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Reports until 07:42, Thursday 30 April 2026
LHO General
ryan.short@LIGO.ORG - posted 07:42, Thursday 30 April 2026 - last comment - 07:50, Thursday 30 April 2026(90066)
Ops Day Shift Start

TITLE: 04/30 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: MAINTENANCE
    Wind: 4mph Gusts, 2mph 3min avg
    Primary useism: 0.07 μm/s
    Secondary useism: 0.14 μm/s 
QUICK SUMMARY: Several projects continue today, including surveying of the BS on the test stand and setting up new electronics for the BBSS.

Yesterday, Betsy had turned the HAM3 QPD chassis back on after having it off for replacement of the chamber feedthru, and comparing at least the NSUMs of ASC POP A and B to before the chassis was turned off, the levels are a little lower and a bit noisier (see attached).

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david.barker@LIGO.ORG - 07:50, Thursday 30 April 2026 (90067)

State of CDS

We are currently running with some RED on the Overview, these are:

1. h1suslo12 (BBSS) has its DACKILL part triggered

2. Removed h1susbs IPC senders are causing some IPC receive errors

3. BSC2 SWWD has SEI tripped

4. Pending SPI filter load

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