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

The RoC test setup has been built on the optical table at ATF.

The cavity formed by actual OMC mirrors have been locked.

The modulation frequency of the BB EOM was swept by the network analyzer.
A peak at ~30MHz was found in the transfer function when the input beam was misaligned and clipping was introduced at the transmission PD.
Without either the misalignment or the clipping, the peak disappears. Also the peak requires these imperfections to be directed in the same way
(like pitch and picth, or yaw and yaw). This strongly suggests that the peak is associated with the transverse mode.

The peak location was f_HOM = 29.79MHz. If we consider the length of the cavity is L=1.20m, the RoC is estimated as

RoC = L / (1 - Cos[f_HOM/(c/2/L) * PI]^2)

This formula gives us the RoC of 2.587 m.

I should have been able to find another peak at f_FSR-f_TMS. In deed, there was the structure found at 95MHz as expected.
However, the peak was really weak and the location was difficult to determine as it was coupled with the signal from residual RFAM.

The particle level in the clean booth was occasionally measured. Every measurement showed "zero".

To be improved:

• The trans PD is 1801 which was found in ATF with the label of the 40m. It turned out that it is a Si PD.
  I need to find an InGaAs PD (1811, 1611, or my BBPD) or increase the modulation, or increase the detected light level.
  (==> The incident power on 1810 increased. Oct 17)
• The BS at the transmission is actually Y1-45P with low incident angle. This can be replaced by 50% or 30% BS to increase the light on the fast PD.
  (==> 50% BS is placed. Oct 17)
• I forgot to put a 50ohm terminator for the BB EOM.
  (==> 50Ohm installed. Oct 17)
• A directional coupler could be used for the BBEOM signal to enhance the modulaiton by 3dB.
• The mode matching is shitty. I can see quite strong TEM20 mode.
• Use the longer cavity? L=1.8m is feasible on the table. This will move the peak at 27MHz and 56MHz (FSR=83MHz). Very promising.
  (==> L=1.8m, peak at 27MHz and 56MHz found. Oct.17)

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

KA's question:

Do you know how to apply this epoxy?
Do we need a plunger and a needle for this purpose?

Nic saids:

When we did it with Sam, I seem to remember just squirting some on some foil then dabbing it on with the needle.

Steve and I visited Margot to have a training session for application of First Contact on optics.

- Make "thick" layer of first contact. It becomes thin when it gets dried.

- Apply more FC once a peek sheet is placed on the FC

- Wait for drying (~15min)

- Rip off the FC layer by pulling a peek tab. Make sure the ionized N2 is applied during ripping.

- Margot has a Dark Field Microscope. We checked how the dusts are removed from the surface.
There are many dusts on the mirror even if they are invisible. First Contact actually removes
these dusts very efficiently. Margot told us that even carbonhydrates (like finger prints) can be removed by FC.

Two switches are connected in series.

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)

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

Newport UTR80

• Sensitivity: 4 arcsec
• Graduations: 1 deg
• Vernier: 1 arcmin
• Fine travel range: 4 deg
• No microemeter
• http://www.newport.com/UTR-A-Series-Precision-Steel-Rotation-Stages-with/144549/1033/info.aspx#tab_Specifications

Newport 481-A (SELECTED)

• Sensitivity: 15 arcsec
• Graduations: 1 deg
• Vernier: 5 arcmin
• Fine travel range: 5 deg
• With Micrometer

Newport RS40

• Sensitivity: 16 arcsec
• Graduations: 2 deg
• Vernier: 12 arcmin
• Fine travel range: 10 deg
• Micrometer BM11.5

Newport RS65

• Sensitivity: 11 arcsec
• Graduations: 2 deg
• Vernier: 12 arcmin
• Fine travel range: 10 deg
• Micrometer SM-06 to be bought separately

Elliot science MDE282-20G

• Sensitivity: 5 arcsec
• Graduations: 2 deg
• Vernier: 10 arcmin
• Fine travel range: 10 deg
• Micrometer 2 arcmin/1div
• Metric

Suruga precision B43-110N

• Sensitivity: ? arcsec
• Graduations: 2 deg
• Vernier: 6 arcmin
• Fine travel range: 10 deg
• Micrometer 34 arcsec/div
• http://www.suruga-ost.com/product.php?n=020401228
• Metric

Thorlabs precision B43-110N

• Sensitivity: ? arcsec
• Graduations: 1 deg
• Vernier: 5 arcmin
• Fine travel range: 14 deg
• Micrometer 144 arcsec/div
• http://www.thorlabs.com/thorProduct.cfm?partNumber=PR01

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.

