SOS optics prepared to be hanged are moved from the South Flow Bench to S15 Clean Cabinet.

SRMU 03 (1-25-2010) specification summery E080460-05-D,  older vintage SRM 01 and PRM 02 (need more specification)

There was one  NOT MARKED SOS with two broken magnets on its face. This is labeled ???

This was done to prepare clean space for TIP-TILT drive- test set up.

The existing cable from 1X5 can reach only to the south end:  from whitening filter to satelite amp.  This will be good for future test of suspensions.

We need to make new cable from 1 X 1 to the south end = 40m long

 Earthquake test our suspensions            PRM damping restored.             Oplev servo gains turned to zero.

 The power outage did not have any effect on the vacuum system.  I had to open VM1 to the RGA because of flaky CC1 cold cathode gauge fluctuations.

We are running on the vertically positioned CC1 again.

Note: rga scans with closed VM1 are back ground scans.

The SRM oplev beam is clipping.

 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

Max power 100 mW

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 !

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.

I'm working on the new ACRYLIC TABLE COVER for each end that will cost around $4k ea.  The new cover should fit the larger table.

Let me know what you think.

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.

Question remaining: should get a larger table 4' x 3' as outlined by red lines and make new cover to fit this

The oplev beam path needs larger incident angle to get in and out of the chamber: REMOVE BOTTLENECK for easy traffic

Moving the existing table closer to ETMY chamber - as Jamie suggested-  would help but there is no room for this solution.

The larger table solve this issue and leave more room for initial pointing, arm transmitted and future experiments.

Other benefits: no tube to make between table and chamber. It is easier to make the the larger box air tight.

The new isolation box with feed through, cover, seals will cost $4-5K ea

Reinforced concrete grout plate for existing carbon steel stands at the ends.

 I did relayed the oplev path with new  f 500 mm lens

      I  was wrong The instability will be the same when the coils are actuated.

 The PRM damping restored. Oplev  PIT gain  0.15 and YAW  gain   -0.3 turned to zero.

 BS table and suspensions are fine.

 SRM, ITMY and MC3 moved some what, but how are the TT? It may worth looking at them before we vent.

                                                 Recommended correction list:

1,  refill- upgrade first aid boxes

2,  maintain 18" ceiling to bookshelf clearance so the ceiling fire sprinklers are not blocked: room 101

3,  label chilled water supply & return valves in IFO room

4,  calibrate bake room hoods annually

5,  update safety sign at fenced storage

              40m still to do list:

1,   clean and measure all safety glasses

2,   annual crane inspection is scheduled for 8am March 19, 1013

3,   make PSL encloser shelf earthquake proof

Do you see something that is not safe? Add it to this list please.

 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:

10 pieces of KG-5, fit over, from Laser Safety

 4 pieces of KG-5, std size, from Drever Lab, best visibility

 1 piece of KG-5 coated for visible, std size, from Kentek

15 pieces of green-plastic LOTG-YAG, fit over, from UVEX

 7 pieces of green-plastic B-D+S 137, std areo fit, from Sperian

 3 pieces of green-plastic, old Thorlab, fit over

 2 pieces of green-plastic, fit over, from Laservision

 8 pieces of braun- plastic, fit over, for green & IR protection, from UVEX & Thorlabs

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.

Restocked First Aid Kits Location:

Main entrance, room 100

Drill press - above N2 cylinders, room 103

Control room, next to fire extinguisher, room  102

Vertex-north wall, IFO room 104

ETMY - right on ends light switches, IFO room 104_ east end

ETMX - on vertical I-beam of crane, IFO room 104_south end

Behind 1X3 Rack, on south wall - under instrument breakers panel PC-1, IFO room 104

Last thing remaining to be fixed from 2013 Safety Audit:

replace book shelf with 83" height

 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 requirement.

 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.

 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.

Glasses were washed in 1% Liquinox water solution and  their transmission measured at  165 mW,  2 mm OD beam of 1064 nm

 We had our annual safety inspection today.  Our SOPs are outdated. The full list of needed correction will be posted tomorrow.

The most useful found was that the ITMX-ISCT ac power is coming  from 1Y1 rack. This should actually go to 1Y2 LSC rack ?

 Please test this so we do not create more ground loops.

 Linus-1, Nodus and others  ac cords can be moved over to new blank yellow extension cord with multiple recepticals.

 Remove two red extension cords going to Smart UPS

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.

 Morning seconds without adjustment.

