[Rich Koji]

The 9MHz port was tuned and the impedance was measured.

[Rich, Dean, Koji]

Stuffed all inductors for the new LLO EOM. As the impedances were sensitive to the positions of the inductors in the housing, they were glued with a glue gun.
Also the lid of the housing significantly change the stray capacitance and lowers the resonant frequency (meaning lowers the Q too), we decided to tune the matching circuit without the lid.

The attached plots show the measured impedances. They all look well tuned and matched. We will prepare and perform the optical measurement at the 40m.

From Cryo Cav setup

Borrowed LB1005 Servo box -> OMC

Dark current measurement for InGaAs QPDs (OSI FCI-InGaAs-Q3000) has been done using Keithley 2450 and Frank's diode test kit. Frank's setup uses various custom instruments which are no longer exist, therefore the kit was used only for switching between the segments.

The diodes were serialized as 81, 82, 83, 84, continuing the numbering for the OMC QPDs. The numbers are engraved at the side and the back of the diode cans.

Overall, the QPDs nominally indicated the usual dark current level of <10nA.
SEG1 of #82 showed a lower voltage of reverse breakdown but this is not a critical level.
#83 showed variations between the segments compared to the uniform characteristics of #81 and #84.

To know any anomaly to the junction capacitance of the QPD segments, the RF impedances were tested with a hand-made impedance measurement.
All segments look almost identical in terms of capacitance.

Measurement setup:
The impedance of a device can be measured, for example, from the complex reflection coefficient (S11). To measure the reflection, a bidirectional coupler was brought from the 40m. Attachments 1 and 2 shows the connection. The quantity A/R shows S11. The network analyzer can convert a raw transfer function to an impedance in Ohm.

Calibration and Measurement limit:
The network analyzer was calibrated with 1) a piece of wire to short the clips 2) 50ohm resistor 3) open clips. Then the setup was tested with these three conditions (again). Attachment 3 shows the result. Because of the impedance variation of the system (mainly from the Pomona clip, I guess), there looks the systematic measurement error of ~1pF or ~25nH. Above 100MHz, the effect of the stray impedance is large such that the measurement is not reliable.

The setup was tested with a 10pF ceramic capacitor and this indicated it is accurate at this level. The setup is sufficient for measuring the diode junction capacitance of 300~500pF.

Impedance of the QPD segments:

Then the impedances of the QPD segments were measured (Attachment 4). The segments showed the identical capacitance of 300~400pF level, except for the variation of the stray inductance at high freq, which we can ignore. Note that there is no bias voltage applied and the nominal capacitance in the datasheet is 225pF at 5V reverse bias. So I can conclude that the QPDs are quite nominal in terms of the junction capacitance.

(Ed: 11/23/2020 The RF components were returned to the 40m)

The dark noise levels of the four Q3000 QPDs were measured with FEMTO DLPCA200 low noise transimpedance amp.

The measurement has been done in the audio frequency band. The amp gain was 10^7 V/A. The reverse bias was set to be 5V and the DC output of the amplifier was ~40mV which corresponds to the dark current of 4nA. It is consistent with the dark current measurement.

The measured floor level of the dark current was below the shot noise level for the DC current of 0.1mA (i.e. 6pA/rtHz).
No anomalous behavior was found with the QPDs.

Note that there is a difference in the level of the power line noise between the QPDs. The large part of the line noises was due to the noise coupling from a soldering iron right next to the measurement setup, although the switch of the iron was off. I've noticed this noise during the measurement sets for QPD #83. Then the iron was disconnected from the AC tap.
 

I see that these measurements are done out to 100 kHz - I guess there is no reason to suspect anything at 55 MHz which is where this QPD will be reading out photocurrent given the low frequency behavior looks fine? The broad feature at ~80 kHz is the usual SR785 feature I guess, IIRC it's got to do with the display scanning rate.

The amplifier BW was 400kHz at the gain of 1e7 V/A. And the max BW is 500kHz even at a lower gain. I have to setup something special to see the RF band dark noise.
With this situation, I stated "the RF dark noise should be characterized by the actual WFS head circuit." in the 40m ELOG.

The OMC cables #4 arrived on Feb 3rd. (See Attachment)

This shipment included two DCPD cables and two QPD cables. It means that the direct wiring from the PZT to the mighty mouse connectors was not included in the shipment.

Inspection

Updated ICS (Shipment-12578) and moved those parts to Storage-9482.

Inspection showed the following:

• Serial numbers matched the packing list
• SN S1301807: We observed some discoloration on the Gore wire close to one cable termination. [Attachment 1]
  • greenish tint
  • appeared to be superficial
  • slight removal observed when gently wiped with an IPA soaked AlphaWipe ("red wipe")
  • did not follow the helical of the teflon sheath
  • recommend additional inspection when Unit 4 build is resumed
• Cables were returned to the box labeled "OMC Cables" in the south cabinets in the OMC lab.

Observations for aLIGO OMC Unit 4 Build

An ICS Record Navigator search of onboard OMC cables reveals the following quantities appear to have been fabricated for aLIGO.

• D1300371 = Qty 3
• D1300372 = Qty 5
• D1300374 = Qty 3
• D1300375 = Qty 5

The leftover cables are all of the long variety (D1300372, D1300375), and the received quantities make sense. 3 aLIGO OMC assemblies used quantity 3 of each cable, leaving the remaining cables which had been stored at LHO:

• D1300372 = Qty 2
• D1300375 = Qty 2

The received cables from LHO may apparently be used interchangably, and the extra slack (~ 5", compared to the D1300371, D1300374 part numbers) should be managable.

Next Steps for aLIGO OMC Unit 4 Build

We will move forward in fabricating Unit 4 with the received cables from LHO, despite their extra length.

To complete the Unit 4 on board cable set (refer to OMC_Lab/203), we will need to crimp pins onto the PZT leads, and we need to find, clean, and bake quantity 1 4 pin mighty mouse connector.

• PZT leads terminate crimp pins inserted into Glenair Mighty Mouse 803-003-07M6-4PN-598A (per OMC_LAB/203, record navigator)
• Cable bracket interface to OMCS is Glenair Mighty Mouse 803-003-07M6-4PN-598A (per D1300376-v3).

I will ask Chub to see if there are any Class A spares of the PZT termination connector already on hand.

[Camille, Stephen, Thejas]

PZT model: Noliac 2124

Qty: 18 (Sr. No. 30 - 48)

Today, PZT dimensions were measured. Inner radius of the ring and thickness at different points can be used to determine the wedge angle and direction of the PZTs. This is essential for evaluation of appropriate combination of subassembly (curved mirror + PZT + Hole prism) prior to bonding them. 

Oplev setup was built: arm length about 2 m 

As the PZT 44 was actuated with a drive voltage 0-150 V signal was observed on the Spectrum Analyser.

The signal on the top and bottom are X and Y signals from the QPD. This will analyzed and other PZTs will undergo similar measurement. 

The op-lev setup was modified slightly (picture attached). The He-Ne laser was replaced with one with a lower divergence angle. The stage that the PZT/mirror stack sits on was replaced with a setup that allows for tip/tilt adjustements. The PZTs were driven from 0 to ~92V at 0.5Hz. The total path length from the PZT stack to the QPD is ~1.6m.
The following PZTs have been measured in the current oplev setup: 37, 38, 39, 40, 41, 42, 43, 44, 46, 47, 48.

Work log for June 14, 2023

• Selected QPDs from the stock: QPD#62 for QPD1 and QPD#70 for QPD2 were selected from the QPD stock T1200063.
• The legs of the QPDs were trimmed so that the cable could completely flush with the mount.
• A test PD (Excelitas) was mounted on a DCPD housing.
• They are ready for installation and testing.

