ibrahim.abouelfettouh@LIGO.ORG - posted 08:53, Friday 10 July 2026 - last comment - 12:27, Friday 10 July 2026(90984)
HEPI Corner Station Pressure Dipped, Spiked and Recovered
Ibrahim
Got a message at 14:58 UTC to "Check HEPI pump station pressures".
At 14:58,
- the pressure in HEPI Corner Station PS4_PRESS1 (brown) dipped by -5PSI and then spiked by +0.3PSI before recovering. Stable now.
- the pressure in all other HEPI Corner Stations dropped by -0.3PSI from nominal and then spiked to +0.1PSI before recovering. It's stable now. Plots are below.
I checked the End Stations too but nothing was seen (also attached).
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Per Jim's request, here are HEPI Pump Controllers at the time of the pressure dip/kick.
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