Two-fer tonight

ITMx Alignment

• Pitch: -1046 µrad (down)
  • Target: -971 µrad (down) -- (619 µrad optic pitch + 352 µrad FC correction)
  • Error: -75 µrad (down)
  • Tolerance: ±50 µrad
• Yaw: +32 µrad (CCW)
  • Target: 0 µrad
  • Error: +32 µrad (CCW)
  • Tolerance: ±50 µrad

IAS is now on hold until the HEPI actuators are attached; we will then take another look.  At some point after that we will have to do a small pitch correction.

ITMx ACB Alignment

• Lateral Error: -0.5 mm (East)
  • Tolerance: ±2.0 mm
• Vertical Error: +1.7 mm (high)
  • Tolerance: ±2.0 mm

All is within spec and good to go.

Something was wrong with communication between the cornner beckhoff plc2 and epics.  When I tried to change something in an medm screen, it would not change,  When I stoped PLC2, it would change the value on the medm screen.  Also, on the LSC refl common mode board medm screen, things were just continuously flipping, altough on the twincat side nothing seemed to be changing.  I tried commenting out all the changes I had made to the PLC, which didn't change the situation, tried rebuild all, clean all.  I tried shutting everything on the etchercat machine down and running the installation scripts again,  the epics did not come back.  Dave restarted the epics gateway, and things seemed to come back (at least from the other PLCs).  I was able to change values on medm screens, but the change didn't make it to the twincat side.  Then patrick suggested rebooting h1ecatc1, so I did and that seems to have fixed the problem. Adding back in my changes one at a time did not reproduce the problem. 

ALso, the timing system erros are back, Xend, Y end and Corner.  I'm not sure why.

Day's Activities:

Hugh/Greg working on HEPI for ITMx this morning

SUS restart required for MC mirrors (for Cheryl work later).

Stefan/Sheila investiagting PSL issues

Justin prepping South Bay for Laser Hazard transition

Jim balancing BSC3

Thomas getting ready for ACB alignment (with Doug/Jason?)

Alexa transitioned Squeezer Bay Area to Laser SAFE

Kyle swapping states of GV5 & 6 over night (GV6 may cam shut, causing a BIG BANG, so just be mindful of this expected occurrence)

Lots of moving around infrastructure at EX

LN2 at MX CP5

Roofers at Y1

Hopefully GV6 will cam closed at some point tonight -> will increase pressure to 75 psi tomorrow otherwise

As Jason logged yesterday, the ITMx was good except for the Yaw.  SEI turned the HEPI DSCW Springs to correct the Yaw error; we brough it from 1.6mrad to 35urads.  We then checked and leveled the Optical Table.  It was only barely out of spec with 0.3mm over the table; we got it to <0.2mm just hitting our 100urad goal.  With the Optical Level using TGT402 for reference, the OT is 0.6mm high.  I locked the HEPI after final DI readings for ACB work.

With these Yaw and Level adjustments, some unintended motion occur but they are small.  Based on the Dial Indicators, the platform moved 0.1mm South, 0.2mm East, & 20urads CW since the observations IAS took. We should be in OK shape.

Attached find my log book pages for this saga.  Thanks, to GregG & MitchellR

The crew (Mark L., Randy, Eddy and Tyler) finished dismantling the Test Stand cleanroom and transported it to Y End. They moved the chamber cleanroom off of BSC9 (to BSC5) so that the Work Platform was accessible. After lunch, they worked on removing the Work Platform Stabilizers and dismantling the Work Platform. Before they leave today, they will move the chamber cleanroom back over BSC9 and turn it on so that it is eligible for cleaning tomorrow (likely in the afternoon).

After SUS moved the quad 6mm, and Hugh and IAS put the cartridge in position with HEPI, I went in and rebalance BSC3 ISI. Very minimal changes were required and the ISI is now locked again while TVo, et al. go in and align the ACB.

(Alexa, Daniel)

We have installed and cabled the ASC WFS VAC patch panels on ISC R2 (ASC REFL A, B) and R3 (ASC AS A,B).

Kyle, Gerardo 

The following pressures were recorded after opening the gauge isolation valve and waiting for the pressure reading to stabilize (~5 minutes after opening the isolation valve):  

11/7/2013                               8/20/2003  
Dewar                            
8514371 = 61 microns,           27 microns, 
8514372 = 28 microns,           13 microns, 
8514374 = 730 microns,          60 microns, 
8514375 = 45 microns,           25 microns, 
8514376 = 49 microns,           30 microns, 
8514377 = 42 microns,           10 microns, 
8514379 = 81 microns            26 microns, 
8514380 = 58 microns            24 microns  

The dewar vacuum jackets had been pumped (using a 250L/s turbo pump cart) ~8 months prior to the 8/20/2003 measurements.  

Note that current LN2 consumption for 8514374 is higher than expected and is likely the result of excessive heat load due to its excessive pressure.  Also, this dewar had additional vermiculite? perlite? added to its vacuum jacket since the 8/20/2003 readings.

Sheila, Stefan

The PMC servo has been oscillating for about 2 weeks. Attached is a plot of
Purple: PMC REFL power
Blue:   PMC REFL PDH error signal
Yellow: Signal at the TEST A monitor point of the PMC locking servo board.

Something is clearly wrong with the card - we suggest using a spare.

After the sus model restarts last night around 21:50 local time, the AI Chassis for h1sush2a and h1sush23 went into a locked state whereby they were not outputting the DAC drives and could not be reset.

We first worked on h1sush2a. We stopped the user models, restarted h1iopsush2a, checked the loopback duotone and saw it was now working. We started the user models and everything was driving correctly so we handed this over to the IMC group.

The we looked around and saw that h1sush34 was also in a bad state. There was less pressure to restore this system so we could do some testing.