QPD#              QPD1       QPD2
Housing#          #008       #009
Diode#            #62        #70
Shim              2.50mm 05  0.75mm 08   (see D1201467)
-------------------------------------
Power Incident     76.5 uW   71.5 uW
Sum Out            49.0 mV   50.2 mV
Vertical Out      -16.0 mV    8.2 mV
Horizontal Out    - 2.4 mV   -3.6 mV
SEG1              - 8.2 mV  -16.2 mV
SEG2              - 8.0 mV  -13.0 mV
SEG3              -15.1 mV  - 9.5 mV
SEG4              -17.4 mV  -11.5 mV
-------------------------------------
Spot position X   + 8   um  +33   um  (positive = more power on SEG1 and SEG4)
Spot position Y   +81   um  -52   um  (positive = more power on SEG3 and SEG4)
-------------------------------------
Responsivity[A/W] 0.64      0.70
Q.E.              0.75      0.82
-------------------------------------

Arrangement of the segments
View from the beam
/ 2 | 1 X
|---+---|
\ 3 | 4 /

---------------

I(w,x,y) = Exp[-2 (x^2 + y^2)/w^2]/(Pi w^2/2)

(SEG_A+SEG_B-SEG_C-SEG_D)/(SEG_A+SEG_B+SEG_C+SEG_D) = Erf[sqrt(2) d/w]

d: distance of the spot from the center
w: beam width

[Camille, Thejas, Stephen]

The DC response of the PZT was measured using the following setup (pictures attached):
The output from a HeNe laser was transmitted through two lenses forming a beam reducer, giving us a beam size of 0.34mm. The PZT was placed on a labjack and a 62g washer was placed on top of the PZT. The HeNe beam grazes the top of the washer and the beam is monitored by a photodiode. The labjack height is adjusted so that the PZT stack clips half of the beam signal. 
In order to avoid scatter as the beam grazes the top surface of the washer, an extra layer of kapton tape was placed on one side of the bottom of the washer, giving it a slight tilt so that the beam is clipped by the washer at the front surface of the washer (surface closest to beam source).
The PZT was driven from 0 to 150V at 0.5Hz using a triangle function. The drive function and the photodiode response was recorded using a spectrum analyzer.
The DC resposne was measured twice for each PZT: before the reliability test and again after the reliability test.

Calibration of the DC response measurement:
The setup was calibrated using a height gauge with a dial indicator to monitor the labjack height. (A PZT was not needed for the calibration; only the labjack and the washer.) The labjack was adjusted so that its height is such that the entire beam just passes over the top and the photodiode response was recorded.
The labjack height was increased in 10um increments, with the photodiode response recorded at each increment. The height values were plotted against the photodiode response values. The slope of this line was used to convert the photodiode response from mV to um.

[Camille, Thejas, Stephen]

To test the reliability of the PZTs, they were driven for 10^7 cycles. (At 100Hz, this is ~28 hours.) The drive function was a 100Hz sine wave with peak-to-peak amplitude of ~100V. The drive function was monitored using an oscilloscope and recorded at the start of the test. A thermal imaging camera was used to record the temperature of each PZT at the start of the drive and at ~10 minute intervals during the first hour of the drive. The temperatures of the PZTs are expected to rise slightly (1 or 2 degC above ambient) and then level off during the first hour or so.
At the end of the drive (10^7 cycles), the temperature of each PZT is recorded again and the drive function on the oscilloscope is also recorded to verify that the peak-to-peak amplitude did not change.

[Camille, Thejas, Stephen]

Results for PZT reliability tests:

Batch 1: SN37, SN38, SN39, SN44
Batch 2: SN41, SN42, SN43, SN46, SN47, SN48

The reliability tests were performed using the procedure described in https://nodus.ligo.caltech.edu:8081/OMC_Lab/?mode=full&reverse=0&reverse=1&npp=50&Subject=Summary+of+PZT+reliability+test+procedure

Results for PZT reliability test:
Batch 3: SN31, SN32, SN35, SN40, SN45

This reliability test was performed using the procedure described in https://nodus.ligo.caltech.edu:8081/OMC_Lab/?mode=full&reverse=0&reverse=1&npp=50&Subject=Summary+of+PZT+reliability+test+procedure

*Note: The drive function used here was a triangle function (not sine function).

PZTs 31, 32, 35, 40 and 45 have had their DC responses measured (pre-reliability test) and have been through the reliability test (see 564). We still need to measure their DC responses post-reliability test.

Camille and Thejas will plan to do these measurements tomorrow afternoon (15 Sept. 2023).
Notes for setup:
-The setup will be the same as 542 and 551.
-0.5 Hz triangle wave 0-150V
-8s aquisition time (128Hz sample rate) on SRS785 spectrum analyzer
-62g washer on top of the PZT
-Same laser, collimation lenses (beam size 0.34mm at edge of washer), and photodiode
-Record photodiode response and voltage to the PZT

Aidan and Hanna wanted to use the Agilent 4395A Network Analyzer at the WB251.
All the connections were removed. Unrelated units including an HP FFT analyzer and the Linux PC were also removed.

- The floor of the room was cleaned and waxed!

- Sticky mats are placed! Now we require shoe covers!

- Work benches are being built. One unit is done.

- The other is half done because the table top has chippings.

It seemed that a laser safety barrier was installed today!?

Last Friday, new workbenches were installed. Vladimir got a new table and a cleanroom stool.

The other two workbenches were also nicely set.

Two switches are connected in series.

A carpenter has come to install the eyeware storage and hooks for the face shields.

Preparation for ionized N2 blow

- 99.9998% N2 cylinder delivered (ALPHAGAZ 2 grade by AIR LIQUIDE) ALPHAGAZ 2 [PDF]

- Filter and Arcing module already in the lab

- A brass regulator to be installed (Done - March 24)

- 50 ft air line already in the lab / needs to be wiped/rinsed (Done - March 24)

- Air line and filter installed (Done - March 24)

[Steve, Aaron, Koji]

We've finished the preparation for the forthcoming plumbing work on (nominally) Sept 16th Saturday.
We've covered most of the west side of the OMC lab with plastic sheets and wraps.

Some tips:

• The plastic sheets Eric gave us were a bit too thin and pron to got torn. Thicker sheets are preferable.
• The blue tape that Eric gave us was very useful.
• The stretch wrap film, which I bought long time ago, was so useful. Office Depot "Office Depot(R) Brand Stretch Wrap Film, 20 x 1000 Roll, Clear" PN: 445013
• We also used patches of Kitchen Trash Bags to cover some small opening of the large sheets. Office Depot "Glad(R) Tall Kitchen Trash Bags, 13 Gallon, White, Box Of 28" PN 269268

Black and Decker Glue Baking Oven came back to the OMC lab on Aug 10, 2020, Georgia had lent the unit for the SAMS assembly/testing.

I've cleared the small optical table and wondered how to move it out of the room. Fortunately, the north side of the big table had wide enough clearance and let the 36" wide table go through. This was easy without moving other heavy stuff.

From here to the door, a bit of work is required. A possibility is to roll the laser blocking wall to the south side of the big table. This will require moving the shelving in the entrance area but it's not a lot of work compared to disassembling a part of the wall.

If this does not work somehow, we will consider removing the last panel of the wall and it will definitely allow the table to get out from the door.

