- CarolW and FredR presiding over INS today
- ICC: Dome being returned to BSC7
- Drilling and grouting at MX for spool placement.  Shooting for Wed. (transmission of rental forklfit burned out).
- Reminder about aLOG rule regarding conflat flanges
0810 - Cardboard recycling truck returns with covered bin
0815 - Reibold arrives to work by H2 Diode Room
0852 - GregorioT at MY
1300 - LVEA to laser hazard for squeezing. IAS may begin work on Wednesday
1415 - Dale leads tour for two guests in LVEA
1500 - Patrick to EndX to install a dust monitor
1511 - GregM informs me that Oracle will deliver the tape library tomorrow (Tuesday)

I put the MetOne 227B serial number 980500281 at end X location 1.

R. Lane

H2 SUS ITMY R0 TF, round 2.

R. Lane

H2 ITMY M0 TF Round 1 Complete. Notice shift of third pitch mode frequency.

[This is work from Friday]

(Chris, Corey, Eric, Jeff, Joe, Jim, Mitch, Natalie)

Assy #2

Installed Trilliums

We don't have the called out 1/4"-20 x 3" bolts (they were used for Vertical GS13s on #1---because procedure erroneously called out 1/4-28 bolts...so the Trillium bolts for Assy#2 were used instead), but went ahead and installed/positioned these seismometers.  We had (1) 3" bolt and I used this to atleast check that it would thread into a couple of the holes for each Trillium (more 3" bolts are currently in a bake load).  We have 2.5" long bolts and may use them instead.  Here are where the Trilliums were installed:

Corner 1:  s/n 001

Corner 2:  s/n 24

Corner 3:  s/n 15

L4C Swap

Installed new & freshly leak tested pod.  Note:  These pods had noticeable Aluminum oxide particles/marks on them, and required a few wipes to remove the loose particles (but we couldn't get rid of all aluminum oxide marks). 

Corner 2:  Vertical L4C s/n 127  (replaced s/n X-45)

Don't have torque values for 10-24 generic bolt in our procedure so I went with a value of 22.8 inch-lbs obtained from engineersedge.com (these are bolts which are used to secure the Vert L4C down.

Installation of Remaining Capacitive Position Sensors (CPS)

Due to issues with soldering flux for some of our Class-A CPS's, we were short Class-A CPS's.  We are going to use some TEMPORARY Class-B CPS's instead (these are only to be used for testing, and must be removed before the system is installed in a BSC Chamber).

Flexure Serial Numbers

While we're at it, thought I'd also post the s/n's for the Flexures.  Note---these are the second set of Flexures installed on this assembly.  We installed a second set in the hopes of remedying the "twist" in the system we observed (it didn't help).  Here are the Flexures & their locations:

Corner1  
0-1:  s/n 142
1-2:  s/n 127
Corner2  
0-1:  s/n 144
1-2:  s/n 128
Corner3  
0-1:  s/n 133
1-2:  s/n 138

Assy#3

Plates removed from oven & some taken to Staging for helicoiling.

The main network connect at LHO is undergoing planned maintenance this weekend at pnnl.  The backup connection went down during this work.  It is back up as of 7:30 pacific.  The maintenance on the main connection is scheduled to complete 2pm pacific today.

Betsy, Lisa

Betsy and I tried to clean the silver coated primary mirror (D1000075-v1) of the H2 OAT Transmon telescope.

We did as follows:

1) Blow off the dust from the mirror
2) Soak the mirror (but not the surface) in DI water + 1% liquinox for about 10 minutes
3) Scrub the edge and the back with the soapy solution 
4) Remove the soap with DI water

At this point we noticed that the back surface and the barrel still had marks (I think they used a pencil or something similar to define the alignment reference lines before scribing them). So we decided to scrub with methanol to try to remove these lines. By doing that, we noticed that sticky brownish stuff remained attached to our wipes..(see picture). We locate the problem in the bevel at the edge of the coating. We continued to wipe down (kind of aggressively) until the wipes remained clean. So, we can summarize the procedure with:

5) Wipe down with methanol the barrels, in particular the bevel, and the back surface, until the wipes remained clean.
6) Sticky stuff were also present at the very edge of the surface. We removed them by wiping (more gently) with methanol
We might have removed some pieces of the small area at the edge of the mirror where the coating was damaged.

After that, we moved to the surface.
We tried to remove some of the particles on the surface by wiping down with methanol, but very gently, as we worried that we could damage the coating. We are sure we removed at least one spot, which made us think that these spots are not inside the coating. However, we can't remove most of them.

So, the message: we are ready to do an FTIR test on the substrate, to see how the cleaning went.
About the surface, we removed the dust, but we didn't really remove the spots that are there (only a very small fraction), and it is really hard to judge if wiping down with methanol really helps.


I brought Keita and Bram to look at the mirror, and we tried again, unsuccessfully, to attack some of the spots. By looking at the mirror with an inspection lamp showed greenish halos and thousands of spots all around the surface (those probably due to the coating itself).

So, the plan is to go on with the FTIR test. 
For the surface, probably the best idea we had so far is to leave it as it is. 

Construction of H2 PSL chiller room
Mid Columbia Forklift arrived on site
Boom truck rental delivery
Cleaning of BSC7 dome

We are proud to announce that we have finished vacuuming and wiping down the BSC-7 dome. Post-work FTIR samples have been taken and the conflat has been returned to its original location (or the nearest parallel dimension) and torqued down to spec. The dome is ready to be reattached on Monday morning.

R. Lane, A. Ramirez

Possible rubbing point on both M0 and R0. 

