The ISI was tripping and I saw it was because the deltas between free position and the targets were too large.  I didn't realize we were restoring all DOFs, I thought we only restored the RZ (Yaw) except for a few other special case locations.  This tripping was happening during the RX & RY target restores and maybe this makes sense.  The payload/balance changed on HAM3 (as on many others) and the balance was done well within spec.  See the first attachment for the CPS Local shifts during my balance on July24. This looks pretty bad even though our spec is +-1600 counts.  This is a 2 day plot though and there may be some detail in the time I actually balanced, like, since the payload changed here so might some distortion on the table and a new CPS zero/lock comes about.  Regardless, it is still within spec even though I feel this could have been balanced better.  See the second plot though for the real problem.  Since the free hanging position moved, of course so did the cartesian position.  Since the current ISI control scheme is restoring the target bias of all DoFs, the controller has a lot further to drive to the target and hence the trip.  Tried several times with Guardian and ISI scripts and same thing.  I reset the Targets to the current free hanging position and all is well. The third plot is the shift in the target position for the record if someone needs to steer back.

WHAM3 is currently under managed Guardian control at ISOLATED.

I slightly modified the previously made LSC ODC block and added it to Kiwamu's latest LSC model. The model compiles, but I am holding off with installing on running. They are not in svn yet because I want to verify the model is running well.

Affected files:

common/models/lsc_asKiwamuLeftIt_20140806.mdl               : What the name sais. My starting point.
common/models/lsc_addingODC_inprogress_20140805.mdl  : my changes
common/models/lsc.mdl                                                           : currently same as common/models/lsc_addingODC_inprogress_20140805.mdl
h1/models/h1lsc_asKiwamuLeftIt_20140806.mdl                    : What the name sais. My starting point.
h1/models/h1lsc_ODCAdded_20140806.mdl                          : my changes
h1/models/h1lsc.mdl                                                                : currently same as h1/models/h1lsc_ODCAdded_20140806.mdl

Unable to run some static tests on this HEPI due to large offset on the IPS.  Tweeked this to ~100.  See the attached: The 7th graph is the local IPS V4 sensor and the zeroing is clear.  The rest of the graphs are the cartesian values.  It makes sense that Z RX & RY are changed during the tweek.  The rest of the CART DoFs are unchanged.  Don't be fooled--the shifts in the other dofs are earlier by a few minutes when the loops were opened.

I will be at LHO next week to conduct measurements relevant to BSC pier amplification. The linked document contains the plans and some questions about what can be done on site.

https://dcc.ligo.org/LIGO-L1400130

Had to power up the ESD HV supplies this morning for testing the charge on the optic.  Once again one of the supplies would not stay on.  As it ran through diagnostics during start up it would trip off.  We replaced this unit.  The next problem was the DAC cable was on the wrong connection on the AI board.  This probably happened during Power board check a few weeks ago.  After this was fixed had to unplug and plug back in DAC cable at ESD to clear error there.  This has been seen in the past and resembles a blown chassis by railing outputs at 430Vdc.  The system was then restarted and appears to be working

model restarts logged for Tue 05/Aug/2014
2014_08_05 10:16 h1hpietmy
2014_08_05 10:16 h1iopseiey
2014_08_05 10:16 h1isietmy
2014_08_05 10:20 h1iopsusey
2014_08_05 10:20 h1susetmy
2014_08_05 10:20 h1sustmsy
2014_08_05 13:02 h1fw1

Unexpected freeze of h1seiey, unexpected dolphin glitch of h1susey during recovery, unexpected h1fw1 restart.

Corner Station:
	Pumping continues throughout the day
HAM6: 
	Table is ready for beam
	Replacing feed through for fast shutter
	Mounting Viewport emulator on north side of chamber
OpLev:
	Alignment on X-Arm and Y-Arm
EE:
	Installing whitening chassis for OpLevs
End-Y:
	Working on charging experiment
End-X: 
	Installation of Tip-Tilt equipment  

Performance is another question but at least it is stable.  No trips of the ISI or HEPI since before 1700pdt yesterday.