HEPA is quite low for a tall person and also the curtain on the back of us is always heavy. It's very tough for anyone to work with. (See Attachment 1)

I did the lab and table organization so that the HEPA expansion work can be resumed.
The 4th OMC is still on the table with the transport fixture (See attachment 3), but it is secured on the table. The risk of damaging the OMC is low now.

Chub can start working on the HEPA. Occasionally Camille and Thejas may work on the optical setup with the OMC. It is fine as long as both happen at the same time.

Chub, JC, and co worked on the HEPA enclosure improvement.

Chub finished the HEPA enclosure extension project.

Here are the dimensions of the LED strips and their gaps.

[JC, Koji]

We've installed the LED strips on the HEPA frame. We tried not to touch the OMC there. But please check if everything is still ok.

Attachment 1: Installed LED light. Notice the room light is off. At the max brightness, it's still sufficient to work with the room light off.

Attachment 2: The strips are connected at the south side of the HEPA booth. LEDs are attached to the frame with the default double-sided tape. We can improve how the wire is fixed on the frame by more tapes.

Attachment 3: The switch is close to the TOPGUN unit. The single click does turn on/off, and the long touch makes the brightness go up and down. At the max and min brightness, it blinks.

LIGO Document G1200683-v1:
aLIGO OMC fabrication and testing plan

aLIGO OMC wiki

Facility

• Work
  • Replacing wooden work benches
    • W60" x H28-34" x D30" http://www.globalindustrial.com/p/work-benches/systems/adjustable-height/60x30-esd-square-edge-power-apron-production-bench-blue
    • W72" x H28-34" x D30" http://www.globalindustrial.com/p/work-benches/systems/adjustable-height/72x30-esd-square-edge-power-apron-production-bench-blue
    • Lower shelf W60" http://www.globalindustrial.com/p/work-benches/systems/adjustable-height/60-w-lower-shelf-bench-15-d-blue 
    • Lower shelf W72" http://www.globalindustrial.com/p/work-benches/systems/adjustable-height/72-w-lower-shelf-bench-15-d-blue
  • Replacing a cabinet at the south wall by a lockable cabinet
    • W36" x H72" x D20"
  • Cleaning of the floor
  • Plug a big hole on the wall (Done)
  • Plug slits on the roof of the HEPA booth - "There should be the blanking panels there."
     
  • Install laser Safety curtain (Peter is working on this)
     
  • Place a sticky mat
  • Prepare clean supplies (Shoes/Coverall/Hats/Gloves) => go to VWR stock room
  • Prepare Al foils (All foils inc, should get a certificate everytime to ensure UHV compatibility)
  • Plastic boxes for storage http://www.drillspot.com/products/422140/Rubbermaid_2282-00-CLR_18GAL_Clear_Snap_Case
    (Steve is helping Koji to get them)
     
• Design
  • Optical layout
     
• Test
  • Confirm particle level
     
• Note: Optical Table W96" x D48" x H27"

Mechanics

• Work 
  •  
• Design
  • How do we hold the PDs, QPDs, and black glass - we put 2 PDs and 2 QPDs on the PD mounting blacket.
  •  
•  
• Test
   
• Things to be tested
  • New suspension scheme (cup & cone design)
  • Balancing the plates
  • Dummy metal payload?
• => Suspending test with a suspension cage for a Faraday isolator@CIT
  • Supporting block for the suspension cage (to mimic the OMC suspension)
• Things to be designed
  • Wire end (cone)
  • Diode holding structures
    PD/QPD/PZT holding structure
• PZT alignment
• Prototyping with metal parts?
• UV glue? (heat) / gluing test
• Balance / ballast
   
• Solid works

Optics

• Mirrors to be delivered ~Aug
• Design down select
  • Between "Single output & BS" vs "Two outputs & no BS"
• Mode design
• Finalization of scattering paths / PD angles etc
   
• Things to be decided / confirmed:
  • How to handle optics / assemblies (Talk to the prev people)
  • First contact? (Margot: applicable to a short Rc of ~2.5m)
  • Gluing templates to be designed (how to handle it?)
• Things to be tested:
  • R&T of each mirror
  • Cavity ref/trans/finesse
  • PD QE / incident angle
     
• What PD do we use?
   
• CCD beam analyzer (Zach: It is fixed.)
   
• PD angle measurement
• Obtain EG&G 3mm PDs

Electronics

• Electronics / CDS electronics / software
   
• Things to be tested
  • QPD/PD pre-selections (QE/noise)
  • Functionality test of QPD/PD/PZT

Shipping, storage etc

• Shipping cage drawing
  https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=70209

Jun/July
    - Lab renovtion
    - Mechanics design
    - Glue training
Aug
    - Mirror delivery
    - Basic optics test
Sept
    - Cavity test
    - Suspending test
NOV~DEC
    - Shipping to LLO

Open questions
    Two optical designs
    Procedure
    Modeling
    Clamp design / stencil design
    gluing-installation procedure

Facility/Supplies

• Work in progress
  
  • Floor cleaning
  • Plug slits on the roof of the HEPA booth - blanking panels have been ordered (Peter)
  • Install laser safety barrier (Peter is working on this)
  • Place a sticky mat
     
• Work to be done
  • Replacing a file cabinet next to the south wall by a lockable cabinet
  • Replacing a lab desk at the west side of the room. (Vladimir's)
  • Replacing Vladimir's rack with nicer one.
  • Laser sign
  • Safety glass holder
  • Prepare clean supplies (Shoes/Coverall/Hats/Gloves) => go to VWR stock room
    
    • glove 8.5,9,9.5
       
  • Label maker (P-Touch) & Tape
     　
• Design
  • Optical layout - Laser SOP
  • Additional HEPA stage
     
• Test
  • Confirm particle level
     
• Note: Optical Table W96" x D48" x H27"

Beaurocracy

• Laser SOP
• HV use?
• UV?

Mechanics

• Ongoing Work 
  • Cone-shaped wire clamp design (at the OMC end) - Jeff
     
• Design
  • Wire preparation fixture - Jeff
  • How do we hold the PDs, QPDs, and black glass - we put 2 PDs and 2 QPDs on the PD mounting blacket. - Jeff
  • Integrated solidwork model - Sam
    • Q: How the wires are clamped at the top side?
    • Q: How much the length of the wire should be?
    • Q: Locations of the wire mounts on the plate
  • Cabling investigation:
    • Where do the cables from the feed-thrus anchored? - Sam
    • List of the current internal cables and their lengths - Sam
    • List of the required internal cables and their lengths
    • Can we route the intermediate stage of the suspension? Do we need new cables?
  • Dummy intermediate stage structure
     
  • Metal templates
    • First, decide an optical design
    • takes at least a month
       
  • Weights how heavy / how many
     
• Test
  • Cone-shaped wire clamp test - Jeff/Koji 
  • Balancing the plates
    • The Faraday isolator cage isn't clean
  • Dummy metal payload test at the sites???
     
