2018, Steve, Update, VAC, single viton O-rings
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The 40m vacuum envelope has one large single O-ring on the OOC west side. All other doors have double O-ring with annuloses.
There are 3 spacers to protect o-ring. They should not be removed!
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Tue Mar 23 10:11:13 2010, steve, Update, PEM, small air cond unit failed yesterday
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| Old control room air condition failed yesterday around noon. It was blowing 80-85F hot air for about 2-3 hours at racks 1Y4-7 and the entry room 103 |
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Tue Oct 22 10:12:33 2013, Steve, Update, PEM, south arm AC intake duct checked
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The 4th week of no wet mopping of the floor and no wet wiping the vacuum envelope.
We cleaned the intakes of the south arm IFO air condition. The bottom duct have quite a bit accumulation Atm1 |
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Tue Mar 26 16:36:24 2013, Steve, Update, 40m Upgrading, table leveling mounts go here
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Quote:
Steve's suggestion for how to level the end table using "swivel leveling mounts": |
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Fri Mar 29 16:30:27 2013, Steve, Update, 40m Upgrading, table leveling mounts go here
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Quote:
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Tue Jan 28 16:26:40 2014, Steve, Update, VAC, vacuum computers are back without safety
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Quote:
[Steve Koji] |
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Wed Feb 5 08:14:59 2014, Steve, Update, VAC, vacuum computers are back without safety
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Quote:
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Tue Jun 21 14:12:10 2016, Steve, Update, PEM, vacuum envelope wiped
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I wiped down the cranes with wet towel and Mario our janitor did the chamber tops with the tubes.
The optical tabels were not touched.
The outside temp peaked at 44 C yesterday |
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Thu Jan 2 10:50:24 2014, Steve, Update, VAC, vacuum monitor is still blank
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The date is correct on this monitor.
Last stored RGA scan data Dec 20, 2013
IFO pressure at CC1 5.8e-6 Torr |
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Thu Jan 2 13:35:06 2014, Koji, Update, VAC, vacuum monitor is still blank
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| We probably need to restart the machine, but I didn't want to touch c1vac1 and c1vac2. |
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Tue Jan 28 11:13:50 2014, Koji, Update, VAC, vacuum monitor is still blank
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[Steve Koji]
We pushed the reset button of c1vac1 and c1vac2 and the vacuum screen is back.
First, we pushed the reset button of c1vac1 and pushed the one on c1vac2. |
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Fri Oct 16 18:27:52 2015, Steve, Update, VAC, vacuum normal condition
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Vacuum normal configuration with VM1-closed, VM2-open valve positions. Power load normal 24V 0.2A
Maglev rotation 560 Hz at room temp body temp.
"NO COMM" error message on medm screen. Gauge controller pressures are read able. |
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Thu Jun 28 08:09:51 2018, Steve, Update, CDS, vacuum pneumatic N2 pressure
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The fardest I can go back on channel C1: Vac_N2pres is 320 days
C1:Vac-CC1_Hornet Presuure gauge started logging Feb. 23, 2018
Did you update the " low N2 message" email addresses? |
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Thu Jun 28 10:28:27 2018, rana, Update, CDS, vacuum pneumatic N2 pressure
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we disabled logging the N2 Pressure to a text file, since it was filling up disk space. Now it just sends an email to our 40m mailing list, so we'll
all get a warning.
The crontab uses the 'bash' version of output redirection '2>&1', which redirects stdout and stderr, but probably we just |
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Wed Apr 8 09:36:20 2009, steve, Configuration, VAC, valve condition changed to BG to calibrate the RGA
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Vacuum normal valve condition was changed to accommodate SRS-RGA calibration.
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Thu Dec 5 11:06:43 2013, Steve, Update, Cameras, viewport video ccd cameras are all covered
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Quote:
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Thu Jun 19 17:28:19 2014, Steve, Update, PSL, window device is ready for test
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The window is at the north west corner of the PSL enclosure.
The 1 mm thick BK7 window is AR coated both side R <0.08%, W2-PW1-1004-1064-0
The PZT stack is 0.75" OD, 0.25" thick with ~ 6 mm ID, motion |
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Thu Jul 28 08:42:36 2016, Steve, Update, SUS, wire clamp
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The clamp is in the machine for milling off the grooves. It's condition is normal. The edges needs some 800 sand paper so it is not sharp anywhere.
How did those nicks get on the edge? Fortunatelly they did not aligned with the wire.
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Wed Jun 1 15:01:56 2016, Steve, Update, SUS, wire standoffs update
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There are some issues with 5 mm sapphire prism Atm5. It will cause interference between one of the prisms and the Side OSEM.
Here are some drawings to see the issues with larger wire standoff.
The 2 mm prism will work.with a 1 mm longer dumbell. |
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Thu Jun 2 16:35:44 2016, Koji, Update, SUS, wire standoffs update
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Gap of the prism from the mirror
Sag: s = R(1-Cos[ArcSin[d/2/R]])
- Mirror curvature sag for 2mm prism (R=37.75mm): s=13um |