MCL PZTs used for ALS injection alignment on the ISCTEX|Y have strange convention.

X=PIT (rotation around X or horizontal axis)

Y=YAW (rotation around Y or vertical axis)

Also the gain of the internal feedback is set to the highest, which seems to cause a large oscillation for 2" optic. You need to open the chassis and move the jumper to reduce the bandwidth.

See https://dcc.ligo.org/e1300870.

Attached is a 4 day trend plot with the IPS readings at BSC3 during the final alignment on Monday 11 November.  Here are the numbers:

If you look at the plot, you'll see that the readings have drifted since alignment from the table values but things just look to be settling and no shift is larger than 0.001" (655cts/mil).  The apparantly large shift (it really isn' that large) on the verticals ~1/2+ way through the plot is maybe the corner cube removal.

HEPI Actuators were locked this morning for the door removal.   Locked position is within 0.001" of unlocked values.

I logged the OMC OLs for Jeff B:

prettyOSEMgains('H1','OMC')

M1T1 20997 1.429 -10499
M1T2 21195 1.415 -10598
M1T3 23620 1.270 -11810
M1LF 22733 1.320 -11366
M1RT 21724 1.381 -10862
M1SD 22193 1.352 -11096
 

Gerardo and Gerardo Jr. are bonding ears to PUM-ETM06.  As of yesterday 1 ear had been bonded.

Many things didn't make sense at first (see Sheila's alog) but anyway we injected the green beam into the chamber, adjusted the beam position on the first steering mirror, roughly aligned that mirror so the beam hits both of green QPDs, and started using ISCT mirrors to further align the beam to TMSX.

The green beam is already hitting the ETMX, the return beam is coming back to the secondary mirror but is not making it to the TMS ISC table yet.

Tomorrow, we'll continue with in-chamber alignment.

The pull list for end X has a lot of ?s on it, it was not clear what should be connected to what on the PZT controllers. When we first tried turning on the servos turning on the pitch servos would cause the spots to move away in yaw and vice versa, so we swapped the cables for the input to the MCL PZT controllers from X to Y.  After that the pitch servos cause the beam to drift of in pitch, and yaw in yaw.  Then Chris switched the sign of QPD B in pitch and swapped PZT1 and PZT 2 in yaw.  Now the servos seem to be working.  Clearly we need to measure the matrices in the morning.  

Alastair H. Greg G. Robert S. Thomas V.

We were able to complete the alignment of this set of mirrors tonight. One of the 10-24 vented SHCS on the back of the SM2 mirror in BSC2 got bound up and broke at the head but we decided to move forward with the installation and were able to get the mirror secured.  Although all the bolts are tightened down to their capacity on both mirrors, the alignment is still vulnerable to being bumped.

[Jim W. Travis S. Arnaud P.]

Today, and following yesterday's results we went in BSC3 chamber to take a new set of b&k measurements, and did a series of tests described below :

Test1 : X&Y hit ISI locked

Test2 : X&Y hit ISI locked with dog clamps tigthened

Test 3 : X&Y hit ISI unlocked with dog clamps tightened

The attached pdf is showing good and consistent results in both X and Y directions, for the 3 tests. See pictures for axis.

Several things to notice and conclude :

-The difference between ISI locked/unlocked seems only to affect the anti-resonnance at around 30Hz. Meaning, there's no need to take b&k measurement in chamber, but test stand is sufficient (at least for the quads/bs)

-Tightening the dog clamps didn't change the response above 30Hz

- None of the results from yesterday were reproducable

Results and scripts were commited under the svn

I've replaced the "Z" plate of the PR2 scraper baffle with the reworked version. This went very smoothly and I was able to do it without removing the assembly from the chamber. The new installation cookie cutter looks like it will work well and not interfere with any dog clamps however there is a table mass in the way of the correct baffle position. This mass seems to be in a different place than the one at LLO that should not interfere.
A few notes for the repeat job at LLO:
Tools required; 1/8, 9/64, 3/16 Allen keys
(It is helpful if the 1/8 key is cut down on the short end but not required)
-It is not necessary to completely disassemble the baffle assembly. Only the top side needs to be removed, however it is helpful to loosen all screws that don't need removal.
-After removing the old plate set it down on the HAM table in the correct orientation to remind yourself how the new one goes in.
-Leave all screws loose until the assembly is completed and then tighten.