• Procedures to be decided
  • PZT alignment
  • Prototyping with metal parts?
  • UV glue? (heat) / gluing test
  • Balance

Optics

• Ongoing Work 
  
  • Mirrors to be delivered ~Aug
     
  • Design down select - Between "Single output & BS" vs "Two outputs & no BS"
  • Down selecting procedure:
    
    1. Assume ELIGO beam component
    2. Assume amount of 9MHz / 45MHz sidebands at the OMC input
    3. Calculate transmitted power
    4. Require HOM to be smaller than the TEM00 offset 
        
  • UV cured epoxy (Quate obtained)
    
    • Electronic Materials Inc.'s Optocast 3553LV-UTF-HM
      (A Low Viscosity, Ultra Thin Film epoxy with Heat Mechanism. The assembly/cure procedure includes both a UV binding step and a 120 degree cure for 24 hours.)
    • Ref1: Dennis Coyne, LIGO-E960050-v11,
      https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=3879
    • Ref2: Tobin Fricke, LIGO Document P1000010-v1, Homodyne detection for laser-interferometric gravitational wave detectors
      https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=8443
    • Ref3: OMC Construction Wiki https://awiki.ligo-wa.caltech.edu/aLIGO/OMC_Construction
    • The glue should be stored at T<0degC ==> Freezer in a lab
       
• Design
  
  • Mode design for HAM6 layout
  • Finalization of scattering paths
     
• Tests
  • Measurement of PD angles
  • R&T of each mirror
  • Curvature of the curved mirrors
  • Cavity ref/trans/finesse
  • PD Q.E. & Reflectivity measurement vs incident angle
     
• Things to be decided / confirmed
  • How to handle optics / assemblies (Talk to the prev people)
  • First contact? (Margot: applicable to a short Rc of ~2.5m)
  • Gluing templates to be designed (how to handle it?)
     
• PDs
  • Primary choice for DC PD: Exelitas C30665GH 3mm
    0.76A/W => Q.E. 0.88
    http://www.excelitas.com/downloads/dts_pe_pd_14_ingaasandsipindiodes.pdf
     
  • Primary choice for DC QPD: OSI FCI-InGaAs-Q3000
     
• Misc
  • CCD beam analyzer (Zach: It is fixed.)
  • Are two PZTs used?
    • YES, for redundancy, range, upconversion tests.
       
• Things to buy
  • Obtain EG&G 3mm PDs
  • Black Glass / Black Glass holder
  • Acetone.
  • N2 cylinder: 4N - UHP or 5N - Research Grade.
  • Paper lens tissue
  • Lint free cloth
  • The ionized gun used in the clean room at Downs: made by Terra Universal.com
    http://www.terrauniversal.com/static-control/ionizing-blow-off-guns.php
  • Flow path: N2 cylinder - Filter - Gun
  • Freezer

• Need to buy a fiber for mode cleaning?
  
• Mode content of the ELIGO dark beam?
• Jitter noise?
• How to determine the design?
• Why Fused Silica? (How much is the temp fluctuation in the chamber?)
• How to align the cavity mirrors, input mirrors, QPDs, PDs, beam dumps.
   

Electronics

• Thorough scrutinization of cabling / wiring / electronics
• Electronics / CDS electronics / software
• Things to be tested
  • QPD/PD pre-selections (QE/noise)
  • Functionality test of QPD/PD/PZT

Shipping, storage etc

• Shipping cage drawing
  https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=70209

Jun/July
    - Lab renovtion
    - Mechanics design
    - Glue training
Aug
    - Mirror delivery
    - Basic optics test
Sept
    - Cavity test
    - Suspending test
NOV~DEC
    - Shipping to LLO

Open questions
    Two optical designs
    Procedure
    Modeling
    Clamp design / stencil design
    gluing-installation procedure

July:Facility/Supplies

• Completed Work: Facility/Supplies
  • Plug a big hole on the wall
  • Purchasing work benches
    
    • W60" x H28-34" x D30" http://www.globalindustrial.com/p/work-benches/systems/adjustable-height/60x30-esd-square-edge-power-apron-production-bench-blue
    • Lower shelf W60" http://www.globalindustrial.com/p/work-benches/systems/adjustable-height/60-w-lower-shelf-bench-15-d-blue
  • Wooden work benches removed(arranging the work with Louisa)
     
  • Al foils (All foils inc, should get a certificate everytime to ensure UHV compatibility)
  • Laser / UV safety glass/face mask (Ordered with Gina, UV face shield ordered through Techmart)
    • 35-200 Laser Glasses (PN 100-35-200) Qty.2 Price 189.00 ea
      http://www.lasersafetyindustries.com/35_200_Laser_Safety_Glasses_p/35-200.htm
    • Black Sport-wrap Laser Glasses 950-3600 nm (PN 100-38-200) Qty.1 Price 169.00 ea
      http://www.lasersafetyindustries.com/Black_Sport_wrap_Glasses_Diode_Nd_YAG_Er_YAG_p/100-38-200.htm
    • VWR has FACE SHIELD UVC-803 and this is ANSI-Z87.1 1986 compliant and the O.D. is more than 5.
      https://us.vwr.com/store/catalog/product.jsp?catalog_number=33007-151
  • Sticky mat
    
    • VWR MAT ADHESIVE 30L 18X36 BLU, 21924-110
  • Shoe cover
    • VWR SHOECVR NSKID AP XL 150PR, 414004-650
    • VWR SHOECVR NSKID AP 2XL 150PR, 414004-651
  • Lab coat
    
    • VWR Lab coat L 82007-618 / XL 82007-620
  • Hat
    
    • VWR Hat 10843-053
  • Mask
    
    • VWR Face Masks 10869-020
  • Gloves
    
    • VWR GLOVE ACCTCH NR-LTX SZ7.5 PK25 79999-306 x4
    • VWR GLOVE ACCTCH NR-LTX SZ8 PK25 79999-308 x4
  • Plastic boxes for storage
    http://www.drillspot.com/products/422140/Rubbermaid_2282-00-CLR_18GAL_Clear_Snap_Case
    (We have 12 for now. More stored at the 40m)
     
• Completed Work: Optics
  • UV Lamp arrived (shipped from LLO)
    
  • Fiber light guide for UV lamp (Quote obtained / Ordered via techmart) 

Nicolas Smith,
LIGO Document T0900383-v1
3mm Photodiode Characterization for Enhanced LIGO
https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=4498

Tobin Fricke,
LIGO Document P1000010-v1
Homodyne detection for laser-interferometric gravitational wave detectors
https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=8443

Nicolas Smith,
LIGO Document P1200052-v1
Techniques for Improving the Readout Sensitivity of Gravitational Wave Antennae
https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=90498

• Completed Work: Facility/Supplies
  • Plug a big hole on the wall [ELOG]
  • Purchasing work benches
    
    • W60" x H28-34" x D30" http://www.globalindustrial.com/p/work-benches/systems/adjustable-height/60x30-esd-square-edge-power-apron-production-bench-blue
    • Lower shelf W60" http://www.globalindustrial.com/p/work-benches/systems/adjustable-height/60-w-lower-shelf-bench-15-d-blue
  • Wooden work benches removed(arranging the work with Louisa)
     
  • Al foils (All foils inc, should get a certificate everytime to ensure UHV compatibility)
  • Laser / UV safety glass/face mask (Ordered with Gina, UV face shield ordered through Techmart)
    • 35-200 Laser Glasses (PN 100-35-200) Qty.2 Price 189.00 ea
      http://www.lasersafetyindustries.com/35_200_Laser_Safety_Glasses_p/35-200.htm
    • Black Sport-wrap Laser Glasses 950-3600 nm (PN 100-38-200) Qty.1 Price 169.00 ea
      http://www.lasersafetyindustries.com/Black_Sport_wrap_Glasses_Diode_Nd_YAG_Er_YAG_p/100-38-200.htm
    • VWR has FACE SHIELD UVC-803 and this is ANSI-Z87.1 1986 compliant and the O.D. is more than 5.
      https://us.vwr.com/store/catalog/product.jsp?catalog_number=33007-151
  • Sticky mat
    
    • VWR MAT ADHESIVE 30L 18X36 BLU, 21924-110
  • Shoe cover
    • VWR SHOECVR NSKID AP XL 150PR, 414004-650
    • VWR SHOECVR NSKID AP 2XL 150PR, 414004-651
  • Lab coat
    
