Reports until 11:45, Thursday 27 April 2023
H1 PEM
ryan.short@LIGO.ORG - posted 11:45, Thursday 27 April 2023 - last comment - 13:30, Monday 01 May 2023(69091)
CS Magnetic Injection Run this morning

To get a calibration factor for Anamaria in order to run coincident magnetic injections at both sites in the future, I drove the CS vertex coil with a gain of 600,000 between 18:28 and 18:33 UTC. Response in DARM and my injection settings are attached.

Images attached to this report
Comments related to this report
ryan.short@LIGO.ORG - 16:54, Thursday 27 April 2023 (69119)

Looking back on this injection duration, I was unintentionally saturating the vertex magnetometers (oops). Since we want these to remain functional, I reran the injection with a (much) lower gain of 65,000 and saw a lower response in DARM, but enough for this to work for an initial calibration.

Images attached to this comment
adrian.helmling-cornell@LIGO.ORG - 13:30, Monday 01 May 2023 (69215)PEM

Coupling function html report for this time can be found here: https://ldas-jobs.ligo.caltech.edu/~adrian.helmling-cornell/mag_inj_test/injection_1366848018_1366671318/

I think there was an IFO configuration change which is why DARM differs at 300 and 800 Hz. Because the floor sensor is out, it's hard to see the 10-40 Hz broadband injection in other EX sensors (attached example), but maybe it's visible in DARM. Fil and I will swap the EX floor box tomorrow - hopefully it starts working then.

Images attached to this comment