During the quiet lunch hour Mark ran 3 of the 6 DOF TFs on the ITMy main chain.  The TFs indicated the ITMy looked healthy with resonance peaks in appropriate places.  At 4pm, Vincent reported that he could not run ISI measurements because he ITMy watchdog was tripped.  A quick investigation by Mark, Vicent, Hugh and I on DV indicates that indeed the ITMy seems rung up in Transverse (a motion only driven by the single side BOSEM).  As well, while we can enable the damping loops and watchdaogs such that signals wiggle out the far right of the ITMy MEDM, we aren't convinced damping is actually happening on the ITMy as seen by BOSEM channels on DV, and a quick noisy TF of longitudinal motion.  No mechanical work was undertaken on the ITMy today.  Possible culprits:

SEI work up top in the morning and afternoon could have jarred the ITMy into an EQ stop - will check in the morning, but doubtful as the BOSEM (sensors) postions look unchanged from the morning.

IOP work to remove BS which was hindering measurements, including frontend and model reboots/restarts to everything related to the IOP - Maybe we need a fresh reboot/restart? Will press on with troubleshooting tomorrow.

WP#3582: The h1susb123 IOP model (h1iopsusb123) was modified to disconnect the Beam Splitter Suspension from the trip circuit. Now only ITMY can trigger the DACKILL on this front end. 

BS tripping the DACKILL was severely disrupting the ITMY commissioning, it was accidentally left in my model when I first built it last week, sorry.

While working on floating BSC1, I noticed that the St1V1 actuator looked misaligned. I used some shims to measure, and while the gaps between the magnets on each side of the coil were different (.130 on one side, .060 on the other, the spec is .090 +/- .015), the parallelism wasn't too bad. The alignment of the actuators is checked out as part of the early testing, so the misalignment was likely not due to improper assembly. It's possible this actuator was whacked at some point, but it seems improbable that would result in a purely horizontal move (the coil is only supported at one end and would probably rotate instead of translate, and not be parallel anymore). I checked all the other actuators on St1 and St2, and they all pass, so I'm kind of at a loss. Pictures forthcoming.

Forgot to add: the alignment of this actuator has been fixed.

Large swings in CP8 control following yesterdays changes -> Looks like I had mistakenly restored 0.10 as the PID integral parameter last night instead of the nominal 0.01 -> re-entered 0.01 this morning

The AC units and HEPAs in the laser room have been turned off, and the make up air reduced to 25% to maintain an overpressure in that room. The anteroom HEPAs were turned to Standby, which is 55%, also done to maintain an overpressure. The lights in both rooms have been turned off, but the monitors and computers are left on, since I couldn't get those from outside. I'll set the fans back to their original values at the end of the day and post the results. This is to see how the temperature of the room stabilizes in "science mode" conditions.

Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot from approximately 6 PM Nov. 27 to 6 PM Nov. 28. Also attached are plots of the modes to show when they were running/acquiring data.

As found clearance between stop screw and stroke-factor lever was about the thickness of a sheet of paper, i.e. not in contact for 0% open PID output -> Confirmed that needle closed for 0% open PID output after change -> effect of adjustment on stroke (range) ignored for now

Jim, Mitchell, Greg & Hugh

Yesterday we got the L4-Cs changed out and got started on re-balancing Stage2.  Today we completed that and finished balancing Stage1 followed by setting the CPS gaps and finally checking and connecting all the sensors.  Still have several things to do including cable dress up and likely a few more items.

Chamber work continued at HAM1 for the Mode Cleaner & work continued at the BSC Test Stand as well. 

LVEA transitioned to Laser Hazard at 9:30am (and remains that way).