    • VWR Lab coat L 82007-618 / XL 82007-620
  • Hat
    
    • VWR Hat 10843-053
  • Mask
    
    • VWR Face Masks 10869-020
  • Gloves
    
    • VWR GLOVE ACCTCH NR-LTX SZ7.5 PK25 79999-306 x4
    • VWR GLOVE ACCTCH NR-LTX SZ8 PK25 79999-308 x4
  • Plastic boxes for storage
    http://www.drillspot.com/products/422140/Rubbermaid_2282-00-CLR_18GAL_Clear_Snap_Case
    (We have 12 for now. More stored at the 40m)
     
• Completed Work: Optics
  • UV Lamp arrived (shipped from LLO)
    
  • Fiber light guide for UV lamp (Quote obtained / Ordered via techmart)
  • Optical test planning by Zach [ELOG]
  • How to handle First Contact by Margot [ELOG]
  • Useful links / OMC scanning [ELOG]

Completed work of the previous months: [Jul] [Aug] [Sep] [Oct] [Nov] [Dec]

Facility/Supplies

• Work done
  • Floor cleaning [ELOG]
  • Placing sticky mats [ELOG]
  • Label Maker purchased
  • Ordered a lab desk at the west side of the room
    http://www.globalindustrial.com/p/work-benches/systems/adjustable-height/72-l-x-36-w-production-bench-esd-square-edge-blue-2
  • Ordered clean / ESD  stools (~25" height)
    http://www.globalindustrial.com/p/office/stools/vinyl/esd-safe-vinyl-clean-room-stool-with-nylon-base-with-drag-chain-blue
  • Asked Gina for the electronics rack
    www.racksolutions.com/server-racks-cabinets-enclosures.html
    36U Height / 20" depth + Caster kit
  • 5 shelves ordered from AlliedElectronics (Quest technology ES0319-0115, 19"x15" non-vented shelf)
    http://www.racksolutions.com/rack-shelves
  • Plug slits on the roof of the HEPA booth (Peter)
  • Laser safety barrier (Peter) [ELOG]
  • Workbenches and clean room stools [ELOG]
     
• Things ordered
  
  • Office Depot
    • [delivered] Office Depot(R) Brand Stretch Wrap Film, 20 x 1000 Roll, Clear / 445013
    • [delivered] Eveready(R) Gold AA Alkaline Batteries, Pack Of 24 / 158448
    • [delivered] Rubbermaid(R) Roller Sponge Mop / 921841
    • [delivered] Rubbermaid(R) Roller Sponge Mop Replacement / 921858
    • [delivered] Rubbermaid(R) Sanitizing Caddy, 10 Quarts, Yellow / 674125
    • [delivered] Glad(R) Tall Kitchen Trash Bags, 13 Gallon, White, Box Of 28 / 269268
  • Global Industrial Equipment
    
    • [delivered] Extended Surface Pleated Cartridge Filter Serva-Cell Mp4 Slmp295 12X24X2 Gl    WBB431699
  • Global Industrial Equipment
    
    • [delivered] Nexel Poly-Z-Brite Wire Shelving 30"W x 21"D x 63"H Nexel Poly-Z-Brite™ Wire Shelving Starter Unit WB189209
    • [delivered] Stem Casters Set of (4) 5" Polyurethane Wheel, 2 With Brakes 1200 lb. Capacity WB500592    
  • Rack Solutions
    • [delivered] Open Frame Server Racks
      1 x 20" Depth Kit (Ideal for Audio/Video or Networking Racks) P/N: 111-1779
      1 x 36U, Rack-111 Post Kit P/N: 111-1728
      1 x Caster Kit for Open Frame RACK-111 P/N: 111-1731
    • [delivered] 36U Side Panel Kit $199.99 P/N: 102-1775
  • Rack shelf
    • [delivered] 1 RMS 19 X 15 SINGLE SIDED NON-VENTED SHELF 70121637
  • Work bench, Stools
    • [not yet] 72"L X 30"W Production Bench - Phenolic Resin Square Edge-Blue Form attached WB237381LBL    
    • [not yet] 72"W Lower Shelf For Bench - 15"D- Blue Form attached WB606951    
    • [not yet] ESD-Safe Vinyl Clean Room Stool with Nylon Base with Drag Chain Blue Form attached WBB560852    
  • P Touch
    • [delivered] Brother PT-2030 Desktop Office Labeler Punch-out product 672828    
    • [delivered] Brother(R) TZe-241 Black-On-White Tape, 0.75 x 26.2 Punch-out product 239384    
    • [delivered] Brother(R) TZe-231 Black-On-White Tape, 0.5 x 26.2 Punch-out product 239400    
      
  • UV light guide
    • [delivered] Fiber Optic Single Light Guide 5mm OD X 3mm ID X 1M L Note: This light guide can be used with MKIII UV Cure unit. OLB1081
  • Gloves (7.5, 8.0)
    • [delivered] GLOVE ACCTCH NR-LTX SZ7.5 PK25 Punch-out product 79999-306
    • [delivered] GLOVE ACCTCH NR-LTX SZ8 PK25 Punch-out product 79999-308
  • Lab coat (L,XL), Sticky Mat, Shoe Covers (L, XL), Cap, Mask
    • [delivered] LAB XP WH EL WR.COLL. NP L30EA Punch-out product 82007-618
    • [delivered] LAB XPWH EL WR.COLL. NP XL30EA Punch-out product 82007-620    
    • [delivered] VWR MAT ADHESIVE 30L 18X36 BLU Punch-out product 21924-110 (This was too small)
    • [delivered] VWR SHOECVR NSKID AP 2XL 150PR Punch-out product 414004-651    
    • [delivered] VWR SHOECVR NSKID AP XL 150PR Punch-out product 414004-650    
    • [delivered] CAP BOUFFANT 24IN RAYON CS500 Punch-out product 10843-053    
    • [delivered] MASK VLTC TIES N/STRL PK50 Punch-out product 10869-020
      
  • VWR
    • [delivered] FACE SHIELD UVC-803 Supplier: UVP 33007-151
       
  • [Delivered] Laser safety glasses
    
    • 35-200 Laser Glasses (PN 100-35-200) Qty.2 Price 189.00 ea
      http://www.lasersafetyindustries.com/35_200_Laser_Safety_Glasses_p/35-200.htm
    • Black Sport-wrap Laser Glasses 950-3600 nm (PN 100-38-200) Qty.1 Price 169.00 ea
      http://www.lasersafetyindustries.com/Black_Sport_wrap_Glasses_Diode_Nd_YAG_Er_YAG_p/100-38-200.htm

• Work in progress
  
  • 
     
• Work to be done
  • Replacing a file cabinet next to the south wall by a lockable cabinet
  • Laser sign
  • Safety glass holder/rack/shelf
  • Prepare clean supplies ~ glove 8.5,9,9.5
  • Ion gun safety issues: https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=88631
     　
• Design
  • Optical layout - Laser SOP
  • Additional HEPA stage
     
• Test
  • Confirm particle level
     
• Note: Optical Table W96" x D48" x H27"

Beaurocracy

• Laser SOP
• HV use?
• UV?

