This afternoon, HAM3 was locked, to allow various other sub-systems in to take pictures, make adjustments, etc. Meanwhile, Betsy and Calum installed the new baffle at HAM2, so Greg and I were able to go in and refloat that ISI. Somewhere in there, I also reconnected a disconnected CPS sensor. This could have been poorly attached, but I have also heard tell that people have been walking in the nozzles of this chamber. This should be done with extreme caution as the CPS feedthrus are particularly vulnerable, and would probably break if stepped on.

I attempted to start TFs on HAM2, but was foiled by an awgstream issue that I'm not smart enough to fix. Will try again in the morning.

[Jeff K. Arnaud P.]

The TF of ITMX ran over the week end from matlab 2012b, had the same issue that I encountered on friday morning. The log file saved gives the following error message :

[Warning: Channel H1:SUS-ITMX_L1_WIT_Y_DQ incorrect time 1068669185 (expected 1068669184).]
[Warning: Error in query for H1:SUS-ITMX_L1_WIT_Y_DQ: unknown error]
[Warning: Response channel H1:SUS-ITMX_L1_WIT_Y_DQ has sampling frequency higher than 256 Hz, decimating to the lower rate ...]
[> In get_sch_TF_MO_v9DQ_sma at 384
  In collect_schroeder_TF_v9DQ_sma at 479
  In Matlab_TFs at 499
  In LHO_Matlab_TFs at 141]
Error using decimate>validateinput (line 158)
The input signal X must be a double-precision vector.

So we investigated and fixed the problem which was basically :

Since we have higher sampling rates for the new witness channels recently implemented, (L1_WIT_$DOF_DQ / L2_WIT_$DOF_DQ), the function "get_sch_TF_M0_v9DQ_sma.m" was trying to downsample those channels to 256Hz right after getting the data out of the frame. If the function get_data failed (randomly the case), it would try to decimate an empty vector, and was returning the above error and quit the script. 

We modified get_sch_TF_M0_v9DQ_sma in order to make sure the data is beeing recovered in a while loop before decimating the signal.

I will run an other set of TF on ITMX tonight and commit the changes tomorrow if it succeeds

Alexa, Kiwamu, Rich

Did more in-vacuum installation work in HAM6.  Tip/Tilts and Beam Diverters are all installed.  The only remaining electrical devices to install are the Picomotors.  It's getting a bit busy in there, and we didn't want to add more stuff without talking to the alignment folks.  Dogged things down with one dog each anticipating they will be moved.

******USE CARE MOVING THE TIP/TILTS, I TOOK THE OPTICS OFF THEIR STOPS******

Missing a few key electronics items in the chain, so electrical checkout is still pending on all these items.

Tip/Tilt OM1
Serial Number of Tip/Tilt stage - 002
External Cable Number 236
Flange D6-F10
Internal vacuum cable S1106728

Tip/Tilt OM2
Serial Number of Tip/Tilt stage - 004
External Cable Number 237
Flange D6-F11
Internal vacuum cable S1106834

Tip/Tilt OM3
Serial Number of Tip/Tilt stage - 033
External Cable Number 238
Flange D6-F12
Internal vacuum cable S1106830

Beam Diverter #1 (AS)
Diverter Serial Number 012
Flange: D6-F8
External Cable 317
Internal Vacuum Cable (Flange to Table Bracket) S1202649
Short Cable (Bracket to Diverter) S1202732

Beam Diverter #1 (OMC REFL)
Diverter Serial Number 019
Flange: D6-F9
External Cable 316
Internal Vacuum Cable (Flange to Table Bracket) S1202652
Short Cable (Bracket to Diverter) S1202730

Robert S. Thomas V.

After adjusting the pylon positions for the HAM 2&3 optical levers to relieve pressure off the bellows, we needed to do a realignment of the in-chamber transceiver optics.  This was completed relatively smoothly and from an optical lever stand point, we're ready for pump down. Yay.

08:56 Louis going to end Y to work on cable cleanup on the VEA mezzanine
09:26 Betsy looking for parts in the LVEA
10:10 Mayflower metals to swap recycling bin
10:39 Justin transitioning the LVEA South Bay to laser hazard
Cleaning in end Y VEA
Cheryl, Kiwamu, Keita aligning the IMC
Kyle venting end Y
11:56 Cheryl going into HAM3
12:28 Cheryl, Kiwamu, Keita done with IMC work
12:29 Jeff B. done working in HAM6
13:25 Justin transitioned the LVEA to laser safe
Doug and Jason setting monuments at end Y
Calum, Kate, Norna installing baffle
14:34 - 14:50 Richard on corner station roof
Apollo breaking bolts on cyropump spool at end Y

I have disabled the broadcast storm control feature in the FE network ethernet switches.  I suspect the feature is dropping CA broadcast traffic when IOCs go offline, as the number of channels is significant for even one host; this will negatively impact the ability of systems to reconnect to channels when the come back up, and just extend the period of time the broadcasts are active.  There was a marked reduction in the level of dropped frames on the FE network when dc0 was changed to collect EPICS data via the OpenMX network, but there are still peaks of dropped traffic (at a reduced rate).

Koji A., Jeff B., Andres R., Jeff L.

