CDS model restart report: Monday 1st January - Tuesday 2nd January 2018

Software commissioning is ramping up, so I'm restarting the regular restart alogs.

model restarts logged for Mon 01/Jan/2018 No restarts reported

model restarts logged for Tue 02/Jan/2018
    2018_01_02 13:31 h1lsc
    2018_01_02 13:31 h1omc
    2018_01_02 13:31 h1sqz

    Model changes to lsc, omc and sqz (no DAQ restart needed). Also restarts of h1ecat[x1,y1] and h1hwsmsr[1] (not shown).

ISI CPS Noise Spectra Check - Weekly

FAMIS6931

For what it is worth while we have work ongoing while we finish up the corner vent and start ET soon, here are the CPS noise spectra.

The scripts reported that the BS and ETMY had some higher noise.

Ops Day Shift Transition

TITLE: 01/03 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    Wind: 5mph Gusts, 4mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.47 μm/s
QUICK SUMMARY: Plans for today include prep for EY vent and CS commissioning health check, SEI HEPI unlocking and EY locking, getting TCS/HWS back online, and CDS still pulling cables.

AWC Viewport Assembly Installation on HAM5

(Chris S, Kyle R, Gerardo M)

The viewport ASSY-D1700340-001 was installed on A2F4 of HAM5 on December 22 of last year, the conflat joint at this door still needs to be leak checked.

A viewport protector D1200873 was installed with a shiny red metal guillotine D1400106.  To finalize the assembly a yellow protector was used.

 

camera on HAM2 West door upper left viewport installed

I've installed a Watec camera/lens combo on the HAM2 West door, which looks at the baffle downstream of IM1, IO straight baffle HA1.  In order to get a view of the baffle, I used one of our camera housings that sits at an angle to the viewport, and is smaller in diameter than the viewport.  The new position of IM1 (it moved in the +X and -Y directions) and the new Viton under the SiC baffle on IM1 combine to reduce the view of the aperture on HA1.  The edge of the aperture that's closest to IM1 is so close the the IM1 SiC baffle that it's not clear to me that all of the front edge of the baffle aperture is in the camera view, however the baffle is thick, and I can identify the back edge of the baffle aperture on that side.  The mounting system inside the camera housing cannot move toward the viewport even if all screws were to loosen, and the camera/lens combo is on a swivel ball head and is mounted so that in every possible position the lens cannot reach the viewport.  The camera view is rotated 90 degrees.  The first attached image is rotated to correct that, and the second image is true to what is seen on the CRT display, with +Z direction being toward the right in the image, and the third image is a full res image of the aperture (large file, also corrected for +Z = up).

CO2X plumbing

Hooked CO₂ table back up to the chiller lines. Had to use new tubing as the old ones wouldn't reach the pipe anymore. Took the opportunity to look at contamination in the laser cooling lines, Pictures attached. The wipes were inserted into the elbows and run around, you can see what looks like corrosion deposits that rubbed off, as well as some plastic or metal chips. I then blew some air through the chiller lines of the laser, which moved through apparently unencumbered so that was a good sign. I'm not sure why that larger contamination wouldn't be caught by the sock filters on the chillers, it may be there isn't enough flow velocity to move them out of the nooks and crannies. If there was this much in the larger lines I can definitely see why the smaller lines like the AOM were having problems with contamination then.

Miscellaneous vacuum recovery

Valved-in HAM1 500 L/s ion pump and pumped in parallel with Turbo for a few hours -> Isolated turbo and eventually shut down turbo after IP demonstrated ability to survive unassisted.  

Energized IP1, IP2 and IP3 while assisted by pump carts -> Isolated and then shut down pump carts after IP's demonstrated ability to survive unassisted.  

Valved-in GV5 AIP pump cart -> annulus volume at high pressure due to YBM vent and known inner O-ring leak -> Energized GV5 AIP controller and will pump volume with IP and pump cart overnight.  

Still need to climb on IMC and OMC tomorrow to disconnect connected pump cart hardware.

hot cathode gauge behavior

Noticed that the two relatively new full-range, hot cathode ion gauges on corner volume exhibit strange behavior at a pressure between 5e-6 and 6e-6 Torr. Last Friday PT-180 suddenly fell in pressure (no one on site making changes to vacuum systems). Today when cycling turbo valves (for leak checking), PT-170 suddenly dropped in pressure. Kyle noted something peculiar with PT-525 at EX on Aug. 31, 2017 after TMDS discharge activity (https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=38471). Will contact Inficon for an explanation.

Leak checked vertex

Helium leak checked the joints listed below via the new Inficon UL1000, backing vertex turbo, while X/Y-BM turbos were valved out. The background started at 6e-9 mbar-L/s and drifted to 1.4e-8 mbar-L/s after valving out other two turbos, likely from cross talk due to relatively high volume pressure. No leaks found above this background.

• three NEG reducer flanges on OMC
• IP4 GV on OMC
• TMDS flanges and GVs on BSC 1,3 doors
• (existing) TCS viewport flanges on BSC 1,3 doors
• (existing) HAM2-E bottom-middle viewport flange
• ESD flangles & feedthroughs on BSC 1,3 chambers
• PT-120 valve & flanges on BSC 2
• YBM turbo isolation GV
• two blanks that replaced i-LIGO RGA port on BSC 7,8
• viewport flange on HAM5-N door

Restarted h1hwsmsr and h1fwsmsr1

Today we restarted h1hwsmsr and h1fwsmsr1 for Thomas Vo in an effort to get them to detect their cameras.

WHAMs 1 2 3 5 & BSC 2 HEPIs Unlocked

WHAM4 was already unlocked so all HAMs are unlocked except HAM6.  Will unlock BSC1 & BSC3 likely tomorrow.  We've relieved the DC position with the big springs so isolated/un-isolated & locked position (during vent) are the same, to a point.   Will tabulate the diffs and report.

Ops Day Shift Summary

Triple Top Coil Driver Repaired & Replaced - SUS-C4 Rack

R. McCarthy, M. Pirello

We replaced the spare (S1001082) Triple Top Coil Driver with the repaired original (S1100195).  The original had a bad relay and was swapped back in December with the spare.  The unit was repaired, tested, and replaced into its original configuration. 

Alog of events leading up to this: 39877

This is PR3's top mass (T3 LF RT SD) coil driver. It actually resolves the issue of PR3 (LHO aLOG 39540, LHO aLOG 39878, FRS Ticket 9497) -- not PR2 (the aLOG linked above).

Beckhoff slow controls IOCs at end stations restarted, fixed EDCU and autoburt problems

Daniel, Dave:

Daniel restarted the EPICS IOCs for h1ecat[x1,y1]. This fixed the DAQ EDCU and the hourly autoburt connection issues.

new models for lsc, omc and sqz

Daniel, Dave:

new models for h1lsc, h1omc and h1sqz were installed. No DAQ restart was needed.

2018_01_02 13:31 h1lsc
2018_01_02 13:31 h1omc
2018_01_02 13:31 h1sqz

0.85Hz Peak on the ETMX-ISI

Over the last week we have noticed an anomalous peak in the amplitude spectrum of various sensors on ETMX-ISI, reminiscent of the 0.6Hz peak on HAM 2(?) back when

Looking more closely it seems to be mostly showing up on  a few of the CPS channels, St1-H1, ST2-H2 and H3, see the attached screen shot. This data is with the loops on