Following previous aLog (7568) on PR2 top mass transfer functions, lower masses phase 3b transfer functions have been taken and measurements data have been processed. Plots attached are showing comparison with model and other hsts measurements

(1) H1 PR2 M2 to M2 undamped TF (July 2013 in pink) against L1 PRM M2 to M2 undamped TF (July 2013 in orange) against hsts model

(2) H1 PR2 M3 to M3 undamped TF (July 2013 in pink) against L1 PRM M3 to M3 undamped TF (July 2013 in orange) against hsts model

Looking at M2-M2 TF, the two highest resonnances of pitch (3.094 Hz and 3.641Hz) are shifted down compared with the model and LLO's measurement (3.216Hz and 3.778Hz). 

Those measurements have been taken with DTT and the xml templates are located on the svn under sus/trunk/HSTS/H1/PR2/{SAGM2 or SAGM3}/Data/2013-07-15_1900_H1SUSPR2_M2_WhiteNoise_{L or P or Y}_0p01to50Hz.xml

Data, plots and scripts have been commited to the svn

The legacy web pages from iligo (e.g. blue, ilog) are down at the moment. LDAS is looking into the problem.

Jeff B moved Dust monitor 15 from HAM5/6 cleanroom to small cleanroom just north of HAM 4 where suspensions are loitering. I have changed the wiki to reflect this.

Twenty days since last fill (8/9/13)---added 375mL distilled water this morning.

Last Friday Travis and I finished hanging the metal ITMx QUAD and adjusting out coarse alignment errors.

On Monday, I disassembled the lower metal masses and dummy wire segments from the ITMx QUAD.  The RH guys attached the RH (see their alog below).

On Tuesday, Gerardo, Travis and I moved the ITMx and CP optics from the LSB bonding lab to the LVEA.  The ergo arm was transported from Ex to the LVEA and recleaned.  Using the arm, we stuffed both optics into the ITMx QUAD currently hanging from the ISI on the LVEA test stand after first peeling the CP-HR and the ITMx-AR First Contact sheets (using N2).  Note, I had to fold the FC sheet on the CP-AR in all the way around it's edge since it's diameter was too large and the ergo arm could not get good suction on it to pick it up.  The suspension also had a coarse cleaning to blow off particulate prior to installing the optics - cleaning these suspensions is very difficult however since the equipment cannot reach the trapped areas and working real estate is so limited.

Yesterday, Travis and I attached the new loop wire segments to the main and reaction chains and fully suspended them.  No gross alignment errors observed, so prism placements and loop lengths are good!  We then proceded to lace the reaction chain cables.  We need to make some height adjustments and also plumb in the 12 top BOSEMs to get damping control before we can start taking IAS measurements, but we hope that will come together today/tomorrow.

- Jeff, Corey, Andres, Cheryl

Upper Structure:
- OSEM cables dressed on the upper mass
- cables that go through the upper mass are loosely bundled and tied to the ISI
- dog clamps that were adjusted yesterday were torqued to spec.
- telescope safety support beams were attached to the upper structure cube

TO DO:
- look at CB-3 cable bracket placement in D1300007-v2.  I put in a separate alog.
- redress upper mass cables after hanging the telescope.  The upper mass is sitting high, so cables attached to it need to be adjusted after it's back in position.  I worked on the cables coming through the upper mass in an attempt to have them not touch the upper mass and not rub against each other.  Many attempts failed and Jeff's idea to tie them together is our only option for having them not touch the upper mass.


ISC Table / Telescope:
- Corey cleaned all the ISC table optics with Top Gun
- he and I looked at a couple optics early in the day, and we both saw that the large particulate does come off pretty well, and the smaller particulate doesn't really budge - a familiar scene
- threaded rods that hold the protective cover for the ISC optics are in C&B overnight - they are a good 4" longer than necessary, and the extra threaded rod gets scraped as the protective cover is installed and removed, so I asked to have the extra length removed and the parts recleaned class-B


TO DO:
- revisit the telescope optics with Top Gun to remove any particulate that might have fallen from the ISC table

In D1300007 CB-3 is placed on the -Y side of the TMSX upper structure.  Betsy had moved the bracket, but after looking at the test stand today, I asked Jeff to install it in the original location.

When I look up D1300007, Betsy has a redline drawing, and placed the bracket on the +X side of the TMS upper structure, but this is not accessible from below the upper structure once the ISC table/telescope is in place.  Betsy's redline only claimed interference with the test stand, and there is no test stand interference for CB-3's original location.  Maybe Betsy's redline drawing didn't fully explain her thinking.  I sent her a text but didn't hear back.

Late today, after installing the safety support beams on TMS, it's clear that the real issue with the original placement of CB-3 is that there is only about 6" to access the bracket  from below, and access is between the telescope safety support beams (only 18" apart) - difficult and a risk to TMS.  

If the bracket must stay on the -Y side of the upper structure, my only suggestion is that moving CB-3 toward the QUAD cable brackets might allow slightly better access.  Alternatively, maybe the +X side of the upper structure can be accessed through the structure, so would work?  Either way, an alternative placement should be considered before bringing the TMS telescope under the ISI.