(Borja)

I have continued the coil balancing work that Jeff and Arnauld did yesterday (aLog entry 13203). In these measurements I have concentrated on SR2 and redone stage M3 (with an improved balance) and tried to balance stage M2, however in trying to do so I encountered some problem as reported on the notes attached below, it is worth noticing that tunning of the UL coil on stage M2 has no effect at all on the output signals which may indicate that the coil is actually not connected.

Summary of balancing performance:

Summary of the optimum balancing Gains:

Apollo installing viewport gatevalves on H1 BSC chambers in LVEA for ionizer equipment

09:03 Nathan starting unattended laser work in the optics lab
09:12 Hugh to HAM4 to remove ameristat and unlock HEPI
09:18 end Y transitioned to laser safe
09:32 Jeff B. and Andres to HAM6, contamination control check
09:41 Travis checking on mobility experiment on west door of HAM3
09:46 Jim B. to check on SEI IOP (unexpected shutdown at 8:41)
09:47 Betsy picking up equipment in LVEA
10:13 Dave and Jim B. restarting end Y SEI, will take down end Y ISC and SUS (on same Dolphin network)
10:16 Hugh done unlocking HEPI
10:39 Dave and Jim B. restarted the mid X weather station
10:56 Sheila to IOT2L, if it has been moved into place will install light pipes
11:00 Bubba to end X to retrieve part for door removal
11:00 Jordan, Paul and Sudarsham to Y1 beam tube enclosure, accelerometer measurements
11:08 Jason and Doug to begin alignment of ITMX optical lever, Arnaud to put ITMX mirror into nominal position
11:18 SnoValley to see John W.
11:34 Paradise water delivery
11:34 starting HAM6 door removal
11:43 Peter K. to end Y to take pictures through viewport
12:03 Krishna, Eric and Jeff K. to end X to work on BRS
13:08 Christina to end X and end Y to install magnetometers
13:12 Aaron to start drilling in the old H1 PSL chiller room (WP 4777)
13:39 Paul and Jordan to end X for PEM measurements
13:57 Dan and Koji to HAM6 to install fast shutter
14:17 Gerardo, Rai and Kyle working on ionizer experiment at end Y
15:43 Fire department investigating trouble panel alarm at mid Y
16:45 Nathan supervised by Dick G. in optics lab

Maintenance tasks:
PSL chiller filled yesterday, left alone
reset HEPI overflow counters for HAM3, BS.
John W. confirmed work was done regarding this alog. I set HVE-MY:Y5_246BTORR.HIHI back to 5e-08.

WP 4776

I stopped conlog 1.3 on h1conlog at 17:26 PDT. I ran the script to create a new channel list and started conlog 2.0 on h1conlog2 with it. The database is being replicated to a read only copy on h1conlog3.

The web search interface can currently be accessed from an internal CDS machine at http://h1conlog3.

I am in the process of creating a backup of the 1.3 database.

Jeff K., Krishna V., Erik S.

Today we started with the assembly of the left arm of the vacuum can. The older flexures on the balance were damaged during transport so we replaced them with another pair Krishna had brought. We then inserted the balance into the 6-way cross and suspended it successfully. We were then adjusting masses on the balance to lower the resonance frequency close to 10 mHz. By the end of the day we got the frequency close to 20 mHz. 

Pictures of the assembly process attached in assembly order!

Will resume attended rough pumping of Vertex, XBM and YBM combined volumes tomorrow 

Alexa, Sheila

We saw that there was no signal on the PSL periscope PD, so we entered the PSL to investigate.  There is currently 170mW of light entering the periscope, and 0.7uW incident on the PD.  We measured the voltage from the PD using an osciliscope, it has a 13 mV offset and 4 mV of signal.  (both negative) This gives 0.38A/W, (we did not change the gain switch, so the gain setting should still be 15kOhms), and the pick off ratio (power on PD/power into HAM1) is 0.004.  These are not so different from the measurement Paul reported in alog 9865  We will stick with the old calibration which was made with more light on the diode.

We did not finish checking the calibration of this PD because there is also a problem with beckhoff.  Everything on corner chassis 3, 4, 5, and 6 is NO_COMM.  The problem with beckhoff was fixed by unplugging and reconnecting the cable between Corner Chassis 2+3, which could be a bad cable that needs to be replaced.