EDIT (ZK): All photos on Picasa. Also, I discovered that since Picasa was migrated to Google+ only,
you no longer have the option to embed a slideshow like you used to. Lame, Google.

Photos sent from Zach

(3D VIEW)

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

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)

Received black glass beam dumps from MIT

- gluing by EP30-2 looks pretty fine. Enough sturdy.

- some gap visible between the glass => incident angle should be considered so that the first beam does not exit from the gap

- Dusts are visible on the glass surface. Some have a lot, the other have less. But every piece still needs to be wiped.

Prototype PZT assembly

Motivation:

Before we glue the PZT assembly, we need to build a prototype. This is to confirm the heat cure process
does not cause any cracking of the PZT or glass components. The CTE of the PZT is 2~3ppm
(depends on the direction) while the one for Fused Silica is 0.55ppm.

Materials:

- A fused silica substrate, 1/2" in dia. Supplied from Garilynn. I defined the chamfered side as the front side.

- PZT: Noliac NAC2124, serial #24, this is a spare PZT as this has the worst length to angle coupling.

- Mounting Prism: D1102069 SN22. This has the worst perpendicularity among the prisms.

- Fixtures:

D1300185 aLIGO OMC CURVED MIRROR BONDING FIXTURE ASSY
D1300186 aLIGO OMC CURVED MIRROR BONDING FIXTURE FRONT
D1300187 aLIGO OMC CURVED MIRROR BONDING FIXTURE BACK
D1300188 aLIGO OMC CURVED MIRROR BONDING FIXTURE RING

Procedure:

- Wipe all of the components with the isopropanol.

- Attach the back piece of the fixture on the Al wrapped bracket.
(The current 4-40 screws for the middle piece are too long and stick out from the back side of the back piece.
Therefore a 1/16" shim for a 1/2" rod is inserted between the bracket and the back piece)

- Brought a glue package to the lab (10:40PM)

- Loosely attach the middle piece to the back piece with four 4-40 screws.

- Insert the mounting prism in the fixture. Insert the PZT in the fixture too.

- Insert a dummy substrate in the fixture.

- Attach the front piece with spring loaded screws.

- Align the PZT and the optic in the fixture. (Basically apply downward force to them)

- Test the rigidity of the assembly (11:30PM)

- Remove the PZT and the mirror. Apply UV epoxy.
(A single dub was applied for each PZT surface of the PZT but this was too much.)

- Make sure the PZT and the optic are aligned by applying the downward force.

- Illuminate UV light from the front.

- Illuminate UV light from the back. (11:50PM)

Procedural issues:

- Long 4-40 screws (described above)
(Circumvented)

- As the PZT is not constrained with the middle piece, it tends to move vertically and rotationally
because of the wire tension. (This is not a mistake but the design so that the PZT is constrained by the optic.)
Therefore after applying glue on the PZT, the motion of the PZT spreads the glue on the back surface of
the curved mirror.
(Solution to be tried) Our solution is to glue the PZT and the mounting prism first with a dummy optics (made of SF2).
The wires should be tacked somewhere on the mount 

- The amount of glue on the PZT was too much. I gave one dub of glue for each side.
As a result, excess glue leaks out along the ring.

- The front plate has a chamfered hole but this tends to slip and move the mirror vertically.
Later I used the flat side of the plate to hole the mirror.
(Circumvented) It seems that this hold the mirror in a better way as the plate can't rock

- Spring load for the front plate was too strong. This was because the natural length of the spring was too long.
(Circumvented) The spring was cut at the length of the 4-40 screw. Then attaching the screws became completely fine.

Result:

Slide show:

WB 18 March

• Diode test
  
  • Dark current / Dark noise / Impedance
  • Quantum Efficiency test (but with glass)
  • Diode given to Bob for cleaning
• Research possible issue of UV light on 1064 HR coating
  
  • ~ppm order loss increase after depositing 3J/cm^2 in 8 hours (i.e. same order to our illumination but in 10s for us)
  • Sent an e-mail to Ke-Xun Sun -> So far, no reply.
• Glue test of PZT+prism+curved mirror with UV bond epoxy 
  
  • Done. Found some handling issues on the fixture.
• Preparation of N2 line:
  
  • Done

Action items:

• Bake test at 100°C for 1 hour at CIT 
  
  • Will be done on 25 Mon-26 Tue at Bob's lab
• Curved mirror characterization
• R&T measurement

