 Tue Aug 7 16:11:23 2012, steve, Update, SUS, optical table box wall proposal 
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Sanwiched wall as shown: 1" clear acrylic, 2 layers of 0.004" thick "window tint", 1 layer of 0.007" thermashield
and 0.125" yellow acrylic
Visibility: 70 %, Transmission of 1064 nm 2-3 % at 0-50 degrees incident power density 0.7 W/mm2 |
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Sun Aug 12 01:21:26 2012, steve, Update, SAFETY, exit door left unlocked
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Caltech security called me at 1am Sunday. Control room emergency exit door was
found unlocked!
It is your responsibility to lock door if you unlocked it ! |
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Mon Aug 13 15:31:09 2012, steve, Update, General, larger optical tables at the ends
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I'm proposing larger optical tables at the ends to avoid the existing overcrowding. This
would allow the initial pointing and optical level beams to set up correctly.
The existing table is 4 x 2 would be replaced by 4' x 3' We would lose only ~3" space toward exist door. |
 Wed Aug 15 16:01:47 2012, steve, Update, General, larger optical tables at the ends ?
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The drawing of the 4' x 2' table cover can be seen at entry #6190 The new proposed
wall #7106 The yellow acrylic would be ~ 0.25" thick and it will be the inside. It
is not shown on the drawing. |
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Wed Aug 22 11:41:20 2012, steve, Update, General, grout plate for optical table at the ends
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Reinforced concrete grout plate for existing carbon steel stands at the ends.
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Mon Oct 1 17:03:01 2012, steve, Update, SUS, ETMY oplev relayed
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Quote:
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Fri Oct 12 16:59:26 2012, steve, Update, SUS, TT PITCH damping
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Quote:
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Mon Oct 15 08:08:33 2012, steve, Update, SUS, PRM damping restored
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Quote:
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Thu Nov 1 08:48:42 2012, steve, Update, Alignment, progress, then setback - trend of BS table shift
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Quote:
But these jumps in the OSEMs are all at the level of 10-20 microns. Seems like that wouldn't be enough to account for anything; |
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Fri Dec 14 09:05:04 2012, steve, Update, PEM, TT after eq 6.1
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SRM, ITMY and MC3 moved some what, but how are the TT? It may worth looking at them before we vent. |
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Wed Mar 6 11:33:09 2013, steve, Update, SAFETY, safety audit 2013
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Recommended correction list: |
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Wed Mar 13 16:04:24 2013, steve, Update, SAFETY, laser safety glasses checked
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All safety glasses were cleaned in soapy water by Bob. I measured their transmission at 1064 nm, 150 mW, beam diameter 1.5 mm They
are in working order, no transmission.
Inventory: |
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Tue Mar 19 10:30:00 2013, steve, Update, SAFETY, crane inspection 2013
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Professional crane inspector: Fred Goodbar found two small leaks at the Vertex trolley as he was conducting the annual inspection of the 40m cranes.
Otherwise the cranes are in safe condition. |
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Fri May 31 10:25:17 2013, steve, Update, safety, first aid kits refilled
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Quote:
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Thu Jun 6 16:33:19 2013, steve, Update, safety, updated laser inventory
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Updated laser inventory and operator list. They are posted in the 40m wiki and entry doors of the 40m IFO room.
Let me know if this list needs correction.
Lightwave M126N-1064-700 NPRO sn 337 in the PSL enclosure got connected to local emergency shut off switch. This is a LIGO operational safety |
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Fri Aug 30 08:08:29 2013, steve, Update, safety, fire horns-flashers tested OK
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We had fire alarm tests and evacuation drills at 1:30pm yesterday. All flashers and horns are functioning unbearably loud and bright
including clean assembly room. |
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Wed Feb 19 08:07:01 2014, steve, Update, safety, annual laser safety glasses check
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All 40m laser safety glasses are cleaned and measured this morning. Bring
your own safety glasses if you have to enter the 40m IFO room. |
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Tue Feb 25 16:54:57 2014, steve, Update, safety, safety audit 2014
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We had our annual safety inspection today. Our SOPs are outdated. The full list of needed
correction will be posted tomorrow. |
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Thu Feb 27 13:11:13 2014, steve, Update, safety, safety audit correction
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Quote:
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Thu Mar 6 11:43:17 2014, steve, Update, General, Guralp control unit
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CMG-40T handheld controller unit is missing its power supply. In order to zero the instrument one has to apply plus and minus DC voltage.
The wiring on this 10 pin Amphenol PT02E-12-10P is shown. |
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Fri Mar 7 16:56:17 2014, steve, Update, IOO, IOO qpds centered
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Quote:
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Mon Mar 10 09:28:48 2014, steve, Update, IOO, IOO pointing 2 days
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Morning seconds without adjustment.
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Thu Mar 13 16:05:48 2014, steve, Update, safety, safety audit 2014
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Quote:
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Mon Mar 17 10:50:58 2014, steve, Update, safety, 2014 annual crane certification
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Quote:
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Fri Mar 21 14:59:44 2014, steve, Update, PEM, controling dust
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Please take a look at the table top with the flashlight before
removing it. If it is dusty, wipe it down with dry lint free cloth in the box.
