The output power of various visible alignment lasers currently in the LVEA was measured.
All are 635 nm (red) diode lasers.


  

    
 Laser 
    
 Output Power [mW] 
    
 Class 
    
 Comments 
  
  

    
 spare OpLev laser 
    
 0.070 
    
 1 
    
 Mounted on a tripod, by the wall north of HAM5 
  
  

    
 baffle alignment laser 
    
 2.75 
    
 3R 
    
 Alignment laser used in the biergarten, based on momentary use 
  
  

    
 TCSX alignment laser 
    
 0.43 
    
 2 
    
 Housed in the TCSX enclosure, generates a cross 
  
  

    
 TCSY alignment laser 
    
 0.28 
    
 1 
    
 Housed in the TCSY enclosure, generates a cross, measured ~100 mm from output aperture,
classification for this particular laser only 
  


All powers were measured with a Thorlabs S140C-SP1 power meter, S/N 12092856 using a PM100A display
S/N P1001329.

This morning I completed the weekly PSL FAMIS tasks.

HPO Pump Diode Current Adjust (FAMIS 8451)

With the ISS OFF, I adjusted the HPO pump diode operating currents.  The changes are summarized in the below table; a screenshot of the PSL Beckhoff main screen is attached for future reference.

I did not adjust the operating temperatures of the diode boxes.  The HPO is now outputting 155.4 W and the ISS is back ON.  This completes FAMIS 8451.

PSL Power Watchdog Reset (FAMIS 4022)

I reset both PSL power watchdogs at 18:35 UTC (10:35 PST).  This completes FAMIS 4022.

Only item to report is the BS SUS which is RED on CDS, but this is a known issue.  It is locked down, but it was damped before yesterday and tripped yesterday (TJ later informed me this is related to new Guardian state for allowing SUS to ride through earthquakes better...it's being worked on by TJ & Sheila).

Dust Monitors fine this morning.

Maintenance has already started with (1) Ken has started work in LVEA for installing electrical outlets for CP1/2, and (2) Christina has started LVEA cleaning.

With a couple small changes on the payload (CC wafer mount, ???) had to remove 150g for best balance.  The ISI remains UNLOCKED.  I have left it DAMPED with the ISI Guardian and the Chamber Manager PAUSED.  It does isolate.  I updated the Z, RX, & RY Targets to 47000, 89000, & -48000nm(rad.)  The Z target will be changed to 27000 once under vacuum.  I have updated the SDF safe and OBSERVE snap files.

EDIT: Many pardons, this was HAM4 not HAM5.

Preliminary TFs have been taken and all DOFs appear to match the references well. 

Results can be found in the usual place: /ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/SRM/SAGM1/Data/ 2017-12-04_2329_H1SUSSRM_M1_WhiteNoise*.xml

HAM 4

• 2 x HWS DCBS mirrors have had First Contact applied
• SR2 has had First Contact applied (optic is now locked)

HAM 5 

• SRM M1, M2, M3 stage OSEMs have been recentered, possible rubbing in Pitch has been relieved, and TFs being taken

BSC 1

• ITMy has First Contact cone installed in preparation for FC spray application

Cheryl, Ed

Ed - IM3 - After re-centering the mounting plates for the leaf springs to better center the wires in their spaces, I was able to recover a good portion of the YAW alignment as it was after I zeroed the sliders. Pitch requires the removal of the baffle which was not done at this time. Images below show values before any work was done and then what I finished the day with. More aggressive physical positioning may be required to recover best alignment.

LVEA is Laser SAFE

BS suspension tripped its watchdog today, but this optic was locked down last Thur by Travis and will stay locked until after the First Contact is removed right before buttoning up.  So this will be red on the CDS Overview.  Similarly, SR2 was locked down recently, but it was still "Damped".  I tripped it for Fil's Sat Amp Ground Check and then re-damped it...this is when Travis told me it was locked.  Anyway, Guardian took it from a Tripped state to a Damped state (eventhough it was locked).