Kiwamu, Stefan

We brought the IMC back to test the new FSS code. It seems to work as advertised - in Kiwamu's words: "fantastic".

First we verified that we can manually lock the FSS, and then engage the autolocker without dropping lock.

Next we verified that that if the temperature is close enough, but the FSS is not locked, the autolocker immediately tries state 2. This trick also seems to work often under normal operations.

Next we locked the MC and kicked it as hard as we could (inverting the fast gain). This triggered the FSS autolocker to drop back to state 2 (with the temperature output frozen), but it came back up to state 4 after 1 sec.
The simple IMC autolocker also seems to work reliably - 10sec after inverting the fast gain, we were back up.

For the temp loop we also verified that the integrator hold in state 2 & 3, as well as the integrator clearing in state 0 works.

I checked in all relevant files to svn - revision 5533:
/opt/rtcds/userapps/release/psl/common/medm/PSL_FSS.adl
/opt/rtcds/userapps/release/psl/common/models/pslfss.mdl
/opt/rtcds/userapps/release/psl/common/src/fss/FSS_AUTOLOCKV2.c

In preparation of acceptance documentation, top mass PR2 transfer functions for phase 3b (in vacuum) have been measured during the night of August 5th 2013. Plots comparing model and previous measurements are attached below

(1) H1 undamped M1-M1 top mass transfer functions (in red) against hsts model (in blue)

(2) H1 damped M1-M1 top mass transfer functions (in red) against hsts model (in blue) 

(3) H1 PR2 undamped phase 3a (pink) (in air, in chamber april 2013 ), H1 PR2 undamped phase 3b (cyan) (in vacuum, August 2013), L1 PR2 undamped phase 3a (orange) (in air June 2013)

Measurements are showing good agreement with previous data from LHO. Cross coupling in pitch is still present

At 2pm we transitioned the LAE to commisioning mode again. As Rick recommended we increased the temperature inside the room to match with the temperature in science mode operation. 

We reduced the power send to the PMc to the same level available in Low-Power-Mode (14W) and adjusted the PMC, ISS and FSS loop to that power level. We have not turned the high power oscillator off, yet, to perform a set of DBB measurements tomorrow morning. 

The DBB had to be realigned because of wrong settings in the snap file which was loaded after the power outage this weekend. 

I also adjusted the half-wave plate downstream of the PMC to send 1.5W in the IO path and checked that the power in front of the lower periscope mirror was only 0.94W. 

At 5pm I switched back to science mode operation of the LAE.

08:30 Contractor arrived to work on vinyl flooring
09:09 Hugh and Greg going to HAM6 to work on HEPI
09:10 Cyrus going to end Y to work in computer racks
09:15 Corey going to end X to begin work for TMS install onto test stand
09:35 Travis going to LVEA test stand to work on ITM
11:22 Apollo craned a Genie lift over the Y arm
13:11 Water samples taken from site
13:22 Filiberto going to LVEA to run a power cable over HAM2

PSL environment channels occasionally briefly going invalid

Today we completed assembly of the work platform around BSC 3 with the exception of 1 section of handrail that interferes with some annulus piping on GV2. I have talked with Kyle and we should be able to remedy this quite easily.
Transported a 3 step platform to end x for Cheryl to use in the clean room.
Tyler worked in the machine shop, still working on parts for SUS (Betsy) and a small job for Filiberto.
The flooring guys are approximately 85% complete with vinyl, they will come back tomorrow to weld joints and trim out.
 

Before lunch I got the sign off on the Optical Table position from IAS (Jason;) I expect you'll see an entry from him shortly.  This was preceded by an elevation survey performed by myself and GregG:

Our initial level had an 11mil runout about 4mils low per target (D1100398/E1000403).  We did a couple small large Spring adjustments and finished at <8mils runout at -220.1mm average elevation Gz (0 error from spec.)

After IAS was done, I activated the CPS, recorded locked positions and then unlocked the IAS.  I repeated the lock and unlock recording the CPS all around.  The largest change observed was <1200cts or 0.04mm, comfortably under our <1600 cts max lock/unlock change.

WHAM6 has dummy payload on viton suitable for testing and is ready for doors.

One final thing--conferring with Bubba/Apollo: I will lock the HEPI this afternoon and will not install HEPI electronics.  Will keep the Dial Indicators in place to monitor HEPI position--please respect these.

Last night, Christina Bogan transitioned to "Science Mode" in which all non-essential heat sources, lights, HVAC fans, etc. are shut down for her PSL characterization measurements at about 8PM.

The attached plot (20 hours) shows the temperature transient that resulted.  Note that two significant heat sources, the TTFSS and the ISS AOM driver reside at the south end of the table.

To reduce the magnitude of the transient, we will try operating the room in Commissioning Mode at 4 to 5 deg. F higher temperature.

Attached are plots of dust counts requested from 4 PM August 26 to 4 PM August 27.

Attached are plots of dust counts requested from 4 PM August 25 to 4 PM August 26.