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.

(Andres, Cheryl, Corey, Jeff)

Upper Mass Clamped To ISI

This morning the Upper Mass (already under the ISI on the Genie) was raised up on to the ISI (before that happened, Vibration Absorbers were moved to their correct positions)  This was fairly straightforward.  There were a few issues with a couple of clamps.  Two clamps had to vary from the drawing (D0902163) because the ISI's Stage0 made installing the dog clamp's screws not possible.  Then one of these screws also fell into a hole of Stage0 (think it can be fetched out by removing a dog clamp and using a tool to extract the screw).  So, Upper Mass for all intents and purposes is clamped/torqued on the ISI.

Table/Telescope Staged for Cleaning & Install

Next up is rolling the "lower Assy" (i.e. Table & Telescope) under the Upper Mass and connecting Upper Mass SUS wires to the "lower mass".  Before doing this, some tooling was staged, and then the Lower Assy was set up for inspecting/blowing dust off its optics.  I have the Table/Telescope set up in the TMS Lab in such a way that it is in a dark area of the lab and it is easier to inspect the mirrors with flashlight.  I went through a first round of blowing particles off the Telescope mirrors.  I probably removed 40% of particles.  But the remaining particles were pretty pesky, and I leave that for Cheryl to work on. 

Once the optics are clean, we'll be ready to roll the Lower Assembly into the VEA (probably after lunch on Wed) & attach it to the Upper Mass.

I installed and ran the new FSS autolocker code. Changes include:

- Ability to engage the autolocker when the FSS is already locked - without killing the lock!
- Three independent delay epics records for states 1, 2 and 3. Their names and for now reasonable operating values are:
    H1:PSL-FSS_AUTOLOCK_DELAY1 = 5 sec
    H1:PSL-FSS_AUTOLOCK_DELAY2 = 1 sec
    H1:PSL-FSS_AUTOLOCK_DELAY3 = 0.1 sec
- On state 4 lock-loss, hold temperature output and try state 2 again (ramping up FSS gain)
- A switching integrator in FM1 of the TEMP_LOOP. I loaded the following filters:
    FM1: p0:z0.05 (pole at 0Hz, zero at 0.05Hz, high frequency gain of 1 - this is the switchable integrator.)
    FM2: p500:g0.01 (pole at 500Hz, low frequency gain of 0.01).
    FM10 (not used) a copy of the old lowpass (the two new filters together are equal to the old lowpass, except that we now have a true integrator instead of a pole at 0.005Hz)
  The FM1 switchable integrator is turned off in state 0 and 1 to clear the integrator history.

I didn't have a mode cleaner tonight, so we will have to check the fast-recovery feature through state 2 tomorrow.
Other than that, the system behaved as advertised.


Related items that will need to be checked in to the svn (I am holding off to test is a bit more before propagating it to LLO without warning.):
/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  (new file - already in svn)


PS: On request from Christina I left the FSS and TEMP loop off overnight - the PSL temperature is still recovering form the fan speed change.

The last measurements have to be done when all the fans inside the PSL are off, so I switched into science mode for the night to do the measurements tomorrow morning. Afterwards I will switch backto commisioning mode to work inside the enclosure again.

For reference, here is NPRO characterization paper from Patrick and Benno.

The laser currently installed in H1 is 1639F, i.e. "F" in the paper. 

- Corey, Andres, Jeff, Cheryl

TMS Upper structure was attached to the ISI today.  Cables are routed to head toward their ISI brackets.  Jeff and Andres dressed the cables coming through the upper mass to be not touching the upper mass or rubbing against eachother.  One issue with dog clamps came up - waiting on an answer from SYS for a fix, if any change is necessary.  One wayward bolt may need to be rescued from the top of stage0, with no chance of moving on it's own.

I started cleaning optics on the ISC table, and the lights from the clean room were so strong I could not see the particulate on the optics that I easily observed before.  Possible that Corey's cleaning got a lot, but big particles on two optics that I've been tracking were still there.   Some options are to cover more lights with foil, or move the telescope down to the darker end of the room.  Doesn't look like the clean room is wired so I can turn lights off without turning the fans off, but maybe I missed something.

The amount of change sensed by the dial indicators imply that we will pass an IAS scan.  Largest changes are <0.2mm but we'll do the survey anyway.  Hopefully that will conclude tomorrow.  We'll follow that with ISI unlocking and door install.  HEPI electronics (removed for Actuator attachment) will be reinstalled and testing begun.

