Mark B. Picking up where I left off on Friday, aiming towards getting TFs.
We have put all of the H2 CDS code into the cds_user_apps SVN repository. I have created a One Arm Tag to archive the code base for H2 as it was at the end of the OAT run. H2 BSC6 commissioners may now transition the code away from the OAT configuration.
- Cheryl, Deepak, Luke The 3" steering mirror behind PR2 was installed in HAM3. The 3" black glass that sits behind the mirror in it's mount turned out to be more like 2.8", so the set screw is almost fully through it's threaded hole, and does firmly hold the black glass in place. The 3" optic had the First Contact removed from the back surface, and there appeared to be possible FC left around the very edge in a number of places. I wiped the edge with acetone, and some features were removed, but most remained, and after looking at it with Betsy, it seemed like the features could be the edge of the AR coating. I put the optic in it's mount, with the HR side still covered with FC, and we installed it into HAM3. Work installing into HAM3 will continue on Monday.
* Black glasses and clips used for all ISC mirrors were found and are ready to be installed (but IO black glasses are not yet ready). As noted before, this can be done later.
* Sled is ready as noted before.
* Picomotor interface and the manual driver are ready so we can test picomotors in chamber once they're installed.
* Ditto for QPD.
The final distributed piping on HAM4 was completed today. The distributed tubing from BSC8 has been reinstalled on BSC1. And a little more of the temporary tubing was removed. The main supply & return lines are what remains.
Due to concerns of improper strains placed on the glass via the metal secondary prism, the prisms were removed from the MC1 and MC3 optic barrels. These will be reglued on with a new curing procedure shortly. The debonding process, E1200821, took ~3-4 hours of continual "baby sitting" by me and Gerardo to keep the prism joint wet with acetone.
JimW MitchellR & GregG The crew got a portion of the Sensors installed on to the ISI. These included the Trilliums and the Vertical L4-Cs & 1 Horizontal GS-13.
I put a dust monitor in the clean room over the ISI. It was set to location number 2 in the LVEA. It is in there but does not seem to be running correctly.
Mark Barton Travis reports that the OSEMs on the BSFM02 are adjusted so I'll be trying to take TFs. The Matlab scripts are a bit old, so it may be more debugging than taking data to begin with.
Mark B. As expected a lot of time was consumed in debugging (mostly getting the actuation going). Damping now works on L, T, P and Y, but enabling it on T or V produces ringing. Didn't get to TFs yet - need to go home now. Edited to add: By applying individual OSEM offsets I was able to confirm that the M1 magnet signs are correct.
We'll be using the BSC8 cables/controls/models to test BSFM02, so the FMy MEDM settings will be changed for this testing phase.
Attached are the new INMON settings for BSFM02 based on the OLVs measured this morning.
Mark Barton and Betsy Bland We created a directory, ^/trunk/BSFM/X1/BSFM02 , in the SUS SVN for the BSFM suspension about to be tested on the solid stack in the LVEA. Because it's Phase 1 testing, we declare it honorary X1, despite the facts that: * It was originally intended as H1:BS. * It is now slated to be repurposed as I1:BS. * It will be tested with H2:ITMy cabling and channels.
Travis, Betsy
The BS which had been built for H1 on the solid stack/test stand in the LVEA is now destined for India. (The FMy from BSC8 is due to become the new H1 BS.) Travis has resumed work on the BS in order to finish it and stow it for India, thus making space for the BSC8 rework for H1. In line with the standard way we had been naming suspensions, this BS is now being dubbed "BSFM02" as it will be built and tested only to Phase 1 prior to storage. BSFM02 has been coarsely aligned.
Attached are plots of dust counts > .5 microns approximately from 6 AM to 6 PM in particles per cubic foot.
We tuned the QPD sled Gouy telescope using the modemaster and a fiber coupled source. Basically copied LLO, however the difference in source parameter means that some of the things are different. Details about the source and the tuning parameters etc. will be detailed in T1200433, which is yet to be written.
Then we have centered the QPDs using hand held QPD LCD readout box (D1102092). QPD cables were clamped down on the sled.
(Turned out that the hand held box had a pin compatibility issue. I, Richard McCarthy and Rich Abbott talked, and Richard made a patch job so I can go on. Rich is going to modify the rest of the units at Caltech.)
We've wrapped it in a foil and put it in a big ameristat bag.
One caveat, though, is that it turned out that we don't have a suitable black glasses that fits the J-clamp for 1-inch optics (at least in the lab). Also, rectangular black glasses that are supposed to be installed just outside of the sled were too thick and didn't fit the V holders.
We will be able to install them when we go in to HAM3 for real alignment in the future, not this time.
Attached are a few photos from the build. ALL photos from work are in ResourceSpace, here.
[Stuart A, Jeff B] Following previous M1-M1 TF measurements taken for PRM (HSTS) which exhibited signs of environmental noise coupling into the Role and Pitch DOFs (see LHO aLOG entry 4232), TFs have now been re-taken during a quieter period. The first plot (2012-09-20_1215_X1SUSPRM_M1_ALL_TFs.pdf) shows a comparison between PRM and the HSTS model. The second plot (allhstss_2012-09-20_1445_All_Phase1b_HSTSs_ALL_ZOOMED_TFs.pdf) shows a comparison between PRM and every other HSTS suspension that has completed Phase 1b testing for both sites. The TFs obtained for PRM are in good agreement with the model, and fall within the scatter of modal peaks observed for other suspensions. Therefore, this should now finally complete Phase 1b testing of this suspension. All data, plots, results and scripts have been committed to the SusSVN as of this entry.
JimW GregG & Hugh & the fantastic Cleaning Crew Karen & Christina! The cleanroom was spotless and the can was polished. We pulled the lid and drove the ISI on the container base into the cleanroom. It will start getting podded tomorrow
EricA JimP Keith Filiberto & Hugh We continued emptying the last of the fluid in the lines. Eric disconnected the BSC8 chamber tubing from the 4-way valves and plugged the tubing. Then he removed the Accumulators from the Manifolds. Jim & Keith then took the tubing out from the BSC. The supply mains were then pulled east and cut to extract them from the OMC area. THere are a few hangers etc on the chamber but those will be pulled in the AM. All the cable pulling is compete, CPS racks are removed as are the Dial Indicator trees. Do we have to pull the Cable trays to put in the Walking Plates? Do we need the Walking Plates?
I went in to diagnose what might be causing the anomalous 11Hz peak and found that the Top Stage blade EQ stop (aka the goalpost) was locking the right side blade down. I released this, then made a few small adjustments to correct for the now fully suspended chain/BOSEM alignment.