This morning Mark, Tyler, Bubba, and I attached the install arm on to the West side of the North door on HAM5. We couldn't find the tub of bolts dedicated to this assembly, but found some others nearby (which included some of the door bolts, that we will need to remember to put back when we are finished). The arm is currently only held on with 3 of the 4 bolts that were previously used with this arm. HEPI blocked access from the front to the lower right thru hole, and there was not enough clearance in the back. Perhaps this arm hasn't been used wiht the new style HEPI's yet? Bubba doesn't think the missing bolt will cause any problems and a possible fix with a shorter piece of all-thread is in the works.

Picture attached of the arm installed but all covered up. (Forgot to take pictures until we were walking away.)

Cheryl V., Ed M.

This afternoon we installed an access platform into HAM2 on the SW corner of the ISI table for accessing IM3.

Day's Log Of Activities

• 15:57UTC (8:57amPDT) HAM5 Arm prep work (TJ)
• 16:03-17:10 Moving West Crane to BSC2 for fall protection for Vac work at BSC2 chamber (Kyle)
• 16:07 Dust Monitor 30 (BSC3) out, power cylcling (Jeff)
• 16:20 Picking up cleanroom garb (Travis)
• 16:23 HAM6 septum work, installing new viewport (Hugh, Jim, Greg, & Gerardo)
• 16:30 DC Power Distribution (WP#7179) work this morning (Fil, Richard, until "lunch")
• 16:49 Beer Garden Test Mass measurements (Travis & Angus, morning & afternoon)
• 17:01 HAM4-ISI & OM1 (HAM6) both tripped (& were redamped)
• 17:09 Restarting h1susauxh56 model [will require DAQ restart] (Dave & Jeff K)
  • For specifics, please see his alog.
• 17:12 LVEA HVAC work begins
  • Both dampers OFF for ~1st hour
  • Then one damper back ON & monitored (Bubba)
• 17:17 Restarting h1susopo (Dave)
• 17:25 IO Work before & after lunch (Cheryl & Ed)
• 18:14-19:31 MY cleaning (Karen)
• 18:18 Quarterly check of Dust monitors at both end stations (Jeff B)
• 20:22 Survey elevation of SR3 heater + Install 5-Way cross feedthru (Hugh,TJ)
• 20:56 CER work (Richard)
• 21:54 HAM5 (Betsy)
• 22:10 Checking ALS table (Sheila)

Jeff, Sheila, Dave:

to show off my recently acquired skills in drawing ellipses using gimp, the attached plot shows the three main changes made to the LHO SITEMAP as part of SQZ install.

1. PEM has been reduced from two to one button. To permit this, I have replaced the links to building detail screens with a launcher screen.

2. OPS and O1 (sic) screens have been merged to the OPS button

3. new SQZ button added.

  Checked all monitors except PSL (will do on Wed when in for other work), and #2 and #10 in the LVEA. These are in running cleanrooms with vent work underway. Will check these early in the morning before the work day starts. 

   The rest of the monitors are working within specifications.   

Summary:  Looks like some alignment touch up might be needed due to high PMC Refl & a low ISS diffracted power.

Laser Status:
SysStat is good
Front End Power is 35.87W (should be around 30 W)
HPO Output Power is 153.9W
Front End Watch is GREEN
HPO Watch is GREEN

PMC:
It has been locked 1 days, 20 hr 22 minutes (should be days/weeks)
Reflected power = 24.41Watts
Transmitted power = 49.64Watts
PowerSum = 74.05Watts.

FSS:
It has been locked for 0 days 1 hr and 46 min (should be days/weeks)
TPD[V] = 2.007V (min 0.9V)

ISS:
The diffracted power is around 1.8% (should be 3-5%)
Last saturation event was 0 days 1 hours and 54 minutes ago (should be days/weeks)

Possible Issues:
PMC reflected power is high
ISS diffracted power is Low

Apollo is back on site to resume HVAC Control work. This morning shortly before lunch, we took down both of the LVEA air handlers for about 45 minutes. We then restarted AHU-1 only and continue to run on that AHU only. I increased the air flows on both fans and opened the face/by-pass damper slightly. Temperatures in the LVEA are stable and I will continue to monitor. 

J. Kissel, D. Barker

Now that we've moved the suspension point projections into the ISIs (e.g. LHO aLOG 26363), it's much easier to add new interesting suspension point projections to each platform. I've added new projection infrastructure to ISI HAM2, ISI HAM5, and ISI HAM6 to include
- ISI HAM2: Connecting the pre-existing IM1, IM2, IM3, and IM4 projections' longitudinal output via dolphin IPC destined to be picked up by h1oaf.mdl. 
- ISI HAM5: Creating new SUSPOINT projections for the OFI and ZM2 with associated new senders via dolphin IPC to the h1oaf.mdl. The new projections are stored in the frames at 4096 Hz.
- ISI HAM6: Creating new SUSPOINT projections for VOPO and ZM1 with associated new dolphin IPC senders to the h1oaf. The new projections are stored in the frames at 4096 Hz. Also, creating new dolphin IPC sensors for the pre-existing longitudinal output for the OMC, and OM1, OM2, and OM3.
- OAF: In OAF, all corresponding new and newly added longitudinal suspension point projections were added as inputs to the giant cavity basis matrix, with new output elements,
    - "IOL" for "Input Optics Length," imagined* to be the coherent sum of IMs L, to recreate path length displacement between the IMC output and PRM IFO input
    - "ASL" for "Anti-Symmetric Length," imagined* to be the coherent sum of the OFI, the OMs, and the OMC, to re-create path-length displacement between the SRM IFO output and the OMC
    - "SQZL" for "SQueeZe Length," imagined* to be the coherent sum of the VOPO and the ZMs to recreate the squeezer path length displacement between the VOPO and the OFI
*I say "imagined to be" because that's what I naively think should go into the coherent sum to recreate the path length, but the matrix has been setup that it can be the coherent sum of any optic, if we so chose later.