Dave and Jim,

We had compiled all models against RCG 2.7.2 yesterday. This morning we installed and restarted these models using the sequence:

• stop user models
• stop/start the iop model
• start user models

The PSL models were not recompiled nor restarted, that system is in use today by the PSL and AEI teams.

The h1lsc model needed a manual press of the BURT button on the GDS_TP medm screen to get it to start.

The h1isibs and h1isiitmx models showed an INI mismatch with the DAQ. Vincent made some more BSC ISI changes. After he was done, I restarted the DAQ. About half of the front ends went into a 0x2bad DAQ error. I restarted the MX_Streams on those systems which cleared the error.

The frontends which went into the bad state were sus(2a, 34, 56, ex) susaux(b123,h2,h34,h56,ex) sei(b2,b3) lsc0, asc0, iscex (total of 14)

We expect the upgrades to have fixed the erroneous Binary IO initial state readback, and the unresponsive matrices.

The DAQ was upgraded to 2.7.1 some time ago, the front ends went to 2.7.2 today (which has the addition of the matrices fix) to essentially complete the 2.7.1 upgrade.

Vendors on site today:  Sprague (X arm), Unifirst, Basin Disposal to empty cardboard dumpster and bring it back, Mount Lock & Key, Praxair for CP3.

Dave and Jim executed the upgrade and restart of the front ends.  They didn't do the PSL.

Work permits signed by ops today:  4097 (front ends), 4099 (HAM2,5,6 camera cables), 4100 (two clean room cleanings near HAM5; completed), 4101 (SEI model update/recompile), 4102 (autolocker).

Sporadic dust alarms today in the SUS test stand (LVEA) and in the optics lab/bake oven room.

Correct PSL enclosure phone numbers: H1 -- 113 (inside), 226 (outside).  H2 -- 114 (inside), 225 (outside).

Remember that the dust monitor map that used to reside on the CR white board now sits in the wiki at https://lhocds.ligo-wa.caltech.edu/wiki/DustMonitorLocations

For Optical Lever acceptance review, this data was requested.  This set will also be included in the testing and commissioning document for optical levers, T1300563.

Figure 1 shows the dark noise spectra in Volts/Hz^1/2, this is taken as individual segments at the ADC and then converted from counts to volts in DTT.

Figure 2 shows the transfer function between the OSEMS of the M0 stage and the L2 stage, this is using an excitation on the M0 stage of 200 counts uniformly at broadband frequencies.

Figure 3 shows the ITMY drift for 24 hours in pitch and yaw in units of microradians.  We see that over the course of 24 hours, pitch drifts ~2urad and yaw drifts ~1.5urad

Mark L., Eddy and I removed four LOS from the Optics Lab today. Three were headed for recycling per Michael Landry and one was packed into a crate for shipping to Steve Penn. We put shipping requests on the iLIGO optics cases headed for CIT: this included the two ETMs destined for KAGRA per Eiichi's request. Mark and Eddy carted everything ready for shipment to the LSB so Terry can work on the logistics. There were two cases full of SOS destined for MIT: these were hauled to X Mid Optics Lab for storage until MIT is ready to receive them. 

Three iLIGO large optics remain on-site: they are stored in cake tins in an Optics Lab cupboard. We will ship these to CIT when we get some cases back.

We assisted Jodi with removal of suspensions from the optics lab, some for shipment and some for recycle. 
Welded the tabs for the bread board on the leaner pier at End Y for Rick S.
Tyler worked in the machine shop on parts for Betsy.

For the ISIs, I updated the common model, edited the .ini list, localy rerouted the STS-2 paths, compiled, installed and restarted the models.
For the HEPIs, I localy rerouted the STS-2 paths, compiled, installed and restarted the models.

[Peter, Rick, Christina]

To have a look at the AOM double pass efficiency, we checked the RF power send to the AOM. It was 1.46W, which is too high. So we changed the attenution in front of the VCO from 9dB to 10dB (using an 8dB and a 2dB attenuator). That gave us 1.2W. 

Afterwards we optimized the alignment of the AOM and got a double pass efficiency of 72% (69.5mW to AOM, 59.5mW in single pass, 50.4mW after the EOM).

Because of realigning the AOM we had to optimize the alignment of the reference cavity and got 30mW transmitting with 50mW send into the cavity.

GregG ThomasV BetsyW

Installed the TCS RHs onto the suspension cage, the cables are routed up the side.  Will put the final touches on the cable routing and do a continuity/resistance check tomorrow.