Camilla, TJ, Dave:
Last Thursday 26th June 2025 alog85373 I restarted the HWS camera control code. We hoped this would improve the 2Hz noise comb in DARM. Initial results for F-Scan (observing) suggest it has not made much, if any difference.
Attached F-Scans show the spectra on sun22jun2025 and mon30jun2025. The 2Hz comb (blue squares) look unchanged.
More investigation is needed to verfiy we are indeed disabling the frame aquisition on all HWS cameras when H1 is in observation.
Looking at the HWS camera data, Dave's code was successfully stopping the HWS camera dueing NLN from 27th June, as expected 85373.
However, looking at the f-scans from the last week, the 2Hz comb was there until 3rd July but was gone on 4th July and hasn't returned since.
Nothing HWS related should have changed on the 3rd July (ops shift log 85519).
Excellent, thank you Camilla and Dave! This is very helpful.