The OMC was moved into HAM6 this morning.  The move from the cleanroom and into the chamber was smooth with no issues.  The OMC is sitting off to the North side of the ISI table to allow access for IAS.  The cookie cutter (used to position the OMC structure) is attached at the correct location on the ISI table for future use.  The structure is held with a few dog clamps.  The rest of the dog clamps, screws and washers are in a foil bag next to the structure in the chamber.

[Jeff B, Andres R, Rich A, Jeff L, Koji A]

We successfully resolved the grouding issue of the OMC preamps, thanks to the help provided from Peter K, Rick S, and Betsy B
for the necessary isulating materials. Here is the note for ourselves and someone who may work on this insulation for L1 and 3IFO.

The grounding of the ISC cables were caused by the mounting of the preamps (attached figrue, left). The PEEK washers
were used to isolate the bracket from the structure. In order to fit the wahsers, we had to trim them (only for the outer one) with crimpers.
In order to isolate the 1/4-20 screws from the hole walls, we used Kapton tubes. Since the diameter of the tube was too big
for the hole, we had to open the tube and trim it to reduce the number of turns. In addition, the metal washers should have
been removed as they sneakily caused the grounding with the preamp.

Peter King, Joe Gleason

We ran the cables coming from the ether-cat chassis into the PSL for the mechanized rotation stage and connected them to the controller box on the PSL table. We also connected the lock out mechanism cable to the box and ran that cable outside the PSL near the Light Pipe. The excess is coiled up behind the cooling pipes under the light pipe area and needs to have the lock out device attached and the box mounted to the wall. Once the lock out box is attached and mounted the stage can be tested and installed in the beam path with the HWP from the old stage. Currently the stage is sitting along side the mechanical stage on the PSL table.

After discussing the issue of an interfering table mass last week we elected to move the mass 2" in -Y to allow the PR2 scraper baffle to be installed in the correct location using the cookie cutter. There were no further issues encountered and the work is now complete. I placed the old baffle Z plate on a shelf in the clean room outside HAM2 that will need to be sent back to UF for modification.

I've run the latest security updates on the two CDS nameservers, and rebooted them this morning.

[Sheila and Kiwamu]

 The FSS wasn't locking this morning, interrupting PMC's lock. Lowering PSL-FSS_RESONANT_THRES from 0.9 to 0.5 fixed the issue. The alignment on the FSS reflection camera looked bad. It has been unclear why the FSS alignment kept drifting in pitch.

It appears to have crashed over the weekend.

There was an earthquake close by this morning at 06:47. SUS IOP watchdogs did not trip, looks like it was all over in less than a minute.

The plot is 10 minutes of second trends, starting at 06:40.

Changed the /opt/rtcds/userapps/etc/userapps-user-env.sh file to a new copy checked out from the userapps repository.  The new configuration includes paths added to support the userapps repository changes made Nov. 15.  

Changed the /opt/rtcds/userapps/etc/userapps-user-env.sh file to a new copy checked out from the userapps repository.  The new configuration includes paths added to support the userapps repository changes made Nov. 15.  

[Jeff B, Jeff L, Rich A, Koji A]

On Friday, we looked at OMCS for the preparation of the installtion after the TF approval in the late afternoon.

- Dog clamps, 12pt screws, the cookie cutter, and its screws were prepared.

- The genie lift was moved near HAM6

- We looked at the cable routing. The quadrapus cables are too long & we have three unused connectors.
  They will be tacked on the OMCS structure.

- The isolation between the cable shields and the suspension structure was checked. We found that the
  shield of the OMC ISC cables are shorted to the suspension structure. The DCPD preamp housings
  (made of AL) are directly attached on the structure. (The situation is the same for the LLO OMC too.)
  We can't isolate the preamp right now unless we have some special PEEK components
  such as PEEK 1/4-20 screws or PEEK shoulder washers for 1/4-20. We have CLASS A, C&Bed Kapton
  sheets, which may be useful.

  On Monday morning, we continue to work on the cable routing while the remedy for the preamp isolation will also be explored.

With help from CherylV, JoeG, VolkerQ, OlliP, PeterK et al., we completed the installation of the H1 PSL ISS 2nd loop PD array in HAM2 yesterday afternoon.

This array was fabricated and aligned by OlliP, PeterK, RichA, and CalumT at CIT, then shipped to LHO and set up in the H2 laser area enclosure for further testing of sensitivity to pointing fluctuations and final alignment.

An updated method for quantifying the pointing sensitivity and executing the final alignment was developed and is documented in T1300925 which will be posted to the DCC shortly.  Also, the performance of this array is captured in the test report, E1300863, which should also be posted to the DCC shortly.

The installation went relatively smoothly after recovering from compiling issues after the update of the RCG code on Tuesday (thanks to Arnaud and Jeff for help with the suspensions).  The DC voltage levels seem to indicate that the PD positioning was somewhat compromised compared with what was achieved in the H2 Laser Area Enclosure before transporting, installing and connecting cables.  I suspect that the forces involved in connecting the cables and the weight of the cables is responsible for movement of some of the PDs.

All eight array PDs and the QPD checked out electrically and with laser or flashlight light.

The measured DC levels after installation and alignment (viewed from the back - terminal side of PDs) were:
Upper Left:   415 mV
Upper Middle Left: 475 mV
Upper Middle Right: 470 mV
Upper Right: 365 mV
Lower Left: 395 mV
Lower Middle Left: 67 mV
Lower Middle Right: 565 mV
Lower Right: 554 mV

Pre-installation measurements are summarized in the attached plots.

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.