Mechanics

• Ongoing Work 
  • Cone-shaped wire clamp design (at the OMC end) - Jeff
     
• Design
  • Wire preparation fixture - Jeff
  • How do we hold the PDs, QPDs, and black glass - we put 2 PDs and 2 QPDs on the PD mounting blacket. - Jeff
  • Integrated solidwork model - Derek
    • Q: How the wires are clamped at the top side?
    • Q: How much the length of the wire should be?
    • Q: Locations of the wire mounts on the plate
  • Cabling investigation:
    • Where do the cables from the feed-thrus anchored?
    • List of the current internal cables and their lengths
    • List of the required internal cables and their lengths
    • Can we route the intermediate stage of the suspension? Do we need new cables?
  • Dummy intermediate stage structure
     
  • Metal templates
    • First, decide an optical design
    • takes at least a month
       
  • Weights how heavy / how many
     
  • Earthquake stop design (Sam B)
     
• Test
  • Cone-shaped wire clamp test - Jeff/Koji 
  • Balancing the plates
    • The Faraday isolator cage isn't clean
  • Dummy metal payload test at the sites???
     
• Procedures to be decided
  • PZT alignment
  • Prototyping with metal parts?
  • UV glue? (heat) / gluing test
  • Balance

Optics

• Things ordered
  
  • Newport LB servo
  • Halogen Lamp
  • N2 cylinder/lines/filter
• Ongoing Work 
  
  • Mirrors to be delivered ~Aug
     
  • Design down select - Between "Single output & BS" vs "Two outputs & no BS"
  • Down selecting procedure:
    
    1. Assume ELIGO beam component
    2. Assume amount of 9MHz / 45MHz sidebands at the OMC input
    3. Calculate transmitted power
    4. Require HOM to be smaller than the TEM00 offset 
        
  • UV cured epoxy (Quate obtained)
    
    • Electronic Materials Inc.'s Optocast 3553LV-UTF-HM
      (A Low Viscosity, Ultra Thin Film epoxy with Heat Mechanism. The assembly/cure procedure includes both a UV binding step and a 120 degree cure for 24 hours.)
    • Ref1: Dennis Coyne, LIGO-E960050-v11,
      https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=3879
    • Ref2: Tobin Fricke, LIGO Document P1000010-v1, Homodyne detection for laser-interferometric gravitational wave detectors
      https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=8443
    • Ref3: OMC Construction Wiki https://awiki.ligo-wa.caltech.edu/aLIGO/OMC_Construction
    • The glue should be stored at T<0degC ==> Freezer in a lab
       
• Design
  
  • Mode design for HAM6 layout
  • Finalization of scattering paths
     
• Tests
  • Measurement of PD angles
  • R&T of each mirror
  • Curvature of the curved mirrors
  • Cavity ref/trans/finesse
  • PD Q.E. & Reflectivity measurement vs incident angle
     
• Things to be decided / confirmed
  • How to handle optics / assemblies (Talk to the prev people)
  • First contact? (Margot: applicable to a short Rc of ~2.5m)
  • Gluing templates to be designed (how to handle it?)
     
• PDs
  • Primary choice for DC PD: Exelitas C30665GH 3mm
    Peter has plenty of them
    0.76A/W => Q.E. 0.88
    http://www.excelitas.com/downloads/dts_pe_pd_14_ingaasandsipindiodes.pdf
     
  • Primary choice for DC QPD: OSI FCI-InGaAs-Q3000
     
• Misc
  • CCD beam analyzer (Zach: It is fixed.)
  • Are two PZTs used?
    • YES, for redundancy, range, upconversion tests.
       
• Things to buy
  
  • Black Glass / Black Glass holder
  • Acetone.
  • N2 cylinder: 4N - UHP or 5N - Research Grade.
  • Paper lens tissue
  • Lint free cloth
  • The ionized gun used in the clean room at Downs: made by Terra Universal.com
    http://www.terrauniversal.com/static-control/ionizing-blow-off-guns.php
  • Flow path: N2 cylinder - Filter - Gun
  • Freezer
  • Clean tools, tray, storage

• Need to buy a fiber for mode cleaning?
  
• Mode content of the ELIGO dark beam?
• Jitter noise?
• How to determine the design?
• Why Fused Silica? (How much is the temp fluctuation in the chamber?)
• How to align the cavity mirrors, input mirrors, QPDs, PDs, beam dumps.
• PZTs @LLO
   

Electronics

• Thorough scrutinization of cabling / wiring / electronics
  • ELIGO OMC Wiring diagram D070536-A2
    • Occupies 2 DB25s -> They were anchored on the sus cage
    • Preamps for DCPDs will be fixed on the ISI table
      -> DB25 for the DCPDs will be anchored on the table
    • Use longer thin cables for the DCPDs in order to route them through the suspension stages
    • Turn the heater cable to the one for the other PZT
• Electronics / CDS electronics / software
• Things to be tested
  • QPD/PD pre-selections (QE/noise)
  • PD preamp design (Rich)
  • Functionality test of QPD/PD/PZT

Shipping, storage etc

• Shipping cage drawing
  https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=70209

Jun/July
    - Lab renovation
Aug
    - Mechanics design
    - Mirror delivery
Sept
    - Basic optics test
    - Glue training
Oct
    - Cavity test
Nov
    - Suspending test
Dec
    - Shipping to LLO

Open questions
    Two optical designs
    Procedure
    Modeling
    Clamp design / stencil design
    gluing-installation procedure

We have measured the dimensions and mass of the OMC glass plates/breadboards:

• ^* orientation is relative to "front" face, i.e. long-short face with S/N on it, with S/N upright.
• Height measurements were made twice, once at each end.
• TMeasurements of 03, 05, 02, and 06 were done in the open in the OMC lab.  This was not thought to be too much of an issue since the plates
  are already covered with particulate matter from the tissue paper that they were wrapped in. 
  Measurements of 04 and 01 were done on the optics table, under the clean room enclosure.

Note by Koji:

• The scale of the bake lab was used. (Max 60kg, Min resolution of 1g)
• The dimensions were measured by a huge caliper which Jeff brought from Downs.
• S/N 01, 03, 04 look pretty similar. They should be the primary candidates.

• Work done
  • Floor cleaning [ELOG]
  • Placing sticky mats [ELOG]
  • Label Maker purchased
  • Ordered a lab desk at the west side of the room
    http://www.globalindustrial.com/p/work-benches/systems/adjustable-height/72-l-x-36-w-production-bench-esd-square-edge-blue-2
  • Ordered clean / ESD  stools (~25" height)
    http://www.globalindustrial.com/p/office/stools/vinyl/esd-safe-vinyl-clean-room-stool-with-nylon-base-with-drag-chain-blue
  • Asked Gina for the electronics rack
    www.racksolutions.com/server-racks-cabinets-enclosures.html
    36U Height / 20" depth + Caster kit
  • 5 shelves ordered from AlliedElectronics (Quest technology ES0319-0115, 19"x15" non-vented shelf)
    http://www.racksolutions.com/rack-shelves
  • Plug slits on the roof of the HEPA booth (Peter)
  • Laser safety barrier (Peter) [ELOG]
  • Workbenches and clean room stools [ELOG]
  • OMC Mirros have been delivered (~Oct 10)
  • Halogen light source has been delivered
  • UV light guide has been delivered
     
• Things ordered
  
  • Office Depot
    • [delivered] Office Depot(R) Brand Stretch Wrap Film, 20 x 1000 Roll, Clear / 445013
    • [delivered] Eveready(R) Gold AA Alkaline Batteries, Pack Of 24 / 158448
    • [delivered] Rubbermaid(R) Roller Sponge Mop / 921841
    • [delivered] Rubbermaid(R) Roller Sponge Mop Replacement / 921858
    • [delivered] Rubbermaid(R) Sanitizing Caddy, 10 Quarts, Yellow / 674125
    • [delivered] Glad(R) Tall Kitchen Trash Bags, 13 Gallon, White, Box Of 28 / 269268
  • Global Industrial Equipment
    