[Dan Koji]

A first fast shutter was placed at the approximate location on the HAM6 table. The cable has been connected to the shutter.
The feedthru end of the cable is waiting for replacement of a 2.75" feedthru flange. This flange is D3-3 according to D1002877.

The table space is really tight. The space for the shutter was just barely OK to place it behind OM3. It yet needs precise aligment.
The path for the (expected) reflected beam from the shutter was cleared by moving the beam dump for ASAIR beam diverter

The golden beam dump was installed at the edge of the table. This was realized by moving the cable post for the beam diverter.

While doing cabling for HAM6 in the CER, noticed that the following cables for ISCT1 in ISC-C2 were plugged in backwards. Swapped the following at the EtherCAT Corner 5 Chassis. Cables are connected as listed below and match the pull list E12000408.

Cable_ISC_328 connected to Port 9 (DC PD's ISCT1)
Cable_ISC_326 connected to Port 10 (Auxiliary ISCT1)

Filiberto Clara

[Jeff Arnaud]

Tonight we balanced the coils of the lower stages of MC2 SRM and SR2. The MC2 notes attached are explaining the procedure in detail. Below is summarized the ASD ratio after/before the exercise for each suspension and each level.
For some reason M3 stage of SR2 was harder to balance than the other ones, so we gave up on it for now and will come back to it later.

And the gains which were found optimum for each coils

Measurements will be running overnight to measure the cross couplings transfer functions for SR2 SRM and MC2

This plot is interesting.  It seems the only moderately pronounced peak in the horizontal ground spectrum wanders, seen from 8 to 11hz changing quite rapidly.

The attached plot's current traces are with HEPI loops closed and the ISI Damped.  While the middle graph shows all four local IPSs have the strong 8hz peak (the dashed REFs are with the HEPI loops open), the peak only shows in the X & Y and not the RZ cartesian traces (top graph).  Also, note the bottom graph where the ground sensor pretty much has nothing at 8hz but does have a minor peak just above 9hz that is also peaking up in the local sensors.

The second plot shows just the ground Seismometer with X & Y traces from last night (Dashed) and the others from this morning. The peaks in that area come and go and wander around so it may or may not be a problem or just a red herring (are those edible?)

This morning after Jim locked the BSC1 ISI, I applied First Contact to the ITMy CP-AR surface via the spray cone technique.  We then made final preps to the SUS locking down nuts, closing the ring heater, etc.

Particle counts in chamber before we started, but after Mitch had walked through for access to the X-spool ~an hour earlier:

0.3um  30

0.5um  10

1.0um  10

Particle counts after FC spraying was done, taken nearish door ~10 mins after spraying complete, 3 people working in chamber:

0.3um  840

0.5um  430

1.0um  260

Greg also looked at the TCS mirrors in BSC2 while we were there - more from him later I suspect.

We wiped our way out of BSC2 and BSC1.

I then went into BSC3 and wiped the floor.

We broke for lunch. 

After lunch we used the N2 gun and removed the FC from the CPx-AR and ITMx-HR.  We then alternated blowing on the ITMx-HR and gap between optics for 1 min intervals until each set of surfaces had seen ~5min of N2 deionization at 10psi.  I blew the barrels a little while as well.

After unclamping the TM and CP, we set the 1" witness optic and the 3" witness plate on the QUAD SUS and 1 3" WP horizontally on the floor in the center of the chamber.  A quick check of TFs in V, P, and T showed a healthy suspension, so we closed the BSC3 door.

Moving down to BSC2, we pulled the FC on the BS-AR.  It tore across the top and then as we pulled it down across the optic it left 2 ~2mm chunks of FC in the center ~4 inches of the optic.  We determined that we would need to respray clean this surface (phiszzll) so we aborted the BSC2 and BSC1 chamber closeout.

We pulled the BS-HR FC to make sure it wouldn't leave anything else either.

Jim locked the BSC2 ISI again and we mounted the FC spray cone to respray FC on the BS-AR and HR surfaces.  We reinforced the edges of the sheets with paint-on FC as usual.  Tomorrow we will reattempt to pull the BS and ITMx FC sheets and move on to close these chambers.