Checking to see if anyone had centered the optical levers in hopes to grab a spectra of the Commissioning Team's awesome new spectra, I found that 
- ETMY was still not centered, but with the corrected calibration
- ITMY was centered, but had the old calibration
(queue sad trombone).

I've restored the ITMY calibration that I installed yesterday morning.

I see that H2SUSITMY and H2SUSETMY were rebooted some time later in the day yesterday, according to the ops log, but I don't see any further details/aLOGs as to why...
My guess is that safe.snap had not been updated since those calibrations were installed (though the right calibration stuck for ETMY...). 

I haven't gathered a new safe.snap myself, I'll will wait for local staff, as I'm not sure about the state of the cavity. But, when you do, remember there's a nifty script here:
${userapps}/release/cds/common/scripts/makeSafeBackup
which can use to make a new safe.snap in the appropriate reboot location, and it also makes a copy in the appropriate userapps directory (with the model name appended), e.g. 

0$ cd /opt/rtcds/userapps/release/cds/common/scripts/
0$ ./makeSafeBackup sus h2susitmy
0$ 

which puts files in
/opt/rtcds/lho/h2/target/h2susitmy/h2susitmyepics/burt/safe.snap
and
/opt/rtcds/userapps/release/sus/h2/burtfiles/h2susitmy_safe.snap

Today, we finally stuffed the optic in the PR2 suspension and started correcting it's roll.  We will finish suspending it tomorrow.  As well, Filiberto and Travis sorted out a cable issue on the PR2 chamberside testing setup.  Since, for the moment, we cannot test both MC2 and PR2 simulatenously, and PR2 is our higher priority, we have "given" the shared cable between them to PR2 in hopes of getting it's full data set run over the next 4 business days.  Seek Filiberto if for some reason you need it moved back to MC2 (possibly to facilitate it's testing later next week).

The Arm is locked, as off 03:24:00 UTC (20:24h local time).

The various controls are in the state listed below.

Channel of interest is 'H2:ALS-Y_ARM_LONG_IN1_DQ' and has units of nm (and is sampled at 16k).

HPI State:

All running fine. The cavity feedback (off load) at low frequencies to HPI ETMY, with a UGF of ~1 mHz. ETMY_ISCINF_LONG has a a 250k nm limit on the output (I got an effective limit of 200k nm on the output of the signal ISC sends into the RFM).

ISI State:

Stage 1, (ITM/ETM) X/Y 250mHz blend other at 750mHz blend

Stage 2: (ITM/ETM) XY 100mHz other 750mHz blend.

Quad Sate:

ETM: M0 damping on, L1 L/P damping only, L2 no damping (watch dog off), L3 no damping

ITM: M0 damping on, L1 L/P damping only, L2 no damping (watch dog off), L3 no damping (watch dog off)

Attached is an initial spectrum .... the frequency noise has dropped nicely! (due to 3791)

I was not able to close the PZT servo loop which keep the beams nice and tight lock to the TMS. It turned out that the filter switches of thewhitening board 'were enganged' but not ON. I toggled all the buttons on the medm screens which seemed to fix the problem.

The beam is nicely locked to the TMS ...

Elli, Robert, Bram

We had another look into the RefCav. I think we found the culprit ... the free-space to fiber coupler behind the RefCav is retro reflecting back to the cavity. We use an angle-cleaved fiber cut to remidy this, but not enough. When we block the beam to the fiber coupler, intensity flickering on the CCD is gone. You can still see he peaks on the transmitted diode, but they are most likely intensity fluctuations (which is we 'immune' to).

By the lack of finding any quarter waveplates, we placed a half waveplate, a PBS and a faraday rotator after the first steering mirror behind the cavity to capture any back reflections (from the fiber coupler, photodiode and CCD).

Now we will need to relock the arm cavity to see if it made any improvements ..

I turned off the ETM ring heater at 1:37:50 UTC.

DaveB, JimB, HugoP

Models were recently updated at LLO so they can use Dolphin. Updates were transfered over to LHO. HAM3-ISI model was re-installed.

We also seized the opportunity to install HAM2-ISI model which is now running.