    • [delivered] Extended Surface Pleated Cartridge Filter Serva-Cell Mp4 Slmp295 12X24X2 Gl    WBB431699
  • Global Industrial Equipment
    
    • [delivered] Nexel Poly-Z-Brite Wire Shelving 30"W x 21"D x 63"H Nexel Poly-Z-Brite™ Wire Shelving Starter Unit WB189209
    • [delivered] Stem Casters Set of (4) 5" Polyurethane Wheel, 2 With Brakes 1200 lb. Capacity WB500592    
  • Rack Solutions
    • [delivered] Open Frame Server Racks
      1 x 20" Depth Kit (Ideal for Audio/Video or Networking Racks) P/N: 111-1779
      1 x 36U, Rack-111 Post Kit P/N: 111-1728
      1 x Caster Kit for Open Frame RACK-111 P/N: 111-1731
    • [delivered] 36U Side Panel Kit $199.99 P/N: 102-1775
  • Rack shelf
    • [delivered] 1 RMS 19 X 15 SINGLE SIDED NON-VENTED SHELF 70121637
  • Work bench, Stools
    • [not yet] 72"L X 30"W Production Bench - Phenolic Resin Square Edge-Blue Form attached WB237381LBL    
    • [not yet] 72"W Lower Shelf For Bench - 15"D- Blue Form attached WB606951    
    • [not yet] ESD-Safe Vinyl Clean Room Stool with Nylon Base with Drag Chain Blue Form attached WBB560852    
  • P Touch
    • [delivered] Brother PT-2030 Desktop Office Labeler Punch-out product 672828    
    • [delivered] Brother(R) TZe-241 Black-On-White Tape, 0.75 x 26.2 Punch-out product 239384    
    • [delivered] Brother(R) TZe-231 Black-On-White Tape, 0.5 x 26.2 Punch-out product 239400    
      
  • UV light guide
    • [delivered] Fiber Optic Single Light Guide 5mm OD X 3mm ID X 1M L Note: This light guide can be used with MKIII UV Cure unit. OLB1081
  • Gloves (7.5, 8.0)
    • [delivered] GLOVE ACCTCH NR-LTX SZ7.5 PK25 Punch-out product 79999-306
    • [delivered] GLOVE ACCTCH NR-LTX SZ8 PK25 Punch-out product 79999-308
  • Lab coat (L,XL), Sticky Mat, Shoe Covers (L, XL), Cap, Mask
    • [delivered] LAB XP WH EL WR.COLL. NP L30EA Punch-out product 82007-618
    • [delivered] LAB XPWH EL WR.COLL. NP XL30EA Punch-out product 82007-620    
    • [delivered] VWR MAT ADHESIVE 30L 18X36 BLU Punch-out product 21924-110 (This was too small)
    • [delivered] VWR SHOECVR NSKID AP 2XL 150PR Punch-out product 414004-651    
    • [delivered] VWR SHOECVR NSKID AP XL 150PR Punch-out product 414004-650    
    • [delivered] CAP BOUFFANT 24IN RAYON CS500 Punch-out product 10843-053    
    • [delivered] MASK VLTC TIES N/STRL PK50 Punch-out product 10869-020
      
  • VWR
    • [delivered] FACE SHIELD UVC-803 Supplier: UVP 33007-151
       
  • [Delivered] Laser safety glasses
    
    • 35-200 Laser Glasses (PN 100-35-200) Qty.2 Price 189.00 ea
      http://www.lasersafetyindustries.com/35_200_Laser_Safety_Glasses_p/35-200.htm
    • Black Sport-wrap Laser Glasses 950-3600 nm (PN 100-38-200) Qty.1 Price 169.00 ea
      http://www.lasersafetyindustries.com/Black_Sport_wrap_Glasses_Diode_Nd_YAG_Er_YAG_p/100-38-200.htm

Completed work of the previous months: [Jul] [Aug] [Sep] [Oct] [Nov] [Dec]

Facility/Supplies

• Work done
  • Particle Level measured / HEPA activated [ELOG]
  • Particle counter peripherals arrived ~Oct 12.
  • Making the OMC optical test setup [ELOG] [ELOG] [ELOG] [ELOG] [ELOG]
  • OMC Bread board dimensions / weights measurement by Jeff and Jam [ELOG]
  • UV epoxy has arrived - stored in a freezer in the office
    • UV cured epoxy (Quote obtained)
      
    • Electronic Materials Inc.'s Optocast 3553LV-UTF-HM
      (A Low Viscosity, Ultra Thin Film epoxy with Heat Mechanism. The assembly/cure procedure includes both a UV binding step and a 120 degree cure for 24 hours.)
    • Ref1: Dennis Coyne, LIGO-E960050-v11,
      https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=3879
    • Ref2: Tobin Fricke, LIGO Document P1000010-v1, Homodyne detection for laser-interferometric gravitational wave detectors
      https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=8443
    • Ref3: OMC Construction Wiki https://awiki.ligo-wa.caltech.edu/aLIGO/OMC_Construction
    • The glue should be stored at T<0degC ==> Freezer in a lab
  • Laser sign installed during my trip by Peter/Eric
  • OMC design downselect [DCC Link]
     
• Things to buy
  
  • OMC testing optics / opto-mechanics
  • Power strips Tripp Lite PS3612
  • Lab coats
• Things to be done
  
  • Cavity ref/trans/finesse
  • PD Q.E. & Reflectivity measurement vs incident angle

• Work in progress
  
  • RoC measurement
  • R&T measurement
  • Wedge measurement
• Work to be done
  • Replacing a file cabinet next to the south wall by a lockable cabinet
  • Additional clean supplies ~ glove 8.5,9,9.5
  • Stainless bats
  • Ion gun safety issues: https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=88631
     　
• Design
  • Laser SOP
     
• Test
  • Continuous monitoring of the particle level
     
• Note: Optical Table W96" x D48" x H27"

Beaurocracy

• Laser SOP / HV use? / UV?

• Procedures to be decided
  • PZT alignment
  • UV glue? (heat) / gluing test
  • Balance
  • N2 cylinder/lines/filter

• Design
  
  • Mode design for HAM6 layout
  • Finalization of scattering paths
     
• Things to be decided / confirmed
  • How to handle optics / assemblies (Talk to the prev people)
  • First contact? (Margot: applicable to a short Rc of ~2.5m)
  • Gluing templates to be designed (how to handle it?)
     
• PDs
  • Primary choice for DC PD: Exelitas C30665GH 3mm
    Peter has plenty of them
    0.76A/W => Q.E. 0.88
    http://www.excelitas.com/downloads/dts_pe_pd_14_ingaasandsipindiodes.pdf
     
  • Primary choice for DC QPD: OSI FCI-InGaAs-Q3000
• Things to buy
  
  • Black Glass / Black Glass holder
  • Acetone.
  • N2 cylinder: 4N - UHP or 5N - Research Grade.
  • Paper lens tissue
  • Lint free cloth
  • The ionized gun used in the clean room at Downs: made by Terra Universal.com
    http://www.terrauniversal.com/static-control/ionizing-blow-off-guns.php
  • Flow path: N2 cylinder - Filter - Gun
  • Freezer
  • Clean tools, tray, storage

• Need to buy a fiber for mode cleaning?
  
