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)

Today I bagged GV6's gate annulus joint whose leak had been improved with the application of VacSeal around the flange seam a few weeks ago.  I partially evacuated the bagged joint using an aux. pump cart and observed a pressure response in PT124B, i.e. there is still a leak -> I removed the bag and applied VacSeal around the flange bolts as the thru holes that they route through provide a leak path -> We have not, as yet, applied VacSeal on the welded butt-joint which is in close proximity

After wiring up the HEPI L4-Cs to confirm they were good, I saw that two were not like the other two.  So I though they were bad and did some wiring swaps to troubleshoot the problem.  This told me it was indeed the L4-C or its local wiring.  Then I leveled them and they look fine now.  Did not realize it would be so obvious.  3 of 4 corners now level with the SE corner 3 still to do.  More visuals on the morrow.

Prep for move:
- last nights TFs corrupted by "reversed"  magnets 
- cable swap fixed the situation  (LF/RT and F2/F3)
- bosch frame wrapped in foil to calm the air current effect on TMS
- genie left out to get the best isolation for TMSX TFs

Other:
- picture of one 2" optic on TMS ISC table shows some particulate
- particulate seen on all 2" optics
- level of particulate is low enough that blowing off the surface is sufficient

In preparation for helping Cheryl clean the TMS assembly prior to its move out of the lab, I hauled a Tiger Vac and accoutrements down to the End Station. I wiped down various parts, assembled the vacuum,and applied a C-3 hose cover. The vacuum, a custom Class B attachment, and other items were placed in the lab, ready for use.

Activities from today:

H1 PSL Shutter closed (Mike/Justin)

LLO Xarm Pcal Periscope craned/crated today (Rick, Pablo, Colin)

HAM6 HEPI work:  Elec check, L4C adjustment, Actuator work. (HUGH)

Tour around 1115-noon

Starting PSL Models

SUS reboot to reproduce matrix problem (Dave)

GV6 work with aux.pump cart noise this afternoon (Kyle)

TMS crew (Jeff, Andres, Cheryl) working at EX.  The Bosch Stand is now wrapped in foil (to limit winds).

Chris Soike and I spent the afternoon de-suspending the last three iLIGO large optics (2@MMT and 1@RM) from suspensions. The optics were placed in cake tins and verified ready for shipment to CIT for storage. 

HEPI:
I checked out the HEPI system. It looks good however the horizontal actuator in corner 3 seems to be a little bit weaker (15%) than the other horizontal actuators. It's not an issue since it will be corrected with the actuator symmetrization filters.

ISI:
Due to the HEPI rewiring, I recomputed the feedforward filters from the HEPI to the ISI.

To investigate the matrix settings problem I restarted all the models on h1sush56 (including the IOP) many times. I was not able to reproduce the problem. These models are now running and burt restored to their safe.snap.

WP4093 Christina, Patrick and Dave.

We restarted the H1 PSL models h1psliss and h1pslpmc with new code Christina installed yesterday.

[Patrick, Christina]

We did a level 3 maintainance of the high power oscillator, this includes an optimization of the pump diode currents as well as the temperature of each diode. Afterwards we set the the diode currents to 100% again. This increased the output power by about 15% inside the oscillator box. 

Next step is to check the calibration of the photo diode signals.