WIth IO still working out some yaw issues before I am needed for another round of pitch adjustment, I was free to resume work on the BS suspension on the BSC 2 cartridge.  After refreshing my memory via Hugh, I locked down the ISI.  The first round of lockers (Stage 2 lockers??) worked flawlessly.  However, moving to the second round, I was only able to get 2 of the 3 lockers fully engaged.  I wasn't using isopropanol as is standard practice within SEI, but determined by nudging the ISI that is was locked sufficiently to allow me to do what I had intended.  I began work on the BS by removing the ECD magnet block and replacing them with the dummy Al blocks.  This required reweighting the top mass as these block were also a COM correction in addition to eliminating magnets.  I reweighed and redistributed the masses to the nominal (symmetrical) arrangement.  I then resuspended the chain and confirmed that the new arrangement produced a favorable alignment of the chain i.e. no gross pitch.  Next up: replace the BOSEMs that I removed to facilitate ECD block replacement, and finish cabling for the first round of re-testing.  Cartridge status:  ISI is locked, SUS is hanging.

Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot from approximately 6 PM Nov. 26 to 6 PM Nov. 27. Also attached are plots of the modes to show when they were running/acquiring data.

There were no recorded local status alarms for the dust monitor at location 2 at end Y for this period.

- Chris, Giacomo, Cheryl, Kiwamu (yesterday)

We aligned the mode cleaner and have it flashing.

We had to rotate MC1 and MC3 in YAW, to get them within range of their sliders.  Tomorrow we fine tune the alignment with sliders and then offload the sliders by pushing the cages and adjusting the pitch.  We'll need some help from SUS to adjust the pitch.

After correcting the BSC-ISI master model, I have installed filters (FF01) for the feedforward control from the HEPI (L4Cs read by the fourth ADC of the ISI model) to stage 1 of the ISI.

For the measurements and the filter design, no symmetrization filters were used on the HEPI L4C. Feedforward was implemented in the X, Y and Z directions. Coherence from HEPI to ISI is really low in the rotation DOFs.
In attachment, non calibrated amplitude spectra of the T240s (stage 1) and the GS13s (stage 2) are shown in two different configurations:
- RED: ISI Damped on both stages
- BLUE: ISI Damped on both stages and stage 0-1 actuators also fed by HEPI L4Cs - No Isolation on stage 2

Isolation is pretty good on both stages (with only stage 1 controlled).

h1seib6 froze up, most probably due to the "DAQ Reload" button press. Unfortunately I forgot about the Dolphin network and restarted h1seib6 models which crashed out h1susb6 and h1pemey. I restarted those, and put the warning label over the power button on the Dolphin'ed front ends. We seem to be seeing the safe.snap not being restored bug again, I had to manually restore the IOP and SUS TMSY.

(Doug, Jason, Travis)
BS position with dummy mass installed in "bang" on. The glass mass will shorten the distance by 1.46mm due to thickness difference, but is still within the 1.46mm +/-3.0mm tolerance.
Prior error due to a Teflon transport stop being in place during the previous measurements.

At the request of Dave and Besty, I've used Joe and Adam's Instructions to building SUS infrastructure from scratch (supplemented by more stuff by me) to fill in everything* needed for H1 SUS ITMY, including all filters and EPICs values, using H1 SUS ETMY as my starter QUAD. Note that I've changed EPICs values that are not common to each QUAD, namely:
- Zeroed out alignment offsets
- Installed correct ISI<->SUS projection matrices for H1 SUS ITMY
- Zeroed out non-diagonal DRIVEALIGN matrix elements.
After which I've saved a safe.snap, which lives here:
/opt/rtcds/userapps/release/sus/h1/burtfiles/itmy/h1susitmy_safe.snap

Attached is a detailed log of my actions, such that they might be turned into a script one day, if not at least used to fill out the wiki instructions...

* "Everything" excludes correct optical lever calibration gains, and OSEMINF open light offsets and gains, which need to be measured and installed when possible.

I plugged in all 6 ITMy 25-pin connectors to the F3 feedthru flange on the BSC1 chamber.  Richard has been checking out the in-air connections/electronics.  Currently the PUM stage signals do not look healthy - he is chasing.  As well, Dave is making a burt restore file for this guy since he was blank - a copy/paste from the ETM.  Kissel is going to check it/tweek it later.

I've released the suspension so the speed dials should show normal swing and we can attempt damping as soon as everyone else is finished.  That said, SEI is heading back out to do trim masses upstairs this afternoon.