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.

(Corey, Greg, Mitch)

Stabilizing 200lb Masses

Vince noticed some ugliness in the transfer functions for #1 on the LVEA Test Stand.  With the big (200 & 600lb Leg Elements) masses on top of the assembly being a possible suspect, we took a look at these masses.  With the layout we have on top (see attached photos), we observed that the 200lb masses were not very secure on the table (none of these masses are bolted down, but we thought gravity would be enough to keep them secure);  one could easily rotate or "teeter" these masses where they were. 

So yesterday (Wed), we went in and lifted the 200lb masses and slipped shims under them so they would have 3-pt contacts under them.  We did this for both 200lb masses (using two different types of shims for each mass; see photos).  This noticeably secured the masses much better.

Notes: 

1) These masses are a different set from the ones used for testing in the Staging Building.

2) This morning Vincent informed me the transfer functions haven't changed much.  Perhaps we'll have to put shims underneath the 600lb masses next, or look somewhere else for noise issues.

Re-balance Of System

After work with the weights above and adding of shims, went about re-balancing of the ISI.  With this sort of re-balance, we look at the Stage1-2 Vertical Capacitive Position Sensors (via Voltmeters plugged in to them).  We adjust the payload until we can get the Sensors to have voltages of +/-0.500V (where a negative value means the gap is small...in other words the corner for this sensor would be low).

After several iterations, the best we could manage was the following:

Corner 1 (~crane east):  -0.375 V

Corner 2 (~west):  -0.340 V

Corner 3 (~south):  -0.545 V

Corner 3 was the tough one, and this was the closest we could get to under +/-0.500V (see attached photo for locations of trim masses).  Overall we're low (perhaps due to the added shims).

Noting Serial Numbers

Keeping track of sensors (i.e. Capacitive Position Sensors, GS13's, L4C's, Trilliums) is becoming a bit of a bear.  Since we are ready to install sensors on BSCISI#2, and I didn't really have a grasp of where every sensor was, I went ahead and noted where sensors on #1 were and their serial numbers (well, only for those which had S/N's viewable. 

For podded seismometers, I believe we are noting s/n's by the numbers scribed on the actual pod (vs the actual s/n of the seismometer inside or the "base" flange of the pod).  Here is what we were able to note for s/n's on BSC#1:

L4C S/N's

Corner 1 Vert:  155

Corner 1 Horiz:  22

Corner 2 Vert:  151

Corner 2 Horiz:  152

Corner 3 Vert:  153

Corner 3 Horiz:  150

GS13

Corner 1 Vert:  76

Corner 2 Vert:  84

Corner 3 Vert:  98 *

* NOTE!  This is the one which exhibited issues and needed to be opened up to repair it.  It's good for testing, but needs to be replaced with another GS13 before this ISI is installed in the Vacuum System/BSC Chamber!)

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

We started the morning making an initial assessment visit into the BSC-7 dome where we took pictures, figured out how to "grid" the dome for documentation purposes, and took some particle counts. The dome walls appear to be quite clean (nothing comes off the wall onto gloves) but the surface is rough enough to "cling" to a ConTec when one is used. The welds (seams and stitches) have a "sooty" residue that comes off on light contact with gloves. 

We asked John and Bubba to come out and take a look at ventilation and recommend a means of improving air flow. We'll remove a blank conflat tomorrow morning so that the dome has some internal circulation. 

After lunch, Rai "bunnied up" for visit into the chamber and the dome. Then, the crew completed the wipe down of the chamber floor and took the last of the FTIRs, which were sent off to JPL. 

• Shims added under masses on BSC ISI
• Ski to outbuildings checking water levels in tanks
• Chamber cleaning at BSC7

A new version of the "prepare quad" script is uploaded to the SVN:

/ligo/svncommon/SusSVN/sus/trunk/QUAD/H2/ITMY/Common/MatlabTools/Prepare_ITMY_20110727.m

The script uses caput to change the state of the switches to our "Known Good Starting State" conditions.

The only hard-coded part is on Line 22:

optic = 'ITMY';

Please change to whichever "optic" (i.e. ETMY, ITMY, ETMX,ITMX) you are using it for and update any vales as necessary. Then save in whichever directory is appropriate for the optic you are working on.

0817 - Praxair arrives
0845 - H2-PSL work on Diode Room enclosure begins
0900 - RichardM at EX testing dust monitors, affecting weather stations and systems there
0930 - Paradise Water arrives
0945 - GregorioT at MY
1110 - Nor-Cal visits Hugh
1125 - MichaelR in Diode Room
1251 - Betsy and Richard out to SUS stand in LVEA
1300 - Rai Weiss lecture: "Introduction to LIGO"
1500 - EY, LSB Fiber Lab, LVEA entrance alarming erratically
1600 - Keita begins transition to Laser Hazard
1615 - JonathanB to EY to check Pcal stand
1645 - LVEA in laser hazard (PSL contractors are done)

All the H2 front end and DAQ software are recompiled using the latest tag-2.3 version of the Realtime Code Gen system.

All IOP and user models were recompiled.

All frontends and DAQ computers were rebooted to install the new software.

The H2 DAQ framewriters were modifed to write frames following the aligo naming standard

H-H2-[R,T,M]-{GPS}-{SIZE}.gwf for RAW, SECOND-TREND and MINUTE-TREND respectively.

So for example the file H-R-994483200-32.gwf becomes H-H2-R-994483200-32.gwf

All existing frame files were renamed on both fw0 and fw1 systems.

Spool connecting BSC5 to GV15 will be removed soon.  Need to decouple annulus plumbing from spool-to-GV15 flange, requires venting GV15's annulus volume, this volume has never been vented, don't know if inner O-ring(s) will leak into CP6/X2 module ->  First I isolated the ion pump body from the rest of the annulus piping, then I shut down the aux. pump cart connected to but isolated from GV15 and changed the setpoint at which the turbo starts to a value below what the diaphram backing pump could achieve.  Next I started the pump cart and let the pressure come down to the ultimate pressure of the diaphram pump (~1.5 torr).  Next, with Gerardo monitoring the pressure in CP6/X2 module, I valved-in the pump cart into GV15's annulus and Gerardo confirmed that CP6 pressure was unaffected.  Now I opened the orifice (vent port) and the hanging turbo which resulted in the annulus volume settling in to around ~200 torr.  Still no change in adjacent volume pressure.  Finally I shut down the aux. cart and let the annulus volume fully vent -> No leak.  

Decoupled piping from spool flange and blanked-off both (decoupled) flanges -> Pumped GV15 annulus volume with pump cart, opened pump body to rest of piping and restarted ion pump.  Isolated pump cart from annulus.

Removed RGA from BSC5. Now Apollo can remove spool from between BSC5 and GV15