25 March (Mon):

Inspect the test PZT assembly

• => Give it to Bob. (done)

Glue topside components (done)

• Clean up the table for the gluing work.
• Prepare the transport fixture on the table.
• Glass breadboard
  • Pick breadboard #1 (cf. [ELOG 27])
  • Wipe the entire glass breadboard with IPA
  • Place the breadboard in the fixture (check which is the upper side)
• Gluing
  • Set the gluing template on the breadboard.
  • Place all of the glass components on the plate (just for confirmation)
  • Wipe (locally) both surfaces to be glued.
  • Apply glue on the component to be glued
  • Align the components in the template. Use the cantilever pusher if necessary.
  • Illuminate UV
  • Repeat the above process for all of the components.
• Close the transport fixture and wrap with Al foil

[Koji Jeff Zach]

AAA

BBB

CCC

DDD

Loan from PSL Lab

- 300mm mirror with Ultima mount and pedestal
- Isopropanol small glass bottleReturned on Apr 12 2013.
- Newport 422-1S single-axis stageReturned on Apr 12 2013.

Loan from ATF Lab

- 50/50 Cube BS 05BC16NP.9 without mount
- 1.5" pedestal (1/4-20 thread), 1/4" shim (1/4-20 through-hole), 1/8" shim (1/4-20 through-hole): 2 eachReturned on Aug 22, 2013.
- PBS & PBS mount
- Newport 422-1S single-axis stageReturned on Apr 12 2013.
- 10 ft BNC cable x 2
- some more BNC (labeled as ATF)Returned on May 20 2013.
- Y1-1037-45P with ultima mount 3inch post
- 1x Newfocus 5104 mirrorReturned on Aug 22, 2013.
- 4x ForkReturned on Aug 22, 2013.

Loan from 40m

- 4 BNC Ts and 1 BNC Ys
- 4 BNC Ts and 1 BNC YsReturned on May 20 2013.
- 6 BNC cablesReturned on May 20 2013.
- SONY CCD / CCD Monitor / CCD power supply
- Optical fiber tester (for fiber alignment) Returned on Apr 9 2013.

26 March (Tue):

- Curved mirror characterization (Koji, done)

- Input optics for the cavity locking (Zach)

Faraday, BB EOM, Resonant EOM, AOM, MZ

27 March (Wed)

- AOM drift investigation (Lisa, Zach)

- Cavity input optics ~ Fiber coupling (Zach)

Action Items

• Glue curved mirror sub-assys.
• R&T measurement

28 March (Thu):

• Rebuild the bottom template in the lab
• Place the bottom template on the OMC
• Glue the PZTs on the mounting prisms (x2)
• Glue the curved mirrors on the PZTs (x2)
• R&T measurement
• Placing optics on the OMC breadboard
   
• Better coupling to the fiber
• Matching to the OMC cavity

29 March (Fri):

Start gluing bottom side: Set 4 cavity mirrors and 1 HR mirror
   and try to resonate beam.  Glue when OK.

Place BS and DCPD mounting brackets.  Glue when OK.
Friday: Place QPDs and rest of optics.  Glue when OK.

WB 1 April

• Testing at CIT
  
  • Transmission / Coupling / Loss
  • FSR / TMS
  • Power dependence
  • PZT position dependence
  • Back scattering
  • Openloop TF
  • PZT TF
  • Noise measurement
• Epoxy cure bake at CIT
• Retest at CIT
  
  • ditto

WB 8 April or after

• Packing
• Shipping - Shipping box?
• Optical Testing at LLO (2 days anticipated)

[Koji, Jeff, Zach, Lisa]

We glued a test PZT-mirror assembly last week in order to make sure the heat cure of the epoxy does not make any problem
on the glass-PZT joints. The assembly was sent to Bob for the heat treatment. We received the assembly back from Bob on Wednesday.

We noticed that the assembly after the heat cure at 100degC had some voids in the epoxy layer
(looking like the fused silica surface was only 70% "wetted" by the epoxy).
The comparison of the assembly before and after the heat treatment is found in the slideshow at the bottom of the entry.

Initially our main concern was the impact to the control and noise performance.
An unexpected series resonance on the PZT transfer function and unwanted noise creation by the imperfect bonding may terribly ruin the IFO sensitivity.
In reality, after repeated poking by fingers, the PZT-prism joint was detached. This isn't good at all.
Note that there is no sign of degradation on the glass-glass joint.

