elenna.capote@LIGO.ORG - posted 13:18, Monday 23 June 2025 - last comment - 16:29, Thursday 26 June 2025(85250)
Noise Budget injection inventory
I have been running opportunistic noise budget injections:
Pitch and yaw jitter injections on June 5
MICH P and Y, DC6 P on June 18
Frequency noise, CHARD P and Y, DHARD P and Y, PRC2 P and Y, and intensity noise on June 23
So far there seems to be no noise contribution from DC6 P and PRC2 P and Y. CHARD noise contributions are also down significantly with the ISI in place.
Comments related to this report
elenna.capote@LIGO.ORG - 16:48, Wednesday 25 June 2025 (85347)
I ran SRCL and MICH injections today as a part of determining if the feedforward is performing well, but I repurposed those injection times in the noise budget templates so now SRCL and MICH are complete as well.
elenna.capote@LIGO.ORG - 16:29, Thursday 26 June 2025 (85372)
After running some PRCL injections to test the feedforward I was also able to update the PRCL noise budget template.
I also reran the jitter noise coupling measurement, since it seemed like the coupling was overestimated at low frequency. The jitter noise had been run very early on in vent recovery, so I am not sure what changed to affect the low frequency coupling (could be the pumps, LSC feedforward, ASC, etc) but now the low frequency coupling is very reduced.
I ran SRCL and MICH injections today as a part of determining if the feedforward is performing well, but I repurposed those injection times in the noise budget templates so now SRCL and MICH are complete as well.
After running some PRCL injections to test the feedforward I was also able to update the PRCL noise budget template.
I also reran the jitter noise coupling measurement, since it seemed like the coupling was overestimated at low frequency. The jitter noise had been run very early on in vent recovery, so I am not sure what changed to affect the low frequency coupling (could be the pumps, LSC feedforward, ASC, etc) but now the low frequency coupling is very reduced.