Day's Activities:

• 16:11:  LVEA cleaning (Christina)
• 16:22:  Cleaning Area work (Bartlett)
• 16:28:  EX Slow Control/Beckhoff restart by Patrick (channels green on overview, but NOT updating every few seconds)
• 16:28:  Reset IM1 Watchdog (Ed)
• 17:37: Checking shutter (Mike/Bubba)
• 17:44 tcs wiring (Richard)
• 17:47:  HAM2 IM baffle viton insall (Cheryl, Ed)
• 17:55 TCS AOM Driver pulled out (TJ)
• 17:55 HAM5 Cable Dressing (Hugh)
• 18:03 ITMy wafer holder install (Travis)----
  • (----):  Then off to help with HAM5 work
• 18:05 SRM AOSEM & baffle HAM5 work (Betsy, Travis)
• 18:12 Reset Dust Monitor#3 (Bartlett)
• 18:25:  Work on air line being run out to HAM3/BSCs; putting on fitting today, if possible (Mark/Apollo)
• 18:32 Measure TCSx & y laser powers (Peter King)
• 19:11 Taking Photos (bubba)
• 19:17 OFI HAM5 work (gerardo)
• 21:10 HAM2 IM bias work (Cheryl, Ed)
  • 22:55 Cheryl out
  • 0:13 Ed out
• 21:13 First Contact work:  HAM4, BSC1, BSC2 (Betsy, Travis, Siddesh)
  • BSC3 ISI was tripped & kept it there since First Contact work is still ONGOING
• 21:40 Satellite Amp Ground checks:  HAM3, HAM4 (Fil)
• 22:06-0:00 HAM4 Unlock & Balance ISI (Hugh)
• 22:17 Looking for part in LVEA (TJ)
• 0:09 Going to LVEA (Chandra)

A quick table summary of the alignment of the newly installed baffles that have apertures.

*All other newly installed baffles with any type of adjustment were aligned by sight.

The CO2 Corner Breakout units - D1201062 inside the TCS enclosures were powered up. Breakout units provide power to the aiming lasers needed for alignment. Cabling for the AOM and CO2 laser were not connected. Many of the panel feedthrough jack screws were either tighted or replaced.

Other work done on the table:

FRS 4507
WP7222

The AOM drivers on TCSX and TCSY enclosures were pulled for modifications. AOM monitor board D150404 to be added for remote monitoring.

F. Clara, P. King, T. Shaffer

   DM#30 (BSC3) stopped communicating late Friday afternoon. It was reset this morning. Now all dust monitors are working.

   Posted below are the 7 day trends for the LVEA. There were several high spikes in the HAM5 area. I've requested the cle3aning crew give this area an extra treatment. No other monitors showed items for concern.  

Attached are the VPW desiccant plots with this month's added data.  Since the last data dump back in October of these sensors.  The batteries ended their year+ cycle and quit taking data.  This was discovered a few weeks ago.  Which is why each sensor entry only has a few days of data.  The sensor batteries were replaced and will continue to take data as normal.

Ran the checks for the STS & T240 masses.  STS's were fine.  The T240 had the following masses out of range:

Averaging Mass Centering channels for 10 [sec] ...
2017-12-04 10:39:03.361987

There are 20 T240 proof masses out of range ( > 0.3 [V] )!
ETMX T240 1 DOF X/U = 0.335 [V]
ETMX T240 2 DOF X/U = -0.379 [V]
ETMX T240 2 DOF Y/V = -0.709 [V]
ETMX T240 3 DOF Y/V = 0.337 [V]
ETMY T240 1 DOF Y/V = 0.323 [V]
ETMY T240 3 DOF Z/W = 0.364 [V]
ITMX T240 1 DOF X/U = -0.387 [V]
ITMX T240 2 DOF X/U = -0.32 [V]
ITMX T240 3 DOF X/U = -0.628 [V]
ITMY T240 1 DOF X/U = -0.338 [V]
ITMY T240 1 DOF Z/W = -0.538 [V]
ITMY T240 2 DOF Z/W = -0.609 [V]
ITMY T240 3 DOF X/U = -1.026 [V]
ITMY T240 3 DOF Y/V = -0.341 [V]
ITMY T240 3 DOF Z/W = -0.759 [V]
BS T240 1 DOF Y/V = -0.35 [V]
BS T240 1 DOF Z/W = -0.519 [V]
BS T240 2 DOF Y/V = -0.443 [V]
BS T240 3 DOF X/U = -0.637 [V]
BS T240 3 DOF Z/W = -0.564 [V]

2017-12-04 10:37:23.352027
All STSs proof masses that within healthy range (< 2.0 [V]). Great!

Closing out this FAMIS task.