We investigated the cause of this like:
- Difference of thermal expansion (3ppm/C PZT vs 0.55ppm/C fused silica)
- Insufficient curing of epoxy by UV (but this is the motivation of the heat cure)

Our resolution up to this point is to switch the glue to EP30-2. This means we will go through the heat cure test again.
Unfortunately there is no EP30-2 in stock at Caltech. We asked MIT to send us some packets of EP30-2.

Hardness of the epoxies is another concern. Through the epoxy investigation, we learned from Noliac that the glue for the PZT
should not be too hard (stiff) so as not to constrain the deformation of the PZT. EP30-2 has Shore D Hardness of 75 or more,
while Optocast UV epoxy has 88, and EPOTEK Epoxies, which Noliac suggested for gluing, has ~65. This should also be
confirmed by some measurement.  We will also ask Master Bond if they have information regarding the effect of curing
temperature on the hardness of the epoxy.  EP30-2 can be cured anywhere between RT and 200F (it's service range is up to 300F).
However, the entire breadboard, with the curved mirror sub-assemblies, will need to be baked at 110C to cure the UV Bond epoxy. 
We hope that exposure to relatively higher temps doesn't harden the EP30-2. The EP30-2 data sheet recommends an epoxy
thickness of 80-120 microns which is much thicker than we would like.

We also don't have a way tocontrol the thickness; though we could add glass spheres to the epoxy to control the thickness.
The thickness of the EP30-2 used to bond the metal wire guide prism on the core optics is much thinner at 15-25 microns.

[Koji Lisa Jeff Zach]

Eric G bought a UV power meter from American Ultraviolet.

Our UV illuminator was calibrated by this power meter.

The first blast (i.e. cold start): 3.9W/cm^2

After many blasting: 8.3W/cm^2

The spec is 20W/cm^2

[Koji, Lisa, Jeff, Zach]

Jeffs concern after talking with the glue company (EMI) was that the UV blast for the top side was not enough.

First we wanted to confirm if too much blasting is any harmful for the glue joint.

We took a test joint of FS-FS with the UV epoxy. We blasted the UV for 1min with ~15mm distance from the joint.
After the observation of the joint, we continued to blast more.
In total, we gave additional 5min exposure. No obvious change was found on the joint.

Then proceed to blast the OMC top again. We gave 1 min additional blast on each glue joint.

Locations of the curvature minimum on the OMC curved mirrors have been measured.

Motivation:

When a curved mirror is misaligned, the location of the curvature center is moved.
Particularly, our OMC mirror is going to be attached on the PZT and the mounting prism with the back surface of the mirror.
This means that a curved mirror has inherent misalignment if the curvature minimum of the curved mirror is shifted from the center of the mirror.
Since we have no ability to control mirror pitch angle once it is glued on the prism, the location of the curvature minima
should be characterized so that we can oush all of the misalignment in the horizontal direction.

Measurement technique:

When a curved mirror is completely axisymmetric (in terms of the mirror shape), any rotation of the mirror does not induce change on the axis of the refected beam.
If the curvature minimum is deviated from the center of the mirror, the reflected beam suffer precession. As we want to precisely rotate the mirror, we use the gluing
fixture for the PZT assembly. In this method, the back surface of the curved mirror is pushed on the mounting prism, and the lateral position of the mirror is precisely
defined by the fixture. As you rotate the mirror in clockwise viewing from the front, the spot moves in counter clockwise on the CCD.

Setup and procedure:

The mounting prism (#21) is placed on the gluing fixture. A curved mirror under the test is loaded in the fixture with no PZT.
i.e. the back surface is aligned by the mounting prism. The fixing pressure is applied to the curved mirror by the front plate
with spring loads. The mirror needs be pushed from the top at least once to keep its defined position in the fixture.
The incident beam is slightly slated for the detection of the reflected spot. The beam is aligned and hits the center of the mirror as much as possible.

The position of the spot on the CCD (WinCamD) is recorded, while the mirror is rotated 90deg at once. The rotation of the mirror is defined as shown in the figure below.
The angle origin is defined by the arrow mark of the mirror and rotated in clockwise being viewed from the front face. The mirror is rotated 540deg (8points) to check
the reproducibility.

Measurement result:

8 point for each mirror is fitted by a circle. The fitting result provides the origin and radius of the circle, and the angle correspond to mirror angle of 0deg.