First we went into the CER and verified that all 6 AI chassis were disabled by the IOP model.

We stopped all the user models.

First test, start h1iopsush34, reset its DACKILL, start h1sussr2, reset its DACKILL. All looks good, cannot reproduce error.

Second test, start h1iopsush34, DO NIT reset its DACKILL, start h1sussr2, reset its DACKILL, then reset IOP DACKILL. All looks good, cannot reproduce error.

For further information, we started all the models on h1sush34 and all DAC statuses are GREEN. Power down one AI Chassis, DAC0 and DAC1 5th bit went RED, it is a readback of AI status (16 channels per AI, two 18bit DACs per AI).

In Summary, code restarts caused IOP/AI lockout. Restarting IOP models cleared the problem. We cannot reproduce the problem easily. Last night the sus models were restarted at least four times, but only the last restart caused the problem.

HAM2 and HAM3 HEPI are currently locked. IO requested a survey of the shift between the current position of HEPI, and its controlled position during a recent IMC lock: October 5th 2013, 9am to 10am.

We looked at the IPS readouts to track the position of HEPI. The following script was created for calibration and coordinate transform of the signals: /ligo/svncommon/SeiSVN/seismic/HEPI/H1/Common/HEPI_Shift_Cart.m

MitchR, JimW

Per Cheryl and JoeG's request, we went into HAM2 to plug in the 5-way coax cables into the vac-side chamber feedthrus. It took 3 hours for 4 cables, but it's done. For the people planning 3IFO install stuff, this job would be much easier to do before the ISI goes in the chamber. These cables are difficult in the BSC chambers, where access is pretty good. In the HAM chamber, it's almost impossible. The reach is bad, there's no visibility and you can only use one hand. Because these cables are spring loaded, you would really like two hands, one to hold the cable in place Failiing that, a good alternative might have been to pull the feedthrus and install from the outside, but cable trays and piping would have made access on that side pretty awful, too.

The contractor removing insulation from the BT has completed the X arm and is moving his equipment to the Y arm. Photo is X2 module at the end station.

Weather has slowed the roofing work a little but still good progress has been made, Metal trim appears to be complete on the outbuildings and the electricians are restoring the lighning protection.

At the corner the upper decks are completed with membrane, Trim work is in progress and detail work around our staircase is largely done. The OSB membrane is more than 50% done. The projected finish is the 3rd week of November.

PR3 OpLev watchdog Sum Minimum set to 0 from 5000, in order to reset M13 level watchdog - not necessary or IO alignment, but something is preventing me from driving ANY optic on HAM2 - which is a problem.

The h1sush56 computer was restarted at 08:34 after becoming locked up during a user model start yesterday evening.

J. Kissel, D. Barker, J. Batch, A. Pele

Another harrowing day of front-end code changes. 

In summary, I've now completed and committed all the simulink / front-end model, MEDM screen, and macro file modifications for the HLTS, HSTS, and OMCS. This involved several more recompiles, reinstalls, restarts, and restores of all 10 models involved, a couple of more crashes and restarts of the DAQ, and a whole lot of eye-crossing details. The final modification -- to the OMCS front-end code -- has crashed the h1sush56 front end again (as the rest of these installs have, save h1sush2a for some reason), and almost undoubtedly because of the usual mx_stream failure. Thankfully, if did not crash the rest of the DAQ, so data taking should still hold over night.

Though I'm confident every thing I've done is legit, we should give a day to get things back up and running before we officially release everything to LLO. (Though I know they're not interested in more changes until they vent next Wednesday.)

Of note -- It was not until I got to the MC_MASTER parts today, and getting some feedback from ISC folks that I realized -- for calibrated, interferometric control channel purposes (think IMC_X, PRCL, SRCL, MICH, DARM) -- we need to send out the output of each LOCK filter bank (including the top stage) to the top level to be sent over IPC to the OAF / Calibration model. For those SUS that aren't involved in global control, we'll just terminate the unused connections at the *top-level* of each model (currently only h1susmc2 is *actually* using this type of spigot to form IMC_X, the remaining IFO DOFs' control signals are pulled out for calibration in the LSC model). There are a couple of ways to do the calibrated channel thing; I'll bring up with ISC / Systems as to how we want to do it (because it's currently inconsistent across the ISC / IO models). Unfortunately, this means I've gotta go back to the QUADs and BSFM, but I'll wait for the discussion to conclude before I do so.

Next on the chopping block -- tackle the severe upgrades and merging needed on the HAUX / HTTS models. Then that finally, finally, OMG finally, will close out this gosh darn ECR. Then we can do it all over again with the watchdog modifications. #facepalm.

Sheila, Richard, Jim, Patrick, Dave

Commissioning work on the rotation stage controller caused a 24VDC power glitch to the h1psl0 IO Chassis at 10:55 local time today. The FE computer did not crash, it allowed us to log in and verify that no ADC/DAC cards were visible via the One Stop system.

We powered down the FE computer, power cycled the IO Chassis, powered up the FE computer. When the models auto started with their safe.snap epics settings restored the PSL camera images all went blank due to a shutter closure in the Diode Room. We had seen this before and now know the recovery. On the PSL_LASER MEDM screen, the "External Shutter Request" section, the "Flow sensor" must be set to OPEN by pressing the small RESET button immediately below it. Only when all the requests are GREEN can the main RESET button be pressed. At that point a reset button has to be pressed on the Beckhoff controls system. At the moment this requires someone going into the Diode Room and pressing the button on the Beckhoff PC console. We should set up remote desktop to allow this from the control room.

The safe.snap settings do not appear to be correct. Sheila burt restored ISS, FSS and PMC from 23:00 27th Oct and the upper right video image came to life (PMC refl). But the PMC is not currently locking.