Reports until 10:57, Wednesday 01 April 2026
H1 IOO
sheila.dwyer@LIGO.ORG - posted 10:57, Wednesday 01 April 2026 - last comment - 12:27, Wednesday 01 April 2026(89733)
Two PRX alignments

For the HAM1 work today, here are two screenshots showing PRX alignments with two different PR3 values.  

PR3 yaw slider at -233.7 urad is here, since HAM2 HEPI is locked 3.7 urad positive RY compared to it's usual location (89701), this corresponds to -230 urad our yaw alignment from O4 (and from the March 14th PRMI/DRMI locking).  

PR3 yaw slider at -240, here, is the alignment for which in the in chamber crew found the beam on the edge of the ASC POP X diode.  

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sheila.dwyer@LIGO.ORG - 12:27, Wednesday 01 April 2026 (89738)

Redoing these screenshots after Jenne Driggers ran the baffle PD script to point ITMX down the X arm.  

O4 PR3 pointing here

yesterday's PR3 pointing that put beam close to POP X here

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