While looking at TMSX medm screen, I realized that huge AC values were sent to the dac due to damping.

It seems like the damping was not in its right state because the input osem calibration filters were not engaged.

The picture below describes what filters to engage for the damping to be working : There's a "to_um" to engage at the osem bank, and a "from_um" at the damping bank to compensate for the first one. It won't work if only one of them is engaged.

Measured and adjusted the RF power levels associated with the LO drive to the ASAIRA and ASAIRB demodulators (18, 45, 90 MHz)

45MHz to LSCAIR-A 
Changed pad at input to distribution amp to bring the RF drive level down by 3dB as measured at the demodulator end of the LO cable.  The pad was 2 dB, now it is 5dB.  The measured RF drive at the LO jack on the demodulator was 13.0dBm, and has now been reduced to 10.0dBm

18MHz to LSCAIR-B
Added at 2dB pad to the RF distribution panel such that the measured LO at the demodulator LO input is now 10.0dBM

90MHz to LSCAIR-B
Measured the LO drive at the demodulator LO input and found it to be 10.6dBm.  Decided to leave it at that as it's close enough.

J. Kissel, D. Barker, R. Bork, A. Pele

I had identified the problem (not aLOGged, appeared yesterday afternoon after the RCG upgrade) with the HAUX models early this morning to be a few, expected unconnected and cross-wired parts. This was because Dave had forgotten that I'd advertised the HAUX to be under-construction, and in his sweeping effort to recompile all models yesterday, accidentally compiled and installed this under-construction, known-to-be broken model. Honest mistake.

I patched up the under-construction model to get it working enough for basic operation early this morning, but then the temporarily-fixed model didn't compile because of RCG issues with bus selectors and creators. Rolf's currently hard at work on it, but in order to make progress with the installation of PSL ISS Outer Loop PD, we've just reverted to the known working svn copy of the model, which compiles just fine with Matlab 2012b, and RCG 2.8 (i.e. all the new stuff).

The svn copy of the model has been compiled, installed, restarted, and restored, and damps nicely as expected. The alignment offsets have been restored to whatever was in the safe.snap,
IM1 P   2330
    Y   -170
IM2 P   -1880
    Y   -300
IM3 P   2850
    Y   300
IM4 P   -2420
    Y   -980

Arnaud's gunna grab some trend data to compare against what alignment offsets were established earlier in the week, to see if they're different; he'll post a comment shortly.

This morning Travis, Jason and I made the ~last pitch alignment of the ETMx.  We also pulled the FC from the inside of the 2 East viewports and the ETMx CP-AR.  However, when we pulled the FC off of the CP-AR, the thin central portion of the sheet left segments of a ring around the center of the optic.  Par for the course.  And, of course, I could not get any good pictures of the feature so I'll attach a sketch shortly.  I'll get with COC to see what I should do - note, I cannot get the spray cone on to resheet the First COntact and start over, so either we'll need to live with these remnants, or I'll have to get crafty with a smaller cone.

But, back to the alignment - we aligned the ETMx to an offset pitch pointing such that when we pull the First Contact sheet from the HR surface, the optic bounces up to point the nominal pitch.  However, this does not help TMS with their alignment now.  After consult with IAS/TMS we decided to put the offset pitch onto the bias slider of the ETMx.  We have the range according to the uRad-calibrated bias slider, however Jason is going to go map it out and confirm the calibration of the slider with his optical equipment (still set up).  This should not take long, and he will leave the offset bias enabled for TMS to start their alignment asap.