Analysis:

d: distance of the curvature minimum and the mirror center (quantity to be delived)

D: distance of the prove beam spot from the center of the mirror

R: Radius of curvature of the mirror

theta_R: angle of incidence/reflection

The interesting consequence is that precession diameter (X-X') on the CCD does not depend on the spot position on the mirror.
This ensures the precision of the measurement. In the measurement, the radius of the precession (r = (X-X')/2) is obtained.

Therefore,

d = r R / (2 L)

Mirror name, distance[mm]
C1: 0.95
C3: 1.07
C4: 1.13
C5: 0.97
C6: 0.73
C7: 1.67
C8: 2.72
C9: 1.05
C10: 0.41
C11: 0.64
C12: 0.92
C13: 0.14

Resolution:
The angle to be rotated is depicted in the following plot for each mirror.

EP30-2 gluing test

[Jeff, Zach, Koji]

PZT assembly gluing

Glue gun -> to be returned to MIT
Fixtures x2
Al bases, spacers
spare screws
mirrors / prisms / PZTs
IPA bottle
clean tools x2
first contact kit
gloves (7.5)

[Zach, Jeff, Koji]

- Jeff configured the bottom side template to have a nominal value
obtained from the solid works model. Note that the thickness of the
curved mirrors are 6mm in the model. He added 0.3mmx2 to the dimensions.

- Jeff located the template on the breadboard such that each side has
the same amount of hanging out.

- Micrometer values

• The one closest to the input mirror (CM1) 0.07
• The other one on CM1 0.24
• The one closest to the output mirror (CM2) 0.17
• The other one on CM2 0.30

/------------\

0.17         0.07
\------------/
0.30         0.24

- Now the template is ready to accept the OMC optics.

 

- Zach and Koji finished a series of measurements for the test OMC.

Modulation depth:

- We scanned the laser PZT and recorded the data.
CH1: Reflection DC
CH2: PDH Error
CH3: Transmission (Magnified)
CH4: Transmission

- We should be able to obtain the estimation of the modulation depth and the finesse from this measurement.

- Rough calculation of the modulation depth is 0.19

Transmission:

- Incident 16.3mW
- Transmission 15.1mW
- This gave us the raw transmission of 92.6%ish.
- The modulation depth of 0.19 corresponds to 1.8% of the incident power
- The carrier reflection is almost dominated by the mode mismatch. (Note: We did not have a good resolution for the refl beam)  =>3.2%

- In total:The incident useful carrier power was 15.4mW ==> Throughput 98%
- There is slight headroom to increase the transmission by cleaning the mirrors.

FSR/Finesse:

- As our AOM is not functioning now, phase modulation sidebands are injected with the BBEOM.
- In principle, we can't expect any signal at the transmission at around the FSR frequency.
- If we apply small locking offset, the split peaks appear at the FSR frequency. The frequency of the dip corresponds to the FSR.
- We probably can extract the finesse of the cavity from this measurement. Lisa is working on this.

HOM/Finesse:

- The same PM injection gives us the frequency of the HOMs.
- We found that our EOM can work until ~500MHz.
- We could characterize the cavity resonance structure more than a single FSR.

[Jeff, Zach, Lisa, Koji]

Gluing of the cavity mirrors went very well!!!

Preparation

- Checked if the cavity is still resonating. => Yes.

- Checked the FSR: 264.251MHz => 1.1345m
  2.5mm too long => Move each micrometer by 0.625mm backward

- FSR&TMS (I)
  Aligned the cavity again and checked the FSR: 264.8485MHz => 1.13194m
  TMS(V): 58.0875MHz => gamma_V = 0.219324
  TMS(H): 58.1413MHz => gamma_H = 0.219526
  the 9th modes of the carrier is 9.7-10.4 line width (LW) away from the carrier resonance
  the 13th modes of the lower f2 sideband are 9.2-10.2 LW away
  the 19th modes of the upper f2 sideband are 0.3-1.8 LW away
  We found that this coincidence of the resonance can be corrected by shortening the cavity round-trip by 0.5mm

- Spot positions (I)
  The spots on the curved mirrors were ~1mm too much inside (FM side). In order to translate the cavity axis,
  MM2 and MM4 were pushed by θ
  θ/2.575 = 1mm ==> θ = 2.6 mrad
  The separation of the micrometers are ~20mm
  d/20mm = 2.6mrad ==> d = 52um

  1div of the micrometer corresponds to 10um => 5div = 50um

- Move the micrometers and adjusted the input steering to recover the alignment.