Attached are screenshots of the relevant parts in each model that were affected by this change. 

We'll make the modifications to each HAM ISI's custom SUSPOINT screen in due time. We don't yet have projections for any of these new suspensions (or from the OMs), but I'll eventually work with the systems group to get something good enough.

Finally, of note, I've *removed* the last of the suspension point projection displays from the OM ALL and RM ALL MEDM screens, as has been done some moons ago for all other SUSs.

J Warner, S Dwyer, S Cooper

We've been looking at what we should do during large earthquakes. The attached plots show the state of both the SEI Guardian (State N), and the L2 watchdog (L2 WDMON) channel, the L3 Oplev and the HEPI L4C's (as the ground STS's saturated) for the 8.1 magnitude Mexico earthquake (GPS: 1188881718), alog 38570, for the chambers ITMX,ITMY,ETMX,ETMY. During the earthquake, all the ISI's tripped as well as the ITMX suspension watchdog. From these plots we think that the decrease in amplitude of the Oplev signal is due to the reduction in ground motion around this time, rather than damping of the ISI, as both the damping and the reduction in ground motion occurred at similar times.

WP7162 Sheila, Patrick, Jeff, Dave:

h1susauxh56: latest version of this code was installed.

h1susopo: DACKILL part in OFI was removed.

h1isiham2: new IPC sender channels (qty 4) added.

h1isiham5: new IPC channels (qty 2), DAQ changes, 12 fast channels added to frame.

h1isiham6: new IPC channels (qty 5), DAQ changes, 12 fast channels added to frame.

h1oaf: IPC receivers added.

Sheila and Patrick updated the SQZ beckhoff PLC DAQ ini file. I added it to the DAQ for the first time.

DAQ was restarted to resync with: h1susauxh56, h1susopo, h1isiham[5,6], h1oaf, H1EDCU_ECATC1PLC4

Restarts were unremarkable, partial second trend file was renamed as per normal procedure.

J. Kissel, D. Barker, R. McCarthy

As was done with RMs last week (see LHO aLOG 38883) I've re-populated the EPICs records and foton filters for H1 SUS OM1, OM2, and OM3 after having moved them over from the old h1sushtts.mdl front end model to the h1susomc model. 

Having reminded myself of all that was needed with the RMs (including DAMP and COILOUTF gains), I believe I've covered all bases. 

Several Things of Note:
- I've gone back to the RM_OVERVIEW and HSSS_OVERVIEW screens because the GDS_TP screen was incorrectly still pointing to the H1SUSHTTS GDS TP screen of the OMs. So, I created a new macro variable MASTERMODEL (and lowercase mastermodel) in all of the HSSS macro files (rmall, omall, imall, and each individual file).

- We also have compiled and installed the new h1susauxh56 to pick up all the new SUS' coil driver monitoring.

- I have NOT yet updated / created a new safe.snap for the h1susomc model that includes the OMs.

- I have not bothered to restore alignment offsets. 

In-air cabling and electronics (re)install for OMs is not yet complete -- in addition to the front-end / IO chassis ADC and DAC card shuffle, which is complete -- the OMs' feedthrough exit out of HAM6 are getting re-arranged to make room for all the new SQZ elements in HAM6 and the former in-air cabling is just ~10 ft. too short. As such, we won't get the chance to confirm /test that all the digital infrastructure has been restored properly until that stuff gets finished.

With GregG in chamber and JimW helping outside, the installation of the ViewPort onto the -X most Septum Window was pretty straight forward.  A new o-ring was used and the window/flange clocking mark was put at 9o'clock (-X) and was torqued in three steps to 16 ft-lbs.  Attached photo shows these men in action.

   Added 250ml water to the PSL crystal chiller. Diode chiller water levers were OK. 
   Both filters look good as well. 

A. Bell, J. Oberling, T. Sadecki

ITMx has been successfully hung as a newly welded monolithic.  I'll leave it to Jason to post the actual numbers, but the PUM to TM differential pitch better than the old version of ITMx.  Now to put it back together in chamber next week.

On the 5th I opened the soft covers on HAM6 to lock the ISI and noticed that one of the black glass pieces was broken. I'm posting a couple of pictures here. Betsy, JeffK and others have looked to see if we noticed this during the last HAM6 vent, but none of the pictures in the alog show this glass in any detail.