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AdV-SGD (FDS commissioning)
sorrentino - 19:44 Friday 31 December 2021 (54371) Print this report
IR BPC disabled

At 18:41 UTC I stopped the IR BPC for the remaining part of the long measurement with AOM loop on, in order to understand if the long term fluctuations of the AOM correction may be related to the angular control.

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sorrentino - 0:42 Tuesday 04 January 2022 (54381) Print this report

With the IR BPC disabled, the AOM correction drifted by about 4 Hz over 30 hours. When the IR BPC was enabled, the AOM correction drifted by about 350 Hz over 70 hours. The AOM correction seems correlated with the IR BPC correction signals.

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sorrentino - 11:21 Thursday 13 January 2022 (54471) Print this report

There was a typo: with the IR BPC disabled, the AOM correction drifted by about 40 Hz over 30 hours (not 4 Hz).

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