- In any case we were confident to adjust the FSR/TMS/spot positions only with the micrometers

BS1/FM1/FM2 gluing

- Aligned the cavity

- Glued BS1/FM1/FM2 one by one while the cavity resonance was maintained.
  FM2 was slipping as the table is not leveled well and the fixture was not supporting the optic.

- FSR&TMS (II)
  FSR: 264.964875MHz => 1.13144m (Exactly 0.5mm shorter!)
  TMS(V): 58.0225MHz => gamma_V = 0.218982
  TMS(H): 58.1225MHz => gamma_H = 0.219359
  the 9th modes of the carrier is 10.3~11.7 LW away
  the 13th modes of the lower f2 sideband are 7.4~9.3 LW away
  the 19th modes of the upper f2 sideband are 1.5~4.4 LW away

- Spot positions (II)
  Looked OK.

CM2 gluing

- Glued CM2. The mirror was supported from the back with allen keys.

- FSR&TMS (III)
  FSR: 264.9665625MHz => 1.13144m
  TMS(V): 58.1275MHz => gamma_V = 0.219377
  TMS(H): 58.0813MHz => gamma_H = 0.219202
  the 9th modes of the carrier is 10.2~10.9 LW away
  the 13th modes of the lower f2 sideband are 8.5~9.4 LW away
  the 19th modes of the upper f2 sideband are 1.4~2.7 LW away

- Spot positions (III)
  Looked slightly off at CM2. Pushed MM2 by 4um.

CM1 gluing

- Glued CM1.

- FSR&TMS (IV)
  FSR: 264.964875MHz => 1.13144m
  TMS(V): 58.06625MHz => gamma_V = 0.219145
  TMS(H): 58.08625MHz => gamma_H = 0.219220
  the 9th modes of the carrier is 10.8~11.1 LW away
  the 13th modes of the lower f2 sideband are 8.2~8.6 LW away
  the 19th modes of the upper f2 sideband are 2.6~3.2 LW away

- Spot positions (final confirmation)
  Looked OK. 

Final measurement

- After everything was finished, more detailed measurement has been done.

- FSR&TMS (final)
  FSR: 264.963MHz => 1.13145m
  TMS(V): 58.0177MHz => gamma_V = 0.218966
  TMS(H): 58.0857MHz => gamma_H = 0.219221
  the 9th modes of the carrier is 10.8~11.7 LW away
  the 13th modes of the lower f2 sideband are 7.3~8.6 LW away
  the 19th modes of the upper f2 sideband are 2.6~4.5 LW away

Final values for the micrometers

• MM1: The one closest to the input mirror (CM1) 0.78mm
• MM2: The other one on CM1 0.89
• MM3: The one closest to the output mirror (CM2) 0.90
• MM4: The other one on CM2 0.90

/------------\

0.90         0.78
\------------/
0.90         0.89

[Jeff Koji]

- Placed the optics on the PD/QPD path

- Checked the alignment of the beam on the dummy PD/QPD mounts

- There is a bit of (~0.5mm) shift of the spot position from the center. Mainly downward. This is well within a ball park of the PD mounts.

- The PD/QPD path gluing will take place tomorrow.

- Went to the 40m and received the DCPDs from Bob's lab.

- Took six ISC QPDs for the sake of the OMCs.

- They are now in the OMC lab. 

- Measured the B mirror / E mirror R&Ts.

- Found anomalously high loss (3%) for the B mirrors (BSs)

- Went through the all mirrors. Some mirrors (3 or 4) seemed less lossy (<~1%). They will be used for the DCPD BS.

Yesterday, all of the glass components for the QPD path were glued.

- Check the alignment of the beam with the cavity.

- Placed the prisms

- Placed the QPD mount for the gluing test. An alignment disk instead of a diode was placed on the mount.

- Checked the spot positions at the QPDs. A CCD camera with a lens was used to find the spot.
  The spots were ~0.5mm lower on the QPD1, and ~1mm lower on the QPD2.

- Glued the first steering mirror while the spot position was continuously monitored.

- Glued the BS in the QPD path while the spot position was monitored.

- FInally a glass bracket was glued.

- The spot on QPD2 was too low to absorb by the QPD shim.

- Once the steering mirror was clamped by a cantilever spring (to prevent slipping), the spot moved up a bit.
  (Or, we should say, the cantilever misaligned the optics a bit in pitch in a preferrable direction.)

- The other steering mirror is clamped by a cantilever spring (to prevent slipping), the spot moved up a bit.
  Or, we should say, the cantilever misaligned the optics a bit in pitch in a preferrable direction.)

