Removed optics for pointing into Ref Cav. Parts are stored in boxes temporarily on the PSL table, because the cabinet is full. The AOM and one BS cube are still bolted on the table, under ameristat, because I don't feel comfortable leaving them in boxes. Optics on the other side of the Ref Cav are still in place, but will hopefully be removed next week.

Dani, Corey to build more laser safety walls

Kyle, Corey, Ski preparing to remove HAM1 door

Gerardo to Mid-Y

~12:15local - Jodi, Kyle, Corey, others to HAM1 for door removal and clamp down of optics

13:20local – Michale R. out to H2 PSL to remove optics

13:30local – Dani, Sigg to Mid-Y to add squeezer lasers 

13:40 – truck delivery for Dani – installed a new cabinet shortly thereafter

3:15 – Dani and Jonathan B. to End X to turn on the P-cal laser.  
End-X station is now the only laser-hazard area on-site

~3:30 – Mike L. and Patrick out to LVEA to lock down MMT1, MMT3, and SM in HAM1

The lockdown of the HAM1 optics continues at 4:15 local

Corey and I set up the temporary walls that will isolate the first phase of squeezer work being done in what I've tentatively named the East Bay Lab (EBL), to distinguish it from the squeezer setup that will move out of it after a few months. This area near HAM6 will potentially be used for ALS work after the squeezers are done with it.

There is no operating laser currently behind the walls, so it's okay to walk back there without laser glasses. When we get to the stage where it becomes a laser hazard, the area will be properly marked, and a work permit and notification e-mail sent out. At that time access will be restricted to those trained on the squeezer setup.

Note that the walls are not solid and are supported by tent-like poles. It's possible to knock them over by hitting them. Since they're all connected to each other, this can bring down the whole setup. We're looking at securing them to the floor, but in the meantime please be careful.

In an effort to get the vault seismic data back on the web.  Cyrus and I have been working on the network to the vault.  We have confirmed that the network fiber transceivers are functioning so the problem has to be with the Quanterra computer.  This should not be too much of a surprise it has been running since 2000 in and environment that is not the best for computers.  I have pulled the computer from the vault in an effort to get it repaired.

These are not the channels that are in the DAQ.  Those channels have been routed to the mid station and have other problems.  COIL_MAGX is not functioning.   Looks like a connection issue somewhere.  Vault SEIS_Z is missing a gain of 10.  This is an artifact of the 110B that we just do not understand fully.  We will continue to work this issue.

Balanced and aligned the Main Chain of Quad-2 by raising the blade tips on the Top Mass and the UI Mass. Had to reset one of the Blade Clamp units, because the blade was touching the Z-Tip Adjuster and the blade tip was still low. Leveled the Main Chain Top Mass and UI Mass with a bubble level. The Test Mass is still about 1.5 – 2mm low.
 
We removed the Penultimate and Test Masses from the Reaction chain to adjust the weights to account for the heaver glass masses. Increased the weight of the Test mass to 26130g and lowered the weight of the Penultimate Mass to 53139g. The combined weight for the Main Chain Penultimate Mass and Test Mass is 79268g and 79269g for the Reaction Chain. 

The Reaction Chain masses have been re-suspended and we are going through the balancing and alignment procedure.     

1630 - Used heat gun to thaw econimizer valve, closed adjuster screw full cw then backed out 7 full turns ccw.  Verified flow still present out silencer

Contractors moving equipment from EY to EX
Pacific Industrial on site
Overhead Door on site
Richard fixed ADCUEX, which was red
Betsy and Corey removed the bellows from HAM1 to ISCT1
Cyrus power cycled the NPT, which took the DAQ out for a few minutes
Oscar baling on X-arm
Richard re-routed vacuum connections, which took the LVEA vacuum channels out for a few minutes
John and Mike L. installed a sock over the HAM1 chamber

Found Y-end QDP80 with "low N2 flow" alarm -> Investigation shows low pump shaft N2 flow due to near zero vapor pressure at LN2 dewar (pump shaft purge utilizes LN2 dewar boil-off which is nominally 10psi N2) -> "Economizer" valve (a.k.a. pressure relief valve) for this dewar has a history of sticking open and closed - see ilog entries from Jan. 2010 -> frost indicates economizer plumbing is flowing -> Turned adjuster screw 1 full turn cw -> will hold-off on continuing pumpdown of Y-end until normal shaft seal protection (flow) can be demonstrated.