• Mode content of the ELIGO dark beam?
• Jitter noise?
• How to determine the design?
• Why Fused Silica? (How much is the temp fluctuation in the chamber?)
• How to align the cavity mirrors, input mirrors, QPDs, PDs, beam dumps.
• PZTs @LLO
   

Electronics

• Thorough scrutinization of cabling / wiring / electronics
  • ELIGO OMC Wiring diagram D070536-A2
    • Occupies 2 DB25s -> They were anchored on the sus cage
    • Preamps for DCPDs will be fixed on the ISI table
      -> DB25 for the DCPDs will be anchored on the table
    • Use longer thin cables for the DCPDs in order to route them through the suspension stages
    • Turn the heater cable to the one for the other PZT
• Electronics / CDS electronics / software
• Things to be tested
  • QPD/PD pre-selections (QE/noise)
  • PD preamp design (Rich)
  • Functionality test of QPD/PD/PZT

Shipping, storage etc

• Shipping cage drawing
  https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=70209

Completed work of the previous months: [Jul] [Aug] [Sep] [Oct] [Nov] [Dec]

• Work done
  • Particle Level measured / HEPA activated [ELOG]
  • Particle counter peripherals arrived ~Oct 12.
  • Making the OMC optical test setup [ELOG] [ELOG] [ELOG] [ELOG] [ELOG]
  • OMC Bread board dimensions / weights measurement by Jeff and Jam [ELOG]
  • UV epoxy has arrived - stored in a freezer in the office
    • UV cured epoxy (Quote obtained)
      
    • Electronic Materials Inc.'s Optocast 3553LV-UTF-HM
      (A Low Viscosity, Ultra Thin Film epoxy with Heat Mechanism. The assembly/cure procedure includes both a UV binding step and a 120 degree cure for 24 hours.)
    • Ref1: Dennis Coyne, LIGO-E960050-v11,
      https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=3879
    • Ref2: Tobin Fricke, LIGO Document P1000010-v1, Homodyne detection for laser-interferometric gravitational wave detectors
      https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=8443
    • Ref3: OMC Construction Wiki https://awiki.ligo-wa.caltech.edu/aLIGO/OMC_Construction
    • The glue should be stored at T<0degC ==> Freezer in a lab
  • Laser sign installed during my trip by Peter/Eric
  • OMC design downselect [DCC Link]

Completed work of the previous months: [Jul] [Aug] [Sep] [Oct] [Nov] [Dec]

• Work done
  • Wedge measurement (1st trial) [ELOG]
  • RoC measurement [ELOG]

• Work in progress
  
  • R&T measurement
  • Wedge measurement
• Work to be done
  • QPD/PD pre-selections (QE/noise)
  •  
  •  
  •  
  • Misc. / Beaurocracy?
    • Continuous monitoring of the particle level
    • Replacing a file cabinet next to the south wall by a lockable cabinet
    • Ion gun safety issues: https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=88631
    • Laser SOP / HV use? / UV?
• Things delivered
  • The ionized gun used in the clean room at Downs: made by Terra Universal.com (Jeff's room)
    http://www.terrauniversal.com/static-control/ionizing-blow-off-guns.php
  • Flow path: N2 cylinder - Filter - Gun (Jeff's room)
• Things ordered
  • Power strips Tripp Lite PS3612 (Ordered Nov. 8, Delivered Nov. 12)
  • Kapton tapes (1in x 6, 1/2in x 12 Delivered Nov. 15)
  • Sticky Mats (VWR 18888-216 Delivered Nov. 12 and 21992-042)
  • Duck tape (PK3) (Delivered Nov. 12)
  • Wipers 12"x12" 2ply x 119 pairs x case15 (Delivered Nov. 12)
  • Syringes (1mL&2mL) & Needles (20G x dozen)
  • Stainless trays with cover (Steve Delivered Nov. 12)
  • Gold Plated allen keys (Steve Delivered Nov. 12)
  • Forceps (Delivered Nov. 12) / Tweezers / Scissors (Delivered Nov. 12)
• Things to buy / get
  
  • OMC testing optics / opto-mechanics
  • Black Glass / Black Glass holder / AR ==> Some at the 40m, some from LLO
  • Ionized air blow
    • N2 or Air cylinder: 4N - UHP or 5N - Research Grade.  (... steal from Downs)
  • Clean tools, tray, storage
  • Supply
    
    • Additional clean supplies ~ glove 8.5,9,9.5
    • Stainless bats / Pure solvents (Metha / Aceton / Iso) / Syringes / Lint free cloth / Paper lens tissue
    • Lab coats
  • ATF
    • Tefron tape
    • Thorlabs 8-32 screw kit / Thorlabs HW-KIT1
    • Pedestal Shims - Newport
• Things to be done
  
  • Cavity ref/trans/finesse
  • PD Q.E. & Reflectivity measurement vs incident angle
  • Functionality test of QPD/PD (PeterK) /PZT
     

• Procedures to be decided
  • PZT alignment
  • UV glue? (heat) / gluing test
  • Balance
  • N2 cylinder/lines/filter
  • Shipping procedure: New shipping cage design on going (Jeff) => Plastic box similar to COC

• Design
  
  • Solidworks raytracing model
  • Mode design for HAM6 layout
     
• Things to be decided / confirmed
  • How to handle optics / assemblies (Talk to the prev people)
  • First contact? (Margot: applicable to a short Rc of ~2.5m)
  • Gluing templates to be designed (how to handle it?)

• Jitter noise?
• How to align the cavity mirrors, input mirrors, QPDs, PDs, beam dumps.

Electronics ==> Rich

Completed work of the previous months: [Jul] [Aug] [Sep] [Oct] [Nov] [Dec]

• Work done
  • Wedge measurement (1st trial) [ELOG]
  • RoC measurement [ELOG]
  • Laser SOP draft

• Things delivered
  • The ionized gun used in the clean room at Downs: made by Terra Universal.com (Jeff's room)
    http://www.terrauniversal.com/static-control/ionizing-blow-off-guns.php
  • Flow path: N2 cylinder - Filter - Gun (Jeff's room)
  • Power strips Tripp Lite PS3612 (Ordered Nov. 8, Delivered Nov. 12)
  • Kapton tapes (1in x 6, 1/2in x 12 Delivered Nov. 15)
  • Sticky Mats (VWR 18888-216 Delivered Nov. 12 and 21992-042)
  • Duck tape (PK3) (Delivered Nov. 12)
  • Wipers 12"x12" 2ply x 119 pairs x case15 (Delivered Nov. 12)
  • Syringes (1mL&2mL) & Needles (20G x dozen)
  • Stainless trays with cover (Steve Delivered Nov. 12)
  • Gold Plated allen keys (Steve Delivered Nov. 12)
  • Forceps (Delivered Nov. 12) / Tweezers / Scissors (Delivered Nov. 12)
  • OMC testing optics / opto-mechanics
  • SolidWorks raytracing model
  • Mode design for HAM6 layout [Zach]
     
  • Black Glass / Black Glass holder / AR ==> Some at the 40m, some from LLO
  • Ionized air blow
    • N2 or Air cylinder: 4N - UHP or 5N - Research Grade.  (... steal from Downs)

Dmass borrowed the LB1005 servo amp from the OMC lab.
It happened this week although it seems still January in his head. Got it back on Mar 24th

The A2 and C2 mirrors have been sent to Josh Smith at Fullerton for the scatterometer measurement.

First Contact kit (incl. Peek Sheets)
Manasa borrowed the kit on Feb 7. Got it back to the lab.

ALL returned

Loan from ATF:

2 blue banana cables returned on Jun 4, 2013

BNC cable returned on Mar 21, 2013

TENMA triple power supply returned on July 17, 2015

From 40m:

4x GPIB cables returned on Mar 21, 2013

From EE shop:

red banana cables returned on Jun 4, 2013