While teams worked on projects in HAM2, 3, and 5, we started working towards ITMx lower QUAD extraction this morning.  Mark D, TJ, Travis and I spent 2/3 of the work day installing the BSC install arm on the west side of the door on the BSC3.  We then loaded it up with the 5-axis stage and the elevator.  All went well.

Travis and I then went in to start the disassembly of the ITMx suspension, removing top stage BOSEMs, plates, and cams, then lifting and lowering stages in order to make slack on the UIM-Top Mass wire segments.  We added shields everywhere.  Tomorrow Travis will work on decabling the reaction chain lower masses and detaching the wire segments.  I'll redirect effort to the SRM optic swap for the day.

Shot elevations with the Optical Auto-Level on the HAM3 Optical Table--Will report separately.

HAM5--All Damping installed except the Horz GS13 Can damper on Corner3 East Side tucked into the space with the HAM6 Septum.  B&K hammering was completed and TMDs await retuning.  The Blade access walls have NOT been replaced.  Once TMDs are ready, will need about 2 hours to get all back buttoned up.

MISC--Packed a couple CC wafers away.  Pulled ISI Oplev Mirror, undogged SR3 front baffle-it is still on the table.

LHO TCS maintenance tasks per T1700136:

1. Synchronize Guardian between sites [AH]:
2. Automated heating beam profiling [AH]:
3. Investigate glitching H1CO2Y flow meter [AB/AH]:
4. Install flipper mirrors and annular heating beam masks [AB/AH]:
5. Make CO2 power cable feedthrough more rigid 
6. Install summing chassis
7. Update operating system to Debian for HWS. Start with ETM HWS
8. Add HWS image viewer (see aLOG 38774)
9. Clean up TCS MEDM screens (see aLOG 38774)
10. Modify RH drivers to work as three wire RTDs (ITMX, ITMY, ETMY). (see aLOG 38785)
11. Transfer spare CO2 RTDs to laser surface. Account for all RTDs on table
12. Adjust flow rate sensor to have same settings at LLO - averaging set to 5s (CO2X see aLOG 38793)
13. Add temperature estimate to ring heater coil.

I set up the averaging on the internal menu of the CO2X flow meter to 5s per LLO aLOG 35984. The CO2Y flow meter is inaccessible right now with BSC3 being open.

The effect can be seen in the attached image.

   Posted are the particle count reading for HAM2 East, HAM2 West, HAM3 East, and BSC1 door removal. The particle counts for these chambers were very good. 

   No data is available for the remaining chamber doors removed, as counts were not taken by the door removal crew.   

I went and checked the cables from the ring heaters where they are attached to the RH drivers in the CER. I wanted to confirm what pins are connected correctly to the RH RTDs (out of the 4 wires that go to the RTD) - see D1200505. The following tables summarize the measurements.

Conclusions: ITMX & ETMY RH RTDs are not salvageable. 

ITMX

ITMY

ETMY

Laser Status:
SysStat is good
Front End Power is 35.95W (should be around 30 W)
HPO Output Power is 153.1W
Front End Watch is GREEN
HPO Watch is GREEN

PMC:
It has been locked 0 days, 11 hr 8 minutes (should be days/weeks)
Reflected power = 20.4Watts
Transmitted power = 49.1Watts
PowerSum = 69.5Watts.

FSS:
It has been locked for 0 days 11 hr and 7 min (should be days/weeks)
TPD[V] = 3.184V (min 0.9V)

ISS:
The diffracted power is around 3.6% (should be 3-5%)
Last saturation event was 5 days 1 hours and 55 minutes ago (should be days/weeks)

Possible Issues:
PMC reflected power is high

Given all the hands that have been on the system, I would say that things look relatively ok and if they aren't, whomever is currently doing work is aware of any deficincies.

Since the HPO is still running, regular HPO maintenance must still be performed regardless of the ongoing vent.  Therefore, today I completed the weekly PSL FAMIS tasks.

HPO Pump Diode Current Adjust (FAMIS 8441)

After 3 weeks of no adjustment due to the NPRO swap in the 35W FE, I adjusted the operating current and temperature of the HPO diode boxes; the changes are summarized in the below tables.  All work was done with the ISS OFF; a screenshot of the PSL Beckhoff main screen is attached for future reference.

The ISS is back ON and the HPO is outputting 153.0 W.  This completes FAMIS 8441.

PSL Power Watchdog Reset (FAMIS 3669)

I reset both PSL power watchdogs at 16:55 UTC (9:55 PDT).  This completes FAMIS 3669.

Corey & Jeff B.,

  Ran the check_dust_monitors_are_working script,and found DM #5 had lost network connection. Corey went to HAM5 and power recycled the unit. All monitors are now working. 