Kyle- Removed all but minimal bolts from HAM1 east door

Kyle- vented Y-end

Kyle, Ski- removed BSC10 south door.  Then rehung door. 

Kyle-torqued door and pumped Y-end to 6 torr -> valved out pumps for the night will resume tomorrow.

0847 - Door ajar at EY, ok.
0930 - Mike L. gives tour of LVEA to visitor
0957 - Ryan and Joe from LLO arrive.
1000 - Richard and Cyrus at MX.
1026 - Kyle at EY, working on instruments there.  Ignore vacuum alarms from EY.
1111 - EY SUS watchdogs begin to fire off
1250 - Door Forced, LVEA
1315 - Chris and Derrick from Apollo arrive
1345 - Gerardo heads to MY to drop off boxes
1400 - Noticing white pickup truck working on radio transmitter on Rt. 10 just past the driveway
1405 - Richard heads out to Vault
1405 - Cyrus out to MX
1456 - EY Optic Lock-Down Complete (Ski)
1503 - Door Forced, LVEA
1535 - Swagelok doing inventory work

Removed the Main Chain Penultimate and Test masses from Quad 2, and increased the static weight of both to 39634g. Reinstalled the masses and are going through the rebalancing alignment process.      

Door off ~2:00PM
Placed the ETMy on EQ chamfer stops
The 4 (AR side) chamfer EQ stops were tightened to capture the ETM against the front 4 (HR side)chamfer stops.
Magnets remained well centered in the OSEMs.
The HR face of the optic was very pristine as was the transmon telescope large optic.
The chamber floor had a few bits of AL foil and a couple of white cotton like fuzzballs.
Door back on by 3:00PM

Finally got the support code for the weather stations, dust monitors, motor controllers, video and projector controls checked out of svn and compiled. Had to tweak the dust monitor code as expected. Had some weird issues about the paths in the dust monitor target directory. I'm not really sure how it was running at all from there before and it isn't now. The $TOP path used in the st.cmd shouldn't have existed the last few times I restarted it, but didn't seem to notice that until after I changed its support libraries to the svn checkout (which should have nothing to do with it). Anyway, the new code is running out of my home directory until tomorrow, when I can update the target directory. Note the running state of code for the weather stations, dust monitors, video and projector controls has been in differing states all late morning to evening. The laser power motor controllers are still down.

Eric A., Hugh R., Jim W., Jeff G.

This afternoon we began flushing out our first HEPI actuator on the HEPI test stand.  The procedure is to "bleed" the actuator valves with HEPI fluid for ~24hrs (and rid them of air), then actual testing can begin.  Jim W., Hugh, and Eric modified our side plate that diverts flow into the valves with very good results.  The new plate barely leaks fluid (minor oozing of fluid after ~30min).  

First pic is the actuator/hose set-up after we began flushing.  Second pic is the modified side plate.  The idea is to have the triangle-shaped O-ring encompass the three holes at the vertices.  

Fluid is currently flowing at ~62 psi.

Kyle- Y-end - Started purge air, closed GV18,started MTP and QDP80 pumps.

Worked on alignment and tuning of the AOSEMs in Quad 2. It is a time consuming and rather tedious process, with waiting for the suspension to quiet down between adjustments. The glue on several of the steel inserts, which hold the magnets in place, did not set well. This permitted the steel insert to come loose, allowing the flag to fall off or become misaligned. We will check these on next batch of flags just coming out of the oven. I am working on a short set of procedures for tuning these OSEMs.        

Today's random list of notable events:

 Cleaning at EY/EX in preparation for vent (Terry/Christina).
 Vacuum system pumps running at EY in preparation for vent (Kyle).
 Restoration of (some) vault channels, others to be investigated later (Richard).
 General Tuesday maintenance contractors/vendors on site.
 One pallet delivery to LSB (Gerardo), and one pickup (Richard).
 h1adcuex CPU has failed and will require replacement (Richard).
 Other scheduled tasks not listed here.

Did not succeed. For some reason my compiles are deleting the object files and then complaining that they're gone. I don't know what is going on, so I copied the old code back for now. I restarted everything except the motor controllers, since we are not using them for awhile.