- The last steering mirrors was also glued in a same way. As a result the spot is 0.5mm below the center of the alignment disk.

- Once the PD mounting brackets were glued, we can't place the QPD mount on it as the PEEK bar can't be inserted without moving the gluing template.

- The QPD mount with out the glass bracket was used to check the alignment of the beam dumps.
  As the beam dumps have a wide aperture and the yaw alignment of the QPD is big, we could accommodate the beams in the dumps easily.

- The dumps were glued.

[Jeff, Koji]

- While we were working on the optics alignment, one of the mounting brackets made of glass god tore apart into two when a holding screw was removed.
The glass component had a crack at the very middle of the part.

- We borrowed a setup for photoelastisity measurement from Garilynn. This is a set of polarizer configured to have cross polarization. If there is no photoerastisity
the image is colored in blue (somehow). When the polarization is rotated, the color is changed in red, yellow, or white.

- The cross polarizer was tested with a polycarbonate face shield for the UV protection. It seems doing its job.

- We took a set of photos to see any residual stress in a block. The entire inside of the channel is frosted glass so the technique didn't yield much.
In one orientation we did see stress near the ends but the orientation didn't allow us to see exactly where.

- We had 30 brackets and one OMC requires ten of them. This means that there was no spare and now we don't have enough.
  So we decided to spend more as test pieces.

- We tested three scenarios this afternoon. In all three cases both screws were snugged (estimate 0.5 in*lb) before torquing by a torque wrench with a dial meter.
  The divisions on the dial of the wrench are 1 in*lb. We were not so confident in the exact measurement but we felt good about the repeatability of the values.

  1. Duplicated the original mounting with the chamfers of the PEEK bar facing into the channel. Cracked as the torque wrench read 1 in*lb.
      Crack initiation at the first screw, starting along the longitudinal centerline.

  2. Turned the nut bar over so the flat side faced into the channel. Successfully torqued both screws to 1 in*lb and removed them.

  3. With a razor blade, made fairly large reliefs (countersinks) around the holes in the PEEK. Successfully torqued both screws first to 1 in*lb then 1.5 in*lb.
      The block did crack (again at the screw along the centerline) when the torque was ~1.9 in*lb.

It occurs to us that we need micro-compliance AND structural rigidity to distribute the load. The PEEK bars are small and particularly thin where the #4-40 helicoil holes are.
The load is probably concentrated way too much at the holes because it is too weak. Perhaps a good solution, among others, would be to use an aluminum nut plate
with a thin (.02") kapton or viton layer to give the micro-compliance. Additionally, a kapton layer could be used between the block and the aluminum shim,
though this one is probably to be avoided so as to ensure rigidity of the bolted assembly to the bench. Lastly, the nut bar should be shaped such that the area
around the holes and the end of the channel (pretty much the same area) are less stressed than the center portion. 

After the discussion with Peter and Dennis, we decided to reinforce the bonded glass piece with invar shims.
Each shim will be threaded such that we don't need to stress the glass piece any more. EP30-2 will be used as the glue.

[Jeff, Koji]

DCPD path gluing

Usual preparation

- Locked the cavity.

- Aligned the input beam to the cavity

DCPD BS gluing

- Placed the DCPD BS on the breadboard

- Placed the dummy DCPD mount on the reflection side of the BS. Check the height and position of the spot.

- Placed the dummy DCPD mount on the transmission side of the BS. Check the height and position of the spot.

- The spot positions looked fine.

- Added a dub of UV glue on the BS. Placed it along the fixture.

- Checked the reflection spot again with the CCD. Kept monitored the spot position through out the gluing process
of the BS.

- Blasted the UV illumination

Reflection side beam dump gluing

- Replaced the alignment disk of the dummy DCPD with a photodiode with the cap removed.

- Put the dummy DCPD mount and the beam dump in place

- Checked the reflection spot from the diode on the beam dump. It looked fine.

- Applied 2~3 dubs of the glue on the beam dump. Slid in the dump to the fixture.

- Applied UV illumination. As the beam dump shadows the illumination 3 times of 10sec blasts were applied.

Transmission side beam dump gluing

- Put the dummy DCPD mount with the diode in place

- Put the beam dump in place. The template needed to be lifted up a bit to accomplish this action.
This should be fixed by the modification of the template.

- Checked the transmission spot on the diode and the spot reflected from the diode on the beam dump.