 Annual crane inspection is scheduled for 8-11am Monday, March 17, 2014

The control room Smart UPS has two red extension cords that has to be removed: Nodus and Linux1

 KroneCrane Fred inspected and certified the 3 40m cranes for 2014. The vertex crane crane was load tested at fully extended position.

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.

 9:11pm closed PSL shutter, turned Innolight 2W laser on,

         turned 3 IFO air cond on,

        CC1 5.1e-5 torr, V1 is closed, Maglev has failed, valve configuration is " Vacuum Normal "  with V1 & VM1 closed, RGA not running,   c1vac1 and c1vac2   were saved by UPS,

        (Maglev is not connected to the UPS because it is running on 220V)

        reset & started Maglev.........I can not open V1 without the 40mars running...........

        Rossa is the only computer running in the control room,

        Nodus and Linux1 was saved by UPS,

        turned on IR lasers at the ends, green shutters are closed

It is safe to leave the lab as is.

 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

 VM2 opened at 2:10 so the RGA region is back to 1e-5 torr

 Last long extension cord removed from 1Y1 to ITMX-ISCT

The AC power strip at ITMX-ISCT is coming from wall L#26

Be aware that this may affect POP QPD and POP RF Thorlabs PD

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.

The specification is  R avg <0.5 % per surface at 0 degree

Rana wants The device would be useless with such a high R, but R 0.1% is OK so I will get V coating.

 Late adition: CHECK all viewport covers.

A, transparent Lexan sheet is protecting glass windows in a horizontal position

B, metal housing protection is required on each viewport except signal ports

C, signal ports should be shielded by optical table enclosure

We have to cover this window-camera with implosion proof cover or just remove it and blank it.

Question number 2: Do our vertically positioned windows with flip able covers require protective lexan ? NO 5-5-2014

 CVI V-AR coating at 1064 nm, 0 degree,  catalog item is R< 0.25% on each sides,

 R <0.1 % is custom at much higher prices.

This custom order should go with other  orders that has similar need.

From CVI: 5-6-2014

I checked the trace info on the W2-PW1-1004-C-633-1064-0, BBAR coated window that you received.  It is side 1, 0.42%R & side 2, 0.53%R @ 1064nm.  And with the shift, I’m not too surprised you ended up with 0.7%.  A V coat would start with <0.25% (and more typically coming in at ~0.1%) per surface.  As far as stock options, I have a 1”dia x 4mmT, fused silica window that is recorded as side 1, R=0.09 and Side 2, R=0.08% @ 1064.  Is this too think or will it work for you?

 Keven and Steve,

We cleaned around the Vertex chambers, PSL and MC2 floor areas.

 I put label  at the dolphin fiber end at 1X2 today.   After this I had to reset it, but it failed.

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 material.

This is an insulator. DELRIN base plates were installed 6 places. The oplev-qpd has Nylon base plate.

The NPRO and HE/NE lasers are not isolated from the table. S8 and S9

I'm not sure about the doubling oven S10 

The optical table is grounded at G11  through  ~1 Mohms to the ETMY chamber.

Alignment touch up needed   at all D-marked component!

 Attachment appendix:

D: component delrin isolated

N: component nylon isolated ( or Delrin )

S: component shell is shorting to optical table (except oven)

G:  optical table ground

I failed to maximize TRY the pds.

 I worked at the ETMY-ISCT this morning and late afternoon.  I will continue the 60 Hz noise hunt tomorrow. 

Green light power decreased from 3 mW to 1 mW at the ETMX-ISCT shutter. More later.

More details about this east end  " acrylic + "   enclosure ( optical table cover ) can be found elog entry 6210, 7194 and  7106

Window tinted layer transmission plot is below.

We have a film which may meet your requirements and the values are shown below:

               Wavelength (nm)              Transmission                     Reflectance(front)            Reflectance (back)

                        1060                               .0772                               .604                                     .759

                        1070                               .0723                               .615                                     .772

These values are taken from the LBNL Optics 6 program and if you have access to that program, the NFRC ID for the film is 202.   If you do not have access to the program, I have a captured the graph which may be of some help.  I apologize for the appearance of the graph but someone at LBNL decided it would look better with a dark gray background – the yellow is the transmission curve, the blue is the reflectance (front) and the green is the reflectance (back).

 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.

The anodized Aluminum base plates with magenets certainly will conduct.

2014 surf students Nichin and Akhil received 40m specific basic safety training last week.

 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.

 PSL, AP, ETMY and ETMX optical tables were scanned for stay beam.