There is one box with flash light and wiper at AP, ETMY & ETMX optical tables. |
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Mon Mar 24 22:13:37 2014, steve, Update, General, Power Failure
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Quote:
I'm checking the status from home. |
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Tue Mar 25 14:52:57 2014, steve, Update, VAC, vacuum is recovered
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Out gassing plus leak rate 0.15 mTorr / hour
The pressure rose to 2.5 mTorr in 17 hours
V1 was opened at 1:56pm |
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Fri Mar 28 16:26:20 2014, steve, Update, VAC, RGA scan after power failure
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Quote:
Out gassing plus leak rate 0.15 mTorr / hour |
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Fri Apr 11 14:57:53 2014, steve, Update, LSC, congratulation
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Mon Apr 28 17:27:29 2014, steve, Update, safety, safety audit 2014
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Quote:
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Tue Apr 29 00:11:03 2014, steve, Update, safety, safety audit 2014
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Be aware that this may affect POP QPD and POP RF Thorlabs PD
Quote:
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Thu May 1 17:14:36 2014, steve, Update, PSL, thin window AR measured
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CVI broadband AR coating was measured at the PSL-enclosure table around 9-10am today. The 2W Innolight first PBS S polarization beam was used with
an other 1/2 wave plate and PBS.
W2-PW1-1004-C-633-1064-0 This 0.045" thick window has 0.7- 0.8 % reflected beam on each sides at 5 degrees of incidence, P polarization. |
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Fri May 2 08:15:54 2014, steve, Update, safety, safety audit 2014
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Late adition: CHECK all viewport covers.
A, transparent Lexan sheet is protecting glass windows in a horizontal position |
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Fri May 2 10:38:29 2014, steve, Update, PSL, thin window AR measured
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Quote:
CVI broadband AR coating was measured at the PSL-enclosure table around 9-10am today. The 2W Innolight first PBS S polarization beam |
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Tue May 6 09:46:50 2014, steve, Update, PEM, cleaning day
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Keven and Steve,
We cleaned around the Vertex chambers, PSL and MC2 floor areas.
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Tue May 6 10:22:28 2014, steve, Update, CDS, c1ioo dolphin fiber
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Quote:
Steve and I nicely routed the dolphin fiber from c1ioo in the 1X2 rack to the dolphin switch in the 1X4 rack. I shutdown c1ioo before |
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Tue May 6 18:32:14 2014, steve, Update, LSC, TRY 60Hz noise hunt
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This is an effort to get rid of our ground loops by isolating the electronic components from the optical table.
Aluminum mounting base plates of Thorlabs BA2 and Newport B-2 were replaced by plates or post made out of delrin |
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Wed May 7 14:01:36 2014, steve, Update, LSC, TRY 60Hz noise hunt
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Quote:
This is an effort to get rid of our ground loops |
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Thu May 8 17:25:17 2014, steve, Update, LSC, TRY 60Hz noise hunt
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| I worked at the ETMY-ISCT this morning and late afternoon. I will continue the 60 Hz noise hunt tomorrow. |
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Fri May 9 11:23:11 2014, steve, Update, Green Locking, decreased X green light power
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| Green light power decreased from 3 mW to 1 mW at the ETMX-ISCT shutter. More later. |
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Mon May 12 14:42:25 2014, steve, Update, endtable upgrade, optical table enclosure wall proposal and table at ETMY
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Quote:
Sanwiched wall as shown: 1" clear acrylic, 2 layers of 0.004" thick "window tint", 1 layer of 0.007" |
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Fri May 16 16:08:12 2014, steve, Update, LSC, Isolating base plates
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Electronic components should be ISOLATED as they are installed on the optical tables.
This is essential to avoid ground loops, 60 Hz and harmonic peaks in the spectrum. We have just got some made.
Please only use it for this reason. Earlier black delrin base plates were used up in not needed places. |
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Mon Jun 9 09:41:06 2014, steve, Update, safety, safety training
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| 2014 surf students Nichin and Akhil received 40m specific basic safety training last week. |
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Thu Jun 19 10:39:22 2014, steve, Update, safety, surf safety training
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Andres Medina and Andrew "Harry" Hall received 40m specific safety training. They did general safety already and their laser safety
training will be this after noon. |
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Thu Jun 19 14:12:45 2014, steve, Update, safety, optical table scans
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PSL, AP, ETMY and ETMX optical tables were scanned for stay beam. |
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Thu Jun 19 17:11:52 2014, steve, Update, PEM, it is warmer today
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| The PSL HEPA was running at 30VAC-variac. It is 1 degree C warmer than usual. The HEPA fan motor turned up to 60 V |
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Fri Jun 20 14:42:57 2014, steve, Update, SUS, vac illuminators turned off
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Mon Jul 7 08:13:41 2014, steve, Update, General, yes,there was firework
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Fri Aug 8 11:22:35 2014, steve, Summary, SUS, oplev laser summary
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2005
ALL oplev servos use Coherent DIODE LASERS # 31-0425-000, 670 nm, 1 mW |
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Mon Aug 11 10:23:39 2014, steve, Summary, SUS, oplev laser summary updated
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Quote:
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