   The 24 hour trend data look good. Only HAM3 reported counts over 100 in both 0.3um and 0.5um. These were of short duration and counts dropped to base line after a few minutes.   

Attached is the diagnostic breadboard relative power noise measurement of the front end.  Generally
speaking the relative power noise is higher, across the board, than the reference trace by a factor
of ~1.5 to ~2.

    Tried to perform a frequency noise measurement but could not lock the diagnostic breadboard's
pre-modecleaner.  Not sure why at this stage as there appears to be plenty of light on the transmitted
light photodiode.

- This morning, Bubba and a small crew removed the HAM5 N and S doors.  Chamber initial entry contam control will happen tomorrow by someone I find.

- Violin mode measurements finished this morning on the ITMx (Kissel, Travis).

- HAM3 damper work continued in the lab, an hour of work remains for first thing tomorrow morning (Kissel, Hugh).

- IO work started in HAM2 (Cheryl, Keita).

- BSC and HAM install arm Hazard analysis walk thru happened with TJ, Travis, Mark D, Gerardo, and I.  We are planning to put the BSC install arm on the W door of BSC3 tomorrow morning.

- Alastair built the laser safe barracade around the TCSY table in prep for having a local laser hazard zone around the table for the week while he is here (there is an SOP for this, will link later, maybe).

- TJ shipped 5 boxes of HAM3/4 baffle parts to the coating company, due back next week for C&B.

- OFI parts coming out of oven "any minute" now for OFI rebuild continuation later this week. (Chamberside testing still scheduled for ~Wed-Fri of next week.)

I noticed that this was off (why?) maybe since the power failure a week or two ago?  -> I energized the controller and pump seems fine. -  OK

(Fil, Marc, Daniel)

We rearranged the ISC-CER racks to comply with the most recent drawing version. This includes the reshuffling of the tip-tilt drivers into the sus racks as well as adding the RF generation for the squeezer. We are still missing a 384-chn BIO and an RF amp concentrator. Most of the cabling for the new chassis is still missing as well.

I've updated the local copy of the TCS folder in USERAPPS.

• This propagated all the changes that we made to the MEDM screens last week at LLO (LLO aLOG 35970).
• Additionally, this downloaded the new HWS stream_image display code that Jon set up at LLO (LLO aLOG 35991)

The HWS data disk was full. After checking that the data was backed up on LDAS, I removed the contents of the /data/H1/ETMY_HWS/1188900000/ directory/

Updated the stream_image aliases on H1HWSEY, H1HWSEX, H1HWSMSR, H1HWSMSR1.

alias stream_image_EY='python /opt/rtcds/userapps/release/tcs/common/hws_code/utilities/stream_HWS_intensity.py 0'

alias stream_image_EX='python /opt/rtcds/userapps/release/tcs/common/hws_code/utilities/stream_HWS_intensity.py 0'

alias stream_image_ITMX='python /opt/rtcds/userapps/release/tcs/common/hws_code/utilities/stream_HWS_intensity.py 1'

alias stream_image_ITMY='python /opt/rtcds/userapps/release/tcs/common/hws_code/utilities/stream_HWS_intensity.py 0'

The stream_image code works for ETMX and ETMY but not for the ITMs. HWS cameras are not connected at the ITMs so we'll have to wait to check those.

3 irises (one each for MC1 and MC3 inside the IMC and  one between MC3 and IM1) were installed.

We'll continue working tomorrow.

Starting 29 August, using an optical auto-level, I collected vertical position data at HAM3, HAM2 and the PSL area floor--see 38584.  On September 20 (post vent,) the HAM3 HEPI Pier Elevations were re-observed.  Bottom line:  No news, the floor did not tilt in any observable way: the four hepi piers moved up from 0.0 to 0.2mm.  While you could argue that this is about 100urads (depending on piers) it is also in the resolution of my measurements.  I closed the survey loop with just 0.1mm error but each observation is maybe +-0.1 or maybe even 0.2mm.  Again, bottom line, no big shift of the floor.

On 19 Sept, the HAM2 ISI Optical table (Stopped on Lockers) was observed with the auto-level.  The ISI table shows a tilt down from SW to NE of about 0.6mm or about 300urad over the ~2m table.  Looking at the CPS positions from before vent to now suggests the ISI has been operating at this attitude for quite awhile as there is only about 30-50urads of tilt from under-vacuum ISI isolated to vented ISI locked.

Attached are my surveying notes.

J. Kissel

H1 ISI HAM3's tuned mass dampers have been retuned to match the first bending mode of HAM ISI blade springs post spring-tip-damper install (~139 Hz). Attached are the results for all three TMDs (pg. 1: before and after tuning; pg. 2: after tuning, compared against the blades).

The retuned TMDs will be installed tomorrow morning.

Details of the measurement setup are as described in LHO aLOG 38741.