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Reports until 17:58, Friday 01 May 2026
LHO VE (VE)
gerardo.moreno@LIGO.ORG - posted 17:58, Friday 01 May 2026 - last comment - 15:53, Monday 04 May 2026(90093)
CP1 Soft Regeneration Started

(Jordan V., Travis S., Dave B., Gerardo M.)

The CP1 soft regeneration officially started today at 4:56 pm local time, when we closed the bottom liquid draw valve.  We had a small issue with GV6 not wanting to hard close, we did two tries at hard closing this valve, it did close on the second try with a pressure of 65 psi.  The SS500 has been set to allow to pump despite the increase on pressure due to the lack of LN2 internal to CP1.  We used hoses to get the scroll pump exhaust out of the LVEA.  We will monitor the soft regeneration progress remotely.

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gerardo.moreno@LIGO.ORG - 09:44, Monday 04 May 2026 (90101)VE

Update

Regeneration process continues, no issues to report as of now.  Pressure internal to the cryotrap is now rising, see attached plot.  System was monitored remotely over the weekend.

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gerardo.moreno@LIGO.ORG - 15:53, Monday 04 May 2026 (90106)VE

CP1 exhaust pipes.No ice!

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