aLIGO LHO Logbook

H1 CAL (CAL, DetChar)

jeffrey.kissel@LIGO.ORG - posted 14:28, Monday 02 December 2019 - last comment - 15:30, Tuesday 25 February 2020(