NOTE:  PMC reflected power is note as being high....this has been noted atleast for the last 1-2 months (I only looked that far back).  So just wanted to make a note of that.  Closing FAMIS task 7467).

Laser Status:
SysStat is good
Front End Power is 35.74W (should be around 30 W)
HPO Output Power is 154.4W
Front End Watch is GREEN
HPO Watch is GREEN

PMC:
It has been locked 0 days, 14 hr 22 minutes (should be days/weeks)
Reflected power = 23.59Watts
Transmitted power = 48.95Watts
PowerSum = 72.55Watts.

FSS:
It has been locked for 0 days 14 hr and 22 min (should be days/weeks)
TPD[V] = 1.62V (min 0.9V)

ISS:
The diffracted power is around 2.6% (should be 3-5%)
Last saturation event was 0 days 14 hours and 21 minutes ago (should be days/weeks)

Possible Issues:
PMC reflected power is high

   Posted are the results for the BRS 7-Week drift trends. The events during the 10-30 to 11-06 week are Krishna rebuilding the BRS-X and some minor work on BRS-Y. The BRS-X event at the end of November was Krishna and Mike doing some centering work.    

Notes from the 9am Monday Meeting

Early Week Stuff:

Laser Safety:

• Albert & Dave:  All Hands Meeting today at noon (tentatively) in Multi-Purpose Room
• Regular Monthly Safety Steering Meeting devoted to laser safety

Acceptable lasers:  Jason's alignment laser (was measured & approved by Peter)

CO2 TCS Lasers:  Couldn't power them on to check them last Fri. (power cables probably disconnected when tables moved.)  Lasers have class-II sticker (which is eye-safe), but Peter wants to measure them.  So not acceptable until tested by Peter King.

HAM5:  Few items left for Betsy, Gerardo, Hugh.  Goal to close this week!

• OFI dog clamp down (Gerardo)
• OFI AOSEMs (Betsy, Gerardo)
• Baffles (Jim)
• ZnSoleniod window/viewport (Gerardo)
• etc.....

HAM2:  IM Baffle Viton Install (Cheryl)

Audit baffle alignment list  & note it.(TJ & Betsy)

First Contact work:  H4, H5, B1

B&K:  H5, H2, B2 (Kissel)

H6 class-a feedthru fix (Hugh)

Contamination Control Note:  vert & horiz wafers needed for HAMs

Satellite Amp Ground checks:  H3, H4, H2, H5, B1, B2, B3

Later in week:

Doors for B1, H4, H5, H6

VAC:  H4 Cleanroom should be moved after doors on, for a NEG pump install

Tues Maintenance:

• TCS AOM Drivers:  modified so can have readback lights in control room (TJ)
• CDS Freeze continues (Hanks)
• Filter swap for air handlers in the corner station (bubba)

Squeezer:  On hold due to laser, maybe have some cables

Rakesh and I cleaned the ~ 30-50 contamination spots on XBM interior wall, a few feet away from cryo baffle, ranging in size from 1 mm diam. to 1" diam. We scraped the surface of these spots with small flat head screw drivers and a tool with a pointed edge, and collected the brown/black flakes, to be analyzed via FTIR. We wiped with IPA wipes and also tried acetone and methanol (wiped away same as IPA). The spots leave a stain on the SS wall. We are not able to remove 100% of this material with our cleaning technique. The beam tube wall is rough, so wiping is limited without creating other issues with wipe shedding. The location of these spots is two tube welds in from cryo baffle.

Travis and I walked down X-beam manifold in chamber to investigate unknown contamination on the interior wall that Betsy had spotted, a few feet away from oplev flange/baffle. We found two dark brown/black spots near the top/roof of tube, each about the size of a quarter. I was able to scrape some off with a little flat head screw driver and then wipe with IPA wipes to improve/reduce the spots (grinding is needed to remove all). Before and after pictures attached. I wiped until there was no evidence of contaminate on wipe. Then we noticed the side wall was splattered with the same material (photo attached). Its first layer comes off by scraping with a tool, but we did not spend time scraping all 50-some spots. We can go back in to scrape these other spots, but I would first like to send sample in for analysis.

Note that we have seen evidence of higher pressures in XBM (compared to YBM) when it's isolated from beam tube. Could be outgassing from this material. Travis and I inspected YBM and did not find this contaminate.