Transfer functions are running over the weekend on HAM2-ISI as well.

HAM2 was unlocked. It was a bit difficult the get the tight covers to stay away from the ISI without the rods we usually have (used on HAM3, see attached pictures). I added a couple clamps to keep the sheet in place over the weekend.

Installed the periscope inside chamber, but it does not look right, there is no clear line of sight, the BS elliptical baffle is on the way.
We are going to continue to work on it next week.

Transfer Functions are running over the weekend on HAM3-ISI. 

The HAM-ISI master models were recently updated. We took a quick set of transfer functions (1 average) to make sure everything was OK.  Time series for the CPS signals are attached.

The temperature controller for the SHG on ISCT1 is now working.  

I had made a mistake in copying over the system manager from the test set up to the corner, which would be easy to repeat.  There are two inputs from the resistance measurement terminal, EL3692, there is SAI Inputs Channel 1 which has the status bits and something called value, which looks like the resistor value if you look at it in the online tab, but doesn't actually work, the one to use is under SAI Inputs Real Channel 1.  

Szymon and Mark B.

We extensively revised the TMTS model using first article data from Ken Mailand. The preferred model is now at

^/trunk/Common/MatlabTools/DoubleModel_Production/tmtsfa.m

In conjunction with the DTT data plotting script

^/trunk/TMTS/Common/MatlabTools/plotTMTS_dtttfs.m

it gives a respectable fit to measured data:

^/trunk/TMTS/H1/TMSY/SAGM1/Results/2013-03-14_1936_H1SUSTMSY_M1.mat
^/trunk/TMTS/H1/TMSY/SAGM1/Results/2013-03-14_1936_H1SUSTMSY_M1_ALL_TFs.pdf

The biggest mismatch is that an R (Mathematica/Matlab pitch) mode predicted for 0.6 Hz is observed at more like 0.7 Hz. Everything else is pretty much bang on.

So, the afternoon BS FC application/removal indeed picked up the hazy 3" circle at the 3 o'clock position and the FC remnants at the center of the optic.  However, there are now little "splatter dots" across the ~entire surface, 1-3 every inch.  Some are a little circle like feature, as if we "sprayed something wet on it" and it dried in small dots - ha.  So, I'm certain these are from the FC spray drying faster than I could spray - even when I was anticipating this and sprayed fast to try to avoid this.  Possibly a subsequent FC cleaning could remove these, but I'm out of time to keep performing this few hour long task again and again.  Will confer with CIT regarding cleaning in 2 months.

Arnaud and Travis finished reassembling the BS EQ stops and ellipt baffle and took B & K measurements, so we are done there.

Note, we have officially walked away from HAM 2/3, turning them over to SEI who are now TF'ing.  Which brings me to the PRM - the FC cleaning of this guy was a failure as there is major smearing/contaminant on the HR surface (see pic 3 attached).  Of course, this is the one I did completely by myself without the Margot/Kate help, so apparently I did something wrong although not sure what since I was following their procedure and working with them.  Michael reminds me that we do not used PRM in HIFOy so we will revisit cleaning on PRM again in 2 months.  The MC1 - 3 FC cleaning this week removed some particulate although all 3 mirrors have a few particles within the central 1" area - particulate that I could not blow off with deion' N2.

Phew - SUS is finally done in HAM2, 3, and BSC2 - for NOW.

Sheila, Kiwamu

 We went to the PSL room today to look for any sign of the beam distortion which we saw yesterday on ISCT1 [1].
However there was no obvious sign of the distortion in the PSL.
We are planning to look at the beam around the light pipe by removing it once we transition to laser hazard.

 We brought a Thorlab beam scan to check the shape of the beam in the downstream after the ALS Faraday. We checked the beam shape at various points : (1) right after the first lens behind the Faraday, (2)  before the first steering mirror (~30 cm afar from the 1st lens), (3) right after the lower periscope mirror and (4) right before it enters the penetration hole. None of them showed any obvious sign and they looked quite "Gaussian" copmared with the software fitting curve on them. Probably it is unlikely that the source of the distortion is in the PSL side.

[1] LHO alog 6050 " ISCT1 work"
 

08:00 Reset all the alarm handlers 
08:30 DOE start seismic testing (Local)
08:45 LVEA Transitioned to Laser Safe – Michael R
08:55 Start Transfer Functions on HAM2/HAM3 suspensions – Arnaud P.
09:00 Patrick drive to End Y to check on Dust Monitor
09:15 Start work on BSC2 Beam Splitter – Travis S.
10:00 Reset Watchdogs on PSL – Michael R
10:10 Start assembly work on H2 LAE PCAL – Pablo/Michael R.
11:15 DOE stop seismic testing
11:25 Dust Monitor Installation on End Y - Patrick
14:00 DOE restart seismic testing
15:00   Start B&K Hammer Measurements on BSC2 Beam Splitter – Arnaud/Travis
15:55 Start measurements on HAM 3 ISI – Hugo P

Pablo, Michael R

We began assembling our second periscope structure in the H2 PSL room. We have the installed the struts, lifting block, suspension rings, and have attached the two large plates together through these pieces. We installed helicoils on plate -727, but we need to torque our screws down before we can flip the structure to get to the other plate.

Yesterday, we pulled the BSC2 CPS racks so Filiberto could do some mods to the cards. This afternoon the now fixed (we hope!) racks were replaced at BSC2. These are currently the only CPSs on site that have been modified. The rest are planned to be done during pumpdown over the next couple of weeks.

HAM3 ISI is unlocked. Hugo will be starting TFs soon, so steer clear, please.

Today, Travis pulled the FC sheet on the BS optic, in prep for final SUS pointing measurements now that the SEI actuator housings have been attached.  However, the sheet did not come off cleanly and there are numerous bits of very thin FC in the center of the optic, specifically where the thin windows were.  As well, there is a full circle of haze where one of the thinner FC windows was pulled off at the 3 o'clock position.  So, we sprinted to get the BS FC spray cone cleaned (no time for full class B at this point, but these are a tool that do not touch hardly anything so we're going with it) and will attempt a recleaning this afternoon.  Note, I can't leave the FC sheet on because IAS/AOS need to see through the BS in order to look at the position of the elliptical baffle boxes (shown in the back ground of many pictures linked below).

Recall that the FC-HR sheet originating from CIT many months ago looked like this:

I and Joe went to EY and checked the viewports there, and everything is good.

BSC6: 4/4, all good.

H2 EY adapter A-17B: 5/4, we have one viewport more than we need.

• One video port (FETM-Y Video 2, VP9) is populated but not used.
• Pcal viewports (VP8 and VP3) are used for video and illuminator.

MC1 transfer functions ran last night before closing HAM2 chamber look very good.

Measurements can be found attached :

• "allhsts[...]" comparing M1 to M1 MC1 (HSTS) model, phase 3a LHO measurement (April 11th 2013) damping on, damping off, and LLO phase 3b (oct 2012) damping off
• "2013-04-11" comparing model and M1 to M1 transfer functions damping off, with cross couplings
• "2013-04-12" comparing model and M1 to M1 transfer functions damping on, with cross couplings

The svn will be updated by the end of the day when measurements will be done

Starting several rounds of transfer functions overnight for phase 3a testing prior closing HAM2 HAM3 chamber.
Measurements will run until tomorrow afternoon, and will be paused if needed to go in chamber.

Modified capacitive position sensors per E1300251 for BSC2. This was to address a high frequency oscillation in the return path.

Filiberto Clara