Reports until 07:40, Tuesday 28 July 2026
LHO General
corey.gray@LIGO.ORG - posted 07:40, Tuesday 28 July 2026 - last comment - 07:49, Tuesday 28 July 2026(91279)
Tues DAY Ops Transition: Maintenance Day

TITLE: 07/28 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 4mph Gusts, 2mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.13 μm/s 
QUICK SUMMARY:

Big item today/next few days is the RCG Upgrade, followed by access system work (taking down lasers), and this morning is cleanroom moving around Biergarten.

Last night, Betsy transitioned the LVEA to Laser Safe (Operations Phase...lasers can be on, VAC/Tables CLOSED).  This Morning for the Access System work, we will be full on Laser Safe (Upgrade Phase...lasers OFF, VAC/Tables CLOSED)

IMC OFFLINE / JAC is DOWN.  Just took SEI_ENV to MAINTENANCE.  Will need to take SUS & SEI to desired states for the RCG work when we get the word.

Comments related to this report
corey.gray@LIGO.ORG - 07:49, Tuesday 28 July 2026 (91281)
Link

WHOOPS!  
Just noticed I forgot to hit "POST" for my Summary yesterday (We were transitioning to Laser Safety at "shift change"...and I was also trying to figure out how we shift change...since this is the first EVE shift I've had a hand-off for for a while! :)
 

TITLE: 07/27 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: Ryan C  Oli
SHIFT SUMMARY:

Today was last full day before the big CDS RCG work starting tomorrow.  With that, JAC crew worked on final checks.  There were checks on subsystem SDFS.  HAM7 SUS work continued.  CDS did prep work for tomorrow.  Toward the end of the shift Betsy worked on transitioning the LVEA to SAFE.  And I'm handing off to Oli.
LOG:

  • 1503 Verbal Alarm:  "check corner station hepi pumps", later notified Jim.
  • 1509-1821 technical cleaning, LVEA (kim.dawn)
  • 1510 Leaving ELEC door open at LSB for Richard+contractor, working on Front Gate 
  • 1512-1522 VAC walkabout (jordan)
  • 1540 Dave phoned in about prep work for the big CDS work tomorrow/Tues
    • Asked that no one made model changes this morning--no mention this morning.
    • Did find a change for the HAM3 ISI---Jeff talked with him about it and this is most likely related to Arnaud's weekend work.
    • Also there's a PEM excitation which is on (messaged Robert)
    • Dave in at 11
  • 1552-1739 Connecting pump outside to LN2 dewar at MY (jordan, WP13448)
  • 1626-1634 checking annulus pumps + overall lay of the land of scissor lifts and other items for GV work (travis)
  • 1645 SUS (ZM5 & ZM2) work at HAM7 (rahul.camilla)
    • 1700-1703 dust alarm @HAM6
    • 1814 rahul out
  • 1706 Testing seismometers at the berm/bridge (carlos, shrey, miranda.robert)
    • 1728-1744 Grabbing shaker from lvea & robert took out to berm (robert.miranda)
  • 1709-1719 lvea walkabout (betsy)
  • 1715-1723 Looking for tool + may take out to HAM7 team (ibrahim)
  • 1723-1736 Scoping out scissor lift plan around GV6 (gerardo)
  • 1725-1803 Technical Cleaning @HAM Shack (kim)
  • 2020 Replacing Annulus Ion Pump at EY (jordan.gerardo.travis)
    • 2023 Gerardo looking for parts in LVEA first.
    • 2317 Travis back & Gerardo/Jordan looking at LN2 dewar pump-down at MY.
  • 2040-2055 PR2 transfer functions (oli)
  • 1944, 2032, 2044 Dust monitor alarms for LAB1 
  • 2048-2218 HAM7 work (Camilla.RyanS)
    • 2058 Running equipment to Camilla @HAM7 (ryanS)
  • 2113-2121 Beer Garden checks (betsy)
  • 2135-2237 HAM7 SUS work (rahul.ryanC)
  • 2130-2200 Tracking down possible cabling issue (jennie.keita)
  • 2313-2319 Turning off CRS laser (shoshonna)
  • 2319 Transitioning LVEA to SAFE (betsy)