Ran well pump to fill tank.

This week Marielle is here from Glasgow to help us bond ears and glue prisms and magnet flag mounts to the ITM and ETM PENs.  We have 4 of each PEN types (although they are physically and functionally the same) in house.   Note:  The serial numbers transcribed here are for PENs only, although they are labeled the same as Test Masses.  This does not imply any matching of specific PENs to specific TMs, just an unfortunate naming convention of these PENs early on.  Marielle hopes to have 4 PENs with ears by the end of the week.  Having a bit of a late start and a short commissioning phase in the LSB bonding lab this week, yesterday ITM04 (which had ears bonded last Sept during Marielle's last trip) had sapphire prisms glued to it.  As well Gerardo and Marielle bonded the first ear to ITM01.  Today, we glued the magnet flag mounts and 416 SST disc insert to ITM04, and are working on bonding the second ear to ITM01.

Mayflower arrived Wednesday to pick up the IO tubes for scrap.  One tube was loaded into their truck and departed the site.  They will be back next week for the second one.  many joined the sendoff and copious pictures were taken.

[Corey, Jim, Mitch]

Today we started partial disassembly for the HAM-ISI (assy #3) which had been stagnantly stored on the Test Stand for the last few months.  Today, parts loose Class A parts were removed off the ISI & stored.  The Optics Table was removed (laid down on the Assembly Stand in the same cleanroom;  will forklift to the other clean room's Test Stand for storage), and ONE of the Springs was released (the other TWO are ready to be released first thing Thurs morning).

Clean room construction in the north end of the LVEA continued, with Ken doing some of the electrical work.
HEPI installation at BSC7 continued.
The H2 IO beam tubes were picked up for recycling.

changed filters in AHU4(Office air handler).

[Corey, Dave, Eric, Hugh, Jeff, Scott]

NE Pier

Most of today was devoted to installation of the Vertical Actuator.  This Actuator gets installed after the HEPI assembly is in place.  Once the HEPI assembly is in place and connected (via HEPI Foot) to the Crossbeam, the Vertical Actuator can be installed.  The Actuator has been tested and flushed at this point (i.e. it contains "HEPI fluid").  Before the Actuator is craned into place, inlet/outlet hoses are connected to the Actuator, filled with fluid, and then capped off.  At this point, the Actuator was carefully craned into place (see photos).  We have a fixture (yellow item in pictures) which holds the Actuator and allows installers to tilt it as it gets installed.  At this moment, the Actuator is in place and resting on it's Unified Actuator Brackets (they aren't torqued down to the HEPI Assembly).  Only one HEPI Assy Stiffener was re-installed.  The Support Bracket will need to be removed for the other one to get installed.  The Actuator has also not been connected to the Foot on top.

SE Pier

iLIGO Coarse Actuation System stack has been removed.  Marks have been made on the Pier (holes can be drilled out tomorrow).

Misc.

As we've worked we've found that the Support Brackets needed several modifications due to interferences or non-fits.  Sections of the Bracket have been cut off, and slots have been made longer.

Cut out was also made to the yellow Actuator fixture to prevent rubbing against a valve.

Activities in the LVEA throughout the day:
Cleanroom assembly work throughout the day
HEPI pier and actuator install on BSC7

Other On-site Activities:
~9:00 - ACE on-site to work on plumbing

 ~9:30 – Paradise water delivery

11:15 – wood recyclers on-site

~12:00 - on-site to see Bubba with Apollo for some sheet-metal work

12:30 – wood recyclers returning the box 

~1:00 – Swagelok delivery for Hugh

~2:30 – Kyle begins to plumb in mechanical level gauges in parallel to existing level transducers at Y-mid.  This work will take approx. 2hrs.

~3:30 – FedEx delivery for Bubba of Apollo.

Kyle's work will continue tomorrow morning.
The HEPI installation continues at the end of the ops shift at 4:00pm local.

To work on quad #3, we restored the last quad settings from

/data/autoburt/2011/02/09/17:01/l1qtsepics2011020917:01.snap

The last BS/FM settings are at /data/autoburt/2011/03/08/12:01l1qtsepics2011030812:01.snap . We are going to restore the quad set from a previous log entry.

Ran well pump to fill tank

CoreyG EricA HughR

We drilled and Tapped the additional holes needed on the NE Pier at BSC7--pretty straight-forward.
We ran into an interference between the HEPI Housing Frame and the Crossbeam Support Bracket.  We are making some mods to the latter to deal with that.
We got the Housing in place by hanging the Crossbeam from the Crane and then getting the Support Bracket out of the way.
We used a 1/2" shim (D030700) between the Crossbeam and the Crossbeam Attach plate.  These components where very level wrt each other but we were unable to get all the Pier Mounting hardware installed.  So, we bolted the Foot to the Crossbeam and then released the Foot from the Caging Brace; we also released the Springs from the Foot.  We then moved the Housing to allow all the Mounting hardware to be installed.  Once the Housing was secure to the Pier, the Foot was recaptured by the Caging Brace and then the Springs re-secured to the Foot.
The Foot 'Toes' don't have a lot of extra room between the Housing.  We got some photos to document this.

Tomorrow, Actuators and Stiffeners and Pier #2.  95 to go!
Will attach some photos tomorrow.

- John Worden convened the morning meeting.
- Jodi Fauver reports that the results of the Astro Pak cleanness tests were very good.
- Terry Santini / Doug Cook declare that the LSB Fiber Lab area is now a clean (garb-required) area, and is signed accordingly.
- Work at BSC7 on HEPI installation.
- Surveying by H2:PSL area for HAM transfer.
- Swagelok delivery for Hugh Radkins.
- EX and MY are in a "rough vacuum" for BSC transfer.
- New cubicles being installed in OSB, CAD workstations moved to the east cubicle farm in the OSB.

[Corey, Greg, Hugh, Jeff G.]

After Scott & Dave did some surveying of the Support Tubes of BSC7 this week, we were happy with the Support Tube elevation and ready to start installation work for HEPI.  Today, we:

• Installed Dial Indicators on the ends of the Support Tubes (they reference off the "Accelerometer Plates" bolted on ends of Support Tubes). 
• Installed Support Brackets on each Pier (and eventually bolted to the Crossbeams)
• Removed the iLIGO Coarse Actuation stack on the NE Pier.  We also made marks on the top of the Pier so we can drill some holes in it for the upcoming HEPI installation. 

On Monday, we will drill holes on the NE Pier, install NE HEPI Assy, and then repeat this process for the other three HEPI locations.

• Surveying work in LVEA
• Deliveres at warehouse, no clean room yet
• Demolitions in Hanford area took down water tower and smoke stacks, visible (we think) on our seismometers

Dale shot this curvilinear representation of the LVEA H2 diagonal section showing the absence both input and output mode cleaner tubes, as well as the (temporarily) relocated HAM11 chamber.  HAM11 moves downsteam of HAM12, and is renamed HAM12, in aLIGO.

H2 Input beam tube removed from LVEA.
HAM6 survey work.

I have changed the holding time to 1 minute and the sampling time to 1 minute for all the dust monitors in the LVEA in an attempt to resolve a problem with them getting stuck on hold.