Richard Savage, Michael Vargas, Forrest Shriver, Darkhan Tuyenbayev.

Pcal transmitter module was delivered and installed on top of the pylon at the EndX station.
Pcal receiver module parts were delivered to the EndX station. The module was assembled and installed into the pylon, but not yet aligned.

Port (window) shutter was installed on the receiver side.

Enclosure of the receiver module is currently not installed. Proximity sensors for receiver module enclosure have been tested, but were removed for additional tests.

Jim and Dave.

We noticed that the h1iopsusey ADC bit (3rd bit) in the STATE_WORD has been coming on since wednesday evening. The IOP model was upgraded to RCG2.9 at noon on wednesday. We downgraded the IOP model to RCG2.8.4 this morning, and took the opportunity to also downgrade the h1susetmy and h1sustmsy models. No DAQ restart was required.

Calum, Kate, Rich A, Nichole, Betsy

Reporting for the team last night:

While in the corner BSCs for First Contact work, we also detached the BS elliptical baffles which were mounted to the BS SUS structure.  We staged the new gold wire-protection baffle parts and ran through how they attach.  We will wait until the BS optic has First Contact on it before attaching the new baffles and reattaching the elliptical baffles.

Calum, Kate, Rich A, Nichole, Betsy

Reporting for the team last night:

After collecting all of the required equipment, we started the ITMx First Contact cleaning at ~5pm yesterday.  We used the spray cone to apply a nice coating to the CP-AR and then to the ITMx-HR.  When we did the ITMx-HR we had to slide the ACB wedge part way out in order to have the ACB swing back in such a way to not interfere with the spray cone attached to the front of the QUAD structure.  Reportedly there is a new cone somewhere that does not interfere with the ACB fully swung back.  Will continue tracking said cone.  The plan is to clean the chamber and continue with other mechanical closeout items before pulling the FC and closing the chamber door (the typical procedure).

Prior to starting the First COntacting of the ITMx-HR surface, we attached the green lantern fixture and inspected for particulate on the surface of the optic.  A few weeks ago, we used the fixture to spot ~2 particles per sq. inch on this surface.  Since then, much in-chamber activity has taken place.  Yesterday, we spotted ~5-10 particles per sq. inch.  We should inspect after we pull the FC.

K. Izumi, Matt
The bypass mirrors and the irises have been removed from HAM2s 2 and 3. The MC3 AR baffle (I believe its called) has also been put back into position

Particel counts:
HAM3: In cleanroom
0.3um...10 counts
rest..... zero

In chamber
0.3um.....30 counts
0.5um..10 counts
rest..... zero

HAM2:
In cleanroom
0.3um....10 counts
rest..... zero

In Chamber
all..... zero

Filiberto, Rich

Motivated by the observation of oscillations on an AA/AI circuit board when loaded by a long cable in the LLO ESD system (and per Rana's suggestion), we performed a stability analysis on the version 6 AA/AI circuit board.

A version 6 AA/AI board was loaded with ~120 feet of typical twisted pair.  The output of one channel of the circuit board was driven through a 470 ohm resistor using a function generator running a 1kHz square wave at 2Vp-p.  The cable-loaded opamp output was then observed on an oscilloscope to watch the perturbed response of the opamp.  By observing the opamp output at the edges of square wave, any tendency toward instability can be detected as excessive ringing.  These observations were done while varying the output DC level to check if the stability is a function of output DC level.  Actually, the DC variation test could be flawed in that a significant load was present from the 470 ohm resistor in series with the function generator.  A better test would have been to AC couple the function generator to avoid being mislead by the excessive loading of the 470 ohm resistor in series with the function generator.

No tendency to oscillate was seen on the version 6 circuit boards.  As a further test, the cable loaded opamp was loaded with an additional 0.22uF fixed capacitor and no instability tendency was noted.

As a sanity check, we took a version 4 AA/AI board and found it unstable with even a moderate cable load (60 feet vs. 120 feet).  Even a ~12 feet of RG58 was enough to get the version 4 board to show instability at 4MHz or so.  

This is Justin.

Per discussion in the morning meeting I have attenuated the power going into the IMC via the rotation stage. HWP set at 63degrees..corresponding to around 200mW. locked out power circuit when work completed.

• Discussions for closeout work over the next few days (see calendar on white board!)
• ITMy:  Travis may get to some work here, but mostly focused on helping out w/ closeouts
• PCal work contin at EX
• Update on Ionizer work at EY
• Revert EY model work to 2.8.4 (Jamie)
• EY:  swap sei coil drivers for one modified for hardware watch dog

model restarts logged for Thu 17/Jul/2014
2014_07_17 15:22 h1susetmy

rcg2.9 work on etmy.

J. Kissel, K. Izumi

After using the (new) in-vac ISS QPD on the "second-loop" ISS array a bit this past week, we've made two changes to the H1:PSL-ISS_SECONDLOOP_QPD_SUM filter bank, which comes with the generic CDS Simulink library part
/opt/rtcds/userapps/release/isc/common/models/QPD.mdl 
used in the h1psliss front-end model to represent it:
(1) Installed a low-pass filter ( zpk([],[0.01;0.1],1,"n") )
(2) Changed the gain to -1, to invert the SUM which comes in negative.
(1) makes determining whether the beam is on the QPD much easier in low-to-no light scenarios, and (2) is removing the analog inversion that seems common to aLIGO QPDs. A negative sum is less than the lower limit (1e-6) of the saturation block that's a part of the normalization scheme -- which means the PIT and YAW signals were always getting divided by 1e-6 creating ridiculously large numbers cut-off by the MEDM display.  