MEDM screens for HAM2-ISI were added to the VIDEO6 display of the control room, next to the ones of HAM3-ISI.

The arborescence, and the unit-specific testing-programs for HAM2 were created.

Coordinate transform matcices were filled for both ISIs.

CoreyG ,HugoP

Transfer functions ran overnight yesterday. Unwanted resonances are present in the vicinity of 130Hz, on all DOF. The usual suspect is then the 600lbs payload mass set on top of the ISI. One can hear it resonating when being hit. The washers it was sat on were too close from each other. Corey and I lifted this top mass with a fork lift and reset the washers. The mass would vibrate way less when being hit afterwards.

Transfer functions are running overnight.

video3, which displays the psl enclosure cameras in the control room, died spontaneously with a message in several languages stating it needed to be powered off.  So it was powered off and turned back on.  Someone who knows the passwords to the cameras will need to enter them to get the video to display again.

I'm concerned that trying to solve for higher order optical aberrations coupled with motion of the HWS beam is causing problems in the parameterization of the HWS data. I ammended the HWS code to limit the parameterization of the wavefront gradient measurement to only pitch/yaw, spherical and cylindrical power. Additionally, I lowered the threshold on the intensity of acceptable spots to centroid on the HWS, increasing the number from 24 to 45. The noise in the measured spherical power was significantly reduced as a result (mostly from the simplification of the parameterization).

A plot of the measured spherical power noise floor referenced to the ETM is attached. The scale may be off in absolute magnitude by up to 20% due to the lack of a measurement of the magnification of the optical system as installed; the plot assumes the nominal 20x magnification.

The HAM5 and HAM6 annulus ion pumps demonstrated their ability to maintain the annulus pressure (unassisted by aux. carts) for greater than 2 days with ion current values of 5 LEDs and 6 LEDs respectively.  This was done while the Vertex was under vacuum.  Additionally, no pressure communication was observed on the Vertex MTP CC gauge (@ 3 x 10-7 torr) when the HAM5-HAM6 annulus volume was vented.  

craning in LVEA in the morning
SEI crew near HAM3 for cabling and such
reboots of Simulink user models for FMY, ITMY, & ETMY
SURFs to the Mid-Y and End-Y stations
dome and door install on BSC9

A final tally of 7 ea. total conflat joints could not be made leak-tight in-situ and will need to be reflanged/repaired at some point following the vent.  A quick testing of the welds on the MC output spools will be done just prior to tomorrow's vent.

The dome and two doors were returned to BSC9 this afternoon in preparation for the flooring install that is due to start next Wednesday.

Updates were made to the FMY Simulink user model "h2susfmy" in incorporate the ISI to SUS transformation inputs to the BSFM_MASTER model. There were also three ISC control outputs to BSFM_MASTER that were removed.  The FMY model has been compiled, installed, and begun on 'h2susb78'.

The top level custom model is committed to the CDS SVN locally in:
'/opt/rtcds/lho/h2/userapps/release/sus/h2/models/'

The common library part "BSFM_MASTER" is saved locally in:
'/opt/rtcds/lho/h2/userapps/release/sus/common/models/'

MC2 went into HAM3 on 8/6/12.  View the photo collection in ResourceSpace.

Today, Filiberto re-routed the external MC2 (and the 1 shared PR2 cable) from the chamberside test area to the chamber feed thru.  From there we spent a little time finding a cable swap and remedying.  ( I *think* the switch is related to the callout of "flooring" positions of the cabble connectors in the cable table brackets.)  We then set the 6 TOP BOSEMs to 50% OLV.  We can now run TFs to kick off SUS Phase 3a testing here.  Not entirely sure who will do this - possibly me when I get in midday.

PR2 glass install chamberside was stalled another day as we discovered contamination on the AR surface in many places (smudges as well as FirstContact overspray?).  We will need to spend some time drag wiping this tomorrow and and then re-attemp the install.

UFl and SEI should feel free to spend some morning time working on table payload if they want/need.  Any MC2 TFs in-progress will be posted or announced.

Attached is a spectrum from last night (7 August 2012), starting a ~23:30h.

There seems to be a narrow spike at 700mHz, while the 2.74 Hz peaks are still there. I guess we nudging downwards ...