- Actually the spot was too much close to the vertex of the "V" on the beam dump. We determined that
this was mainly caused by the misalignment of the diode element, and can be compensated by the tilt of the diode mount.

- Removed the beam dump from the template once. Applied 2~3 dubs of the glue on the beam dump.
Slid in the dump to the fixture by lifting up the template again.

- Applied UV illumination. As the beam dump shadows the illumination 3 times of 10sec blasts were applied.

Mounting bracket gluing

- Glued the mounting brackets for the DCPD mounts based on the positions specified by the template.

Removing the templates

- Removed the connection bars between the two templates.

- Removed the template at the QPD side. The screws at all of the three sides were needed to be released in order to accomplish this action.
Once the screws are released, the template was slid on the breadboard so that the pads did not scratch the optical surface.
Keep one side of the template use as a pivot, lifted up another side until the pads clear the optic. Then lifted up the other side.

- Removed the other template. This time, the screws at the two DCPD sides are released. The template was slid and lifted in a same way.

Last beam dump gluing

- Once the QPD side template was removed, the last beam dump at the transmission side of the first steering mirror was glued.

- This has been done without any gluing fixture, we held the beam dump with clean Allen keys on the breadboard.

- The paths for the main and stray beams were confirmed by an IR sensor card, and blasted the UV.

Closing the transport fixture

- Removed the constraining pins for the breadboard.

- Made sure all of the constraining pins/screws are released for the other side of the transport fixture were released.

- Put the lid on.

- Fastened the constraining pins/screws of the transport fixture.

- Wrapped the fixture with sheets of the Al foil.

- Pack the fixture in anti-static bags.

L1 OMC is back on the table for the action next week.

May
(done) Mon  6th: Invar plate arrival / Spot position measurement
(done) Tue  7th: Invar plate cleaning / Spot position measurement / EP30-2 arrival / Invar plate gluing to the test mounting brackets
(done) Wed  8th: Invar plate cleaning done / Baking of the test pieces (with Bob's oven)
Thu  9th: ***After bake torque/force test***

***If the invar plate passes the test***
Thu  9th Light side invar plate gluing
Fri 10th Cable side invar plate gluing

Mon 13th The OMC given to Bob (Air bake & Vac bake)

Mon 20th The OMC received from Bob
         Apply First contact
         Diode mount adjustment / Electronic tests
Tue 21st Diode mount adjustment / Electronic tests / Optical tests
Wed 22nd Final cabling (***Chub***)
Thu 23rd Final cabling / Packing
Fri 24th Packing / Shipping

Mon 27th? Arrival to LLO / Koji fly to LLO
Tue 28th Test on the optical bench
Wed 29th Test on the optical bench
Thu 30th Suspension test? (***Jeff B***)

June
Tue  4th Suspension test done?

The invar reinforcement shims were glued on the glass brackets on the breadboard.
We worked on the light side on May 10th and did on the dark side on May 13rd.

U-shaped holding pieces are used to prevent each invar shim to be slipped from the right place.

We are going to bring the OMC breadboard to the bake oven tomorrow to cure the epoxies and promote the outgasing.

May
Tue 14th The OMC given to Bob (Air bake & Vac bake)

Mon 20th The OMC received from Bob
         Apply First contact
         Diode mount adjustment / Electronic tests
Tue 21st Diode mount adjustment / Electronic tests / Optical tests
Wed 22nd Final cabling (***Chub***)
Thu 23rd Final cabling / Packing
Fri 24th Packing / Shipping

Mon 27th? Arrival to LLO / Koji fly to LLO
Tue 28th Test on the optical bench
Wed 29th Test on the optical bench
Thu 30th Suspension test? (***Jeff B***)

June
Tue  4th Suspension test done?

The OMC is in the air bake oven now.

The OMC came back to the table again.

No obvious change is visible: no crack, no delamination

The OMC was fixed on the table and the beam was aligned to the cavity

- The wrong Mighty Mouse connectors for the PZT wires were prepared. The correct ones are in the vacuum oven till Tuesday morning.

- The thread holes for the cable pegs are 1/4-20 rather than 10-24.  This requires re-machining of the cable pegs & the C&B.

- We are waiting for the fast shipment of the from LHO

May
Thu 23rd Diode mount adjustment / Optical tests
Fri 24th Optical tests
Tue 28th Mighty mouse connector available / Diode mounting finalization
Wed 29th final check
Thu 30th shipment
Fri 31th

June
Mon  3rd ? Arrival to LLO / Koji fly to LLO
Tue  4th Suspension test done?