Took a while to get the adjustment shown below because:
* Very little room to fit your hands in to make adjustments
* One cam on every OSEM position adjuster plate is almost touching (the pitch adjuster I think?) and so you cannot get the long socket we normally use for adjusting the Top Stage OSEM adjuster plate cams onto it.
* Not enough adjustment range to properly position the OSEM adjuster plate
* We are using cams, which limit your ability to adjust the plate in a controlled manner in any direction

Also, cannot visually check to see if the PUM OSEMs are rubbing or not:
Using a flashlight you can see through the little hole in the end of the OSEM and see the tip of the flag moving around. Cannot see the edge of the OSEM body to see if the flag is touching or not. They did not appear to be moving as if they were touching when I checked.

The damping loops have been closed on the ISI-BSC8 using the experimental model. Before setting up the damping filters, actuators and geophones symmetrization filters were also installed. No time was spent on tuning. All damping loops have the same poles and zeros. Powerspectra when the ISI is non-controlled and controlled can be found at:

https://svn.ligo.caltech.edu/svn/seismic/BSC-ISI/H2/ITMY/Data/Figures/Powerspectra/Damping/
Matlab:
LHO_ISI_BSC8_Powerspectra_CT_ST1_L4C_Undamped_Damped_2011_07_29.fig
LHO_ISI_BSC8_Powerspectra_CT_ST2_GS13_Undamped_Damped_2011_07_29.fig

PDF:
LHO_ISI_BSC8_Powerspectra_CT_ST1_L4C_Undamped_Damped_2011_07_29.pdf
LHO_ISI_BSC8_Powerspectra_CT_ST2_GS13_Undamped_Damped_2011_07_29.pdf

The crew spent the morning staging around the BSC-7 dome by craning a garbing-staging cleanroom, a couple of staging tables, the external purge air unit and the HEPA filter into position. A variety of other paraphernalia was transported as well. After lunch, Mark L. and Zack "bunnied-up" to start work on the dome. They removed a large conflat (preserved in Class A condition) to allow better air flow inside the dome. Mark took and Zack recorded five FTIR samples. Then, Mark proceeded to vacuum the welds. He got about 3/4 of the upper half completed.

	(Corey, Greg)

	Yesteray it was decided we would go ahead and install the (6) GS13's which are NOT vacuum-ready (basically they can only be used for testing and then need to be pulled out and exchanged with GS13 Pods that pass a leak check). 

	This afternoon we spent roughly a half day installing (3) of the horizontal GS13's.  I had not done this before, so I had to remember how we did it on Assembly#1 and also had to deal with an out of date assembly procedure (and a drawing which had a few errors).  Now I don't remember Tooling being used for installation last time, so we went ahead and manhandled these horizontals in.  It wasn't too bad, as I moved them in to place and Greg would secure them on to the assembly.

	Here are notes for each GS13:

	Corner #1

	Horiz S/N 37 (not vacuum-ready, must be replaced!), and we used (2) of the thick Mizumi washers for shimming the Stabilizer Plate

	Corner #2

	Horiz S/N 14(not vacuum-ready, must be replaced!), and we used (1) thick  & (1) thin Mizumi washer for shimming the Stabilizer Plate

	Corner #3

	Horiz S/N 27(not vacuum-ready, must be replaced!), and we used (2) of the thick Mizumi washers for shimming the Stabilizer Plate

	Note:  Didn't  get to torque the 5/16 bolt on each assembly which is on the flange base and closest to the center of the ISI (the nearby actuator was in the way for our socket, and we only had one type of 1/4" socket to work with.  Need to figure out a way to torque these down.

Corey and I shot levels with the Sokkia Optical Auto level.

Attached is my logbook page.

Bottom line, the top of the Stage0, at the Alignment/Assembly Posts is level <.2mrad and,

the Optical Table is level to 1/8mrad as well.  The level requirement given to me by IAS (Doug & Jason) is 0.4mrad so we are comfortably under that.  So no fussing with the MTS with the ISI on top.

throughout the day:
HAM HEPI install work at HAM 7

cleaning by BSC 7

staging for BSC extraction at Mid-X

OpLev testing at Mid-Y by Gregorio, Walter

End-Y External Seismic work - HEPI hardware installation, prepping BSC chamber for HEPI and upgrades.

Vacuuming in the Beer Garden

Kobelco unit experiencing low output pressure alarms -> Discovered that the Left drying tower pneumatic valve located between the tower and the exhaust muffler was stuck in the open position.  I closed it with a wrench (flats on position indicating shaft) and then watched it for three drying/regenerating, i.e. close/open, cycles.  Seems to be working now.  We have replacement parts on hand in the event that it acts up again.  

Took some ITMY R0 TFs. Results Below for review.

Jason and I sorted through the existing iligo survey monuments to determine any that may be useful for aligo. We have put a plan together to establih where new additional monuments need to be placed. Jason is building spread sheet to compile this information. We reviewed tooling requirements and vacuum equipment spools that need to be removed at various stages of alignments. The spread sheet will describe the monuments to be on each stage of alignment. We will have a 3D model to depict this information as well.

The LHO aLOG and the aLIGO project wiki will receive a security update today at 1pm Pacific [3pm Central, 4pm Eastern].

The update will require users to log into the systems again.

Users are advised to save their logbook and wiki entries prior to 1pm pacific [3pm central, 4pm eastern] to avoid losing them.  Users who are simply reading the aLOG should notice no interruption.

This message will be repeated in the LHO aLOG.  I will post a comment to the aLOG when the update is completed to avoid spamming lsc-all.
--
Jonathan Hanks
General Computing Sys Admin
LIGO Hanford Observatory