I've modified and committed the 
/opt/rtcds/userapps/release/psl/h1/burtfiles/iss/safe.snap
such that these settings stick after a reboot.

Things that still need to be fixed:
The link to the FULL version of the SUM filter is broken. I think it's related to the generic macro variables passed down from screen to screen, but as far as I can tell the screen it's calling exists...

I installed the RTD temperature sensors on HAM 4 and 5. The existing HAM 4 RTD that was broken, Alog 11942, was replaced with a new RTD (D1102257-01 V1 SN# S1201366). HAM 5 had a functional RTD hooked up to the cable mount thanks to SUS, so the install went quickly enough. All of the sensor ends seemed to survive, but confirmation will have to wait until at least tomorrow when an impedance test can be done.

The particle counts were good going into chamber.
HAM 4 clean room: 0
HAM 4 chamber: 0

HAM 5 clean room: 0
HAM 5 chamber: 0

For the alignment work, all particle counts read zero in chamber in HAMs2, 3, and 5 (I was suprised at this being the case for 5)

Prior to balancing work beginning on HAM5, I locked the SRM and SR3 intermediate and bottom stage masses. I also tried to dress the cables as best that I could. Unfortunately the bolt holding the peek cable clamp feels galled so cant do up clamp well, so the cables are kind of just hooked onto the clamp. its not at all pretty, but hopefully will be fine. If had more time would of liked it to be better.

The SEI guys balanced HAM 5 and I then went and unlocked SRM and SR3. Hugh then unlocked the ISI and pulled the covers off the ISI  for testing to begin

For HAM4 balancing we decided to leave SR2 unlocked because we didnt think the ISI would have to have much adjustment, if any at all. So it was left unlocked during balancing, the ISI balance checked and the covers are now pulled back from the ISI for testing to begin

Thus SR2, SRM, and SR3 should all be unlocked....and hopefully free. I have not unlocked them into their "final state" as they need to be locked up again so that they can be first contacted

WHAM4

The HAM4 level balance was fine.  There is one horizontal locker that shifts 1750counts (our spec is 1600) but all others are less than a few 100.  Adjusting the locker to correct this will only change the locked position; the floating position will not change.  See the first attached plot for the shift from locked (whence alignment has been done) at the start of these trends, to the unlocked position at the end of the traces.  The Rz is the likely most significant at 15urads, Rx is 10urads with Ry at 3urads.

WHAM5

HAM5 required some mass shifting to balance the level.  HAM5 H1 is a bit worse than HAM4 with a shift of 2500counts.  See the second attached for the cartesian shifts.  Note Rz is 30urads.

M. Heintze, K. Izumi, J. Kissel

Ah what wonders a break can bring. Kiwamu did some trending during the break to discover I was reading the OSEM Witness Sensors incorrectly. We had way over-shot where we needed to be in pitch, which we believe to be the source of the yaw misalignment. After a few more turns of the pitch adjuster back towards where we needed to be, we regained a spot on the REFL WFSs, and were able to restore the IM4 mechanical alignment to the former, close-to-saturation digital alignment. See attached screenshots of REFL WFS screens, for a before and after. 

IM4 baffle has been restored, and tools removed from the table. As an act of caution, we'll keep the bypass path in until tomorrow lest we need it again for some terrible, terrible reason.

Final alignment values for all suspensions are also attached.

P.S. Next time we bypass the IMC, let's use optic mounts which are less sensitive to fairy kisses.

Enough of the alignment of the corner station optics had been completed enough to free up the BS and ITMy for chamber closeout preps.  So, I locked the ITMy test mass and CP mass in prep for First Contact cleaning.  Although the ISI is not yet locked, we all decided it was OK for me to lock the BS optic and it's PUM, so I did that too while I was in the BSCs.

Betsy, Filiberto, Rai, Calum, Rich

We successfully repaired two elements (1&5) that were shorted by one of the wires that suspends the compensation plate (CP) on ITMY.  Rai machined two tools (2mm wide razor chisel and a carbide cutting tool fashioned into another tiny chisel) for us to use to remove a small portion of the gold mask on the CP.  The tools worked very well and we were able to cut two ~2mm gaps in the gold traces thus eliminating the short circuit path.

Everything went well.  After cutting the gaps, we checked that each wire had proper continuity from the airside of the vacuum feedthrough all the way to each pattern on the CP ESD mask.  From the airside of the vacuum feedthrough, each of the 5 center conductors were HIPOT tested at 1kV to chamber ground for 1 second with the tester set to alarm at 300uA.  The same HIPOT test was performed between each isolated shield and chamber ground.  All connections are normal.

There was a report of at least one problem with the 5-way coaxial connector on the vacuum side of the vacuum feedthrough that will require rework at a later date.  Once the majority of the doors are back on the chambers, there will be decent positive pressure such that the feedthrough can be taken off and the cable pulled through into the air and reworked in situ.  We have done this successfully on other similar connections.  Filiberto and I went through the necessary steps to repair that connector when the time is right.

Betsy is taking a couple of photos of the repair to be posted soon.