Reports until 11:43, Friday 22 September 2023
H1 CDS
david.barker@LIGO.ORG - posted 11:43, Friday 22 September 2023 (73055)
h1susauxh2 DAQ CRC error linked to first power glitch 03:41:57 PDT

Around the time of the first power glitch this morning both models on h1susauxh2 recorded a single DAQ CRC error by both DC0 and DC1.

Attached plots show the 3 mains phases for this glitch, and the second plot shows one phase and one of the CRC errors (they all happened concurrently).

This glitch was more severe than usual, with two phases being significantly reduced in voltage for several cycles.

I will clear the CRCs next time H1 is out-of-observe.

Images attached to this report