Updated the software for the EPICS/TwinCAT gateway to the most recent version. Also, loaded the most recent SYS and PLC code.

(Cheryl, Corey, Jodi, Justin)

There were ambitious thoughts of trying to get the TMS mounted on the ISI this week, but even with tons of people, I don't think it would have happened (unless we worked into the wee hours on a lonely Friday night). 

Where we're at:  The TMS was roughly completed over a week ago.  It was then handed over to Arnaud (Mr. SUS) and he ran transfer functions to assess the mechanical functionality of this newly-assembled TMS.  Over the day/days he had it, he deemed it good to go---meaning it was good to decouple the ISC Table/Telescope Assy from the Upper Mass & move both assemblies to the ISI in the VEA on the Test Stand.

So today, with a limited crew steps were taken to get us closer to making The Big TMS Move next week.  This is how the storyline went today:

Decoupling the Table/Telescope From the Upper Intermediate Mass Assy (Corey, Justin)

With Justin at the controls of the Genie, and myself snaked into a position under the TMS, we took the load of the Table/Telescope off the Upper Mass, by lifting it with the Genie.  The wire clamps were then removed from the Table (decoupling these systems).  Some of the (8) bolts of these clamps were not easy to unscrew.  The first pair were the toughest.  Thoughts of galled bolts went through my cautious head, but we eventually got the first pair out (maybe that clamp slipped a bit when the assy was suspended and wedged the screws a little).  Either way, the other (6) bolts came out fine.  We then removed the Telescope, installed  the Tooling Feet on the Telescope and laid the whole assembly on the low Optics Table. 

Oh, it should be noted that we also decoupled the Vertical Safety Wire clamp from the Telescope; strung cables up higher and out of the way of the bottom of the Upper Mass, and removed the TMS Cables from the Table.

This all took roughly 2hrs.

Initial Round of TMS Cleaning

Jodi set me up with tools for cleaning:  pre-soaked Alpha wipes, & vacuum.  (we had de-ionizing gun, but I didn't get to that today)

With the Table/Telescope Assy removed, the first thing I inspected/cleaned was the bottom of the Upper Mass--this is because it won't be accessible when the Upper Mass is removed and on the "Transportation Cube".  We don't want to clean the whole thing while it's clamped to the Bosch Frame because we don't want to have to deal with shedding from loosening the dog clamps next week. 

We'll want to remove the Safety Support Beams next week--firstly because some errant screws were installed on this assembly, and secondly because it would be nice to put the lid on the SUS Transportation Cube when we move this guy---it'll keep the Upper Mass sealed & clean. 

I then moved to the Table/Telescope and cleaned them.  This was tough cuz I had to be careful not to bump any optic alignment and I also didn't want to contact any optic glass surfaces.  In other words, I basically focused on vacuuming the metal flat surfaces which were accessible.  I first cleaned the Table in sections.  I did this keeping all the optics covered with huge Alpha wipe blankets as much as possible as I went.  When I was done with the Table, I moved to the Telescope below.  Not much to do here.  I did notice particulates on the mirrors.  I removed some by carefully placing vacuum nozzle tip close to mirror surface.  We'll want to use the de-ionizing gun on these guys later.

Overall, just this cleaning took 3hrs.  And this couldn't really have been done in parallel (unless we had another vacuum).  And we still have cleaning to do (i.e. blowing off optics with deionizing gun).

TMS Protective Cover Installed

I assume this is to prevent bumping optics on the Table?  Either way, all optics were covered with Alpha Wipes.  Then I installed this Protective Cover on top of the Table.  Would be nice to have a Tyvec cover for this guy when it is moved.  A BSC Door is too small.  So maybe a HAM door or BSC Dome Flat?

On Monday's/Next Week's Menu

• I have the alignment template and we can install this on the ISI (this is a trivial/quick task).
• Find the 5-axis table and Transportation cube for the Upper Mass, and then move the Upper Mass from the TMS Lab to the ISI (but also remember to clean the upper part of it at some point).
• Move the Table/Telescope & attach to the Upper Mass on the Test Stand (this requires moving the whole thing inside a cleanroom (!) from the TMS Lab to the Test Stand. 
• Fun, fun, fun.

I left the HEPI ISI controlled for performance measuurements over the weekend.

For future reference, open light values have been taken for ITMX currently at the test stand (QUADTST on medm)

M0F1 22745      1.319 -11372
M0F2 25209      1.190 -12604
M0F3 25497      1.177 -12748
M0LF 25276      1.187 -12638
M0RT 24820      1.209 -12410
M0SD 23964      1.252 -11982
R0F1 25057      1.197 -12529
R0F2 30488      0.984 -15244
R0F3 29015      1.034 -14507
R0LF 29178      1.028 -14589
R0RT 27580      1.088 -13790
R0SD 27366      1.096 -13683

The position of V4 held for a couple hours so I deemed the use of the Springs as explained below ok.  Also, no one in SEI land objected to this.  I then got the V3 Actuator attached.  This did go much smoother than V4.  So two down six to go.

Today we finished disassembly of the work platform @ end y and transported to hi bay and after wipedown, transported into LVEA. Took measuremeants to verify placement of work platform and clean room. Will begin assembly Monday.
Tyler completed the modifications of the baffles for Thomas V and got them off to C&B.
Rick S and myself went to E Y to verify the breadboard placement on the leaner pier. We clamped the breadboard/jig in place and will possibly weld on Monday.

Sprague came on site near noon to fog the X enclosure.  Pablo worked in the H2 LVEA enclosure through ~2:00 PM.  Corey and Justin worked on transmon at X end.  Cyrus visited the outbuildings during the afternoon for CDS work.

Dust alarms:

** The monitors in the OSB bake lab and vac prep area went off regularly with 0.3um values in the low hundreds
** The beer garden monitor went off several times in the late morning and early afternoon.  Apollo and cleaning personnel were sometimes but not always visible in the vicinity.
** Near 2:00 PM the EY monitor alarmed with counts of ~60,000 (3um) and 9,000 (5um).
** The diode room alarmed three times in the early afternoon in the hundreds (3um).
** Monitor 16 near HAM6 went in and out of white all morning, alarming each time.

This morning I reattached the V4 Actuator for the fourth time biasing the Crossbeam 30mils high.  This time the beam was pulled down 45 mils.  Ah geez... While I have resisted doing this in the past, this time I decided to just pulled the beam back up with the DSCW HEPI Springs.  I do this with trepidation cause I'm not sure how this might affect the other corners.  Still, it may make sense.  The attachment of the Actuator imparts a load and why not have the Springs carry this?  OK more Actuators after the SEI Weekly meeting.

We installed a new Endevco into the PEM rack, which replaced Endevco 2. We redid the cross studies for this new Endevco using an accelerometer installed on a shaker and increasing to just before saturation.

We have also now calibrated all of the accelerometers and microphones. Their new calibrations can now be found on the PEM website.  pem.ligo.org

Emily

Over the last 2 days, Gerardo and I glued the prisms and the bump stop mounts to the CP destined for use in the ITMx QUAD suspension.  We had trouble using the ergo arm because the edge of the First Contact sheet on the AR surface crossed the border of the ergo arm o-ring many times causing it to not seal onto the mass.  Pictures of the prism glue joints attached.  View is from looking inside glass at the 2 line contacts of each prism.

For future reference, open light values of TMSX were taken yesterday, before F2<->F3 and LF<->RT cables were swapped, cf table below. The values read by F2 and F3, LF and RT are consequently inverted. I swapped them for now on the medm.

Meager progress attaching Actuators.  The first attempted V4 pulled the crossbeam down 30+ mils. Tried again with similar results.  Then a bad feeling bolt became a tap-it job followed by the bolt is galling situation.  I did get it free with copious lube and leverage.  Another attempt at attachment yielded same shift independent of fluid flow state.  I'd rather not change the Actuator so I may be in for a custom shield job.

HEPI work at HAM6 (LVEA) – Hugh
ITM work (LVEA) – Travis
Roof work – John 
TMS work at End X - Corey

After some adjustements yesterday, a second set of transfer functions has been running overnight with DTT for TMSX suspension. Swept sine excitation have been used, with 30 points between 0.1Hz and 10Hz.

In the attached document, M1-M1 TMSX TF (in black) is plotted against the model and last TMSY measurements (April 2013, in orange).

Measurements as well as coherence (not plotted here), look better than expected, and show good agreement with the model and tmsy, meaning installation can proceed.

data plots and scripts have been commited to the sus svn as of this entry

Got the final SE corner(3) L4-C leveled this morning. Attached is a plot of spectra with five before and three after leveling.  H1 & H2 show a poor (low) response at lower frequencies before leveling.  H4 has good response before and after and H3 has not been leveled for either trace in this plot.  I did check the sprectrum fter leveling and H3 still looked fine.  I does beg the question if it is possible to level an L4-C out of goodness...  Photo sequence attached shows accessing the L4-C mounting screws (after removing the two Actuator adapters), the shims under one corner of the L4-C Mount inside the Crossbeam Foot and before and after levels.  I know I know, it sure doesn't look like it is level.  But, we have no mechanism to roll the mount to center the bubble, and; leveling the L4-C along its long axis is what matters.  The second ring of the level is about 3mrad.  The L4-Cs that were performing poorly, H1 & H2 did require more shimming than the other two corners.  Not a factor or two but larger then 50%.  The effective shimming in the worse case was 18 mrad were as in the least case it was 11 mrad.  Shims are used on just one of the two lower legs of the three point mount, the other leg is not accessible.  So the shim effect is half the shim thickness.  Shims used here were from .086 to 0.134".

Filberto, Aaron, Sheila

We looked into what was going on with the picomotors this afternoon.  Fil power cycled the Corner 2 beckhoff chassis, after which one of the controllers started communicating with the beckhoff again.  

We also had some mix ups.  The pull list has two picomotor controllers listed as going to port 3 on corner 2, controllers 6+7, and I had done the medm screens as through controller 5 goes to port 3.  I added 2 columns to the picomotor list on the wiki, the cable numbers for each controller and the port that the pull list says it should use. I also found that I had mislabeled some of the individual motors in the PLC, I fixed this now.  

Controller 5 should be PICO_B, we will need to fix this in the electronics overview screens as well.  

[Patrick, Peter, Christina]

We realigned the DBB very carefully and verified the optimization of the high power laser with the DBB. (scans will be put in later)

We switched the PSL to (real) full power mode (full power towards the PMC) and turned the half wave plate behind the PMC to send all the light towards the power meter. We think it is best to perform the missing measurements in this known configuration in which the L1 laser was also measured. 

We increased the diode currents (from 2A to 2.18A) of the NPRO to get it back to the nominal output power to 1.8W of the NPRO. Before that the NPRO output power was 1.6W. 

The digital temperature control loop was oscillating due to a too high loop gain. After the gain was reduced, that's working again. 

The output power of the laser is now: 188W

The ISS and FSS are running but were not optimized so far. 

It was determined late yesterday that while it appeared that everything was functioning on h0velx, in fact the control of the solenoid that allow LN2 into CP2 was not actually functional even though the readback on the MEDM implied that it was.  I spent most of today tracking down where the problem lies.  Recall that we had to replace the 2210 card that was originally installed due to a fail light that would not clear on reboot.  We verified that there was a lack of 24V signal at the solenoid first.  I then traced the cabling through the VE rack and was able to determine the 24V supply was present at the input of the FLKM for the 2210 card, but not present on the output regardless of the software setting on the crate.  Further verified that the operation of the relay can be heard on the 2210 card as the software switch is toggled.  Then tried swapping out the relay on the card to rule it out as defective with the same results.  Swapped the card entirely with the remaining spare, also with the same results.  It seems highly unlikely that the same relay on two boards is bad, even after swapping with another (assuming I chose the correct socket/relay).  At this point I suspect a cable issue between the 2210 card and the FLKM terminal block, but have been unable to find a replacement cable ready made on site.  To get the system working, I have bypassed the 2210 card, and wired the 24V supply through to the watchdog card, which then supplies the solenoid.

Original signal path:

24V Supply -> 2210 Relay Control Board -> VME Bus Watchdog Board -> XV150 (CP2 LN2 Fill Solenoid)

As wired now:

24V Supply -> VME Bus Watchdog Board -> XV150 (CP2 LN2 Fill Solenoid)

The VME Watchdog board will (presubably) close the control valve if it VME crate locks up/reboots, providing some of the same level of control as before.  However:

The MEDM software fill valve request control WILL NOT FUNCTION IN THIS STATE.  The readback (HVE-LX:CP2_XV150INT) will change if the switch is toggled, but it is no longer physically wired this way and the state of the MEDM has no bearing on the actual state of the valve.  TO DISABLE THE VALVE: you must pull the appropriate fuse block in the VE LX rack that feeds the field cable marked 'XV150'.

Cyrus has determined that the 24VDC originating in the LX VE rack and which energizes (enables) the instrument air to CP2's LLCV doesn't make it to the field wiring terminal strip in the rack -> As an interim measure, he "hot wired" 24VDC to the terminal strip.  As such, the PID output controlling CP2's liquid level is now effective -> He will consult with Richard as to replacement parts availability -> While in this "hot wired" state, the PID output to the LLCV will be "live" following reboot/restore scenarios and won't require manual enabling via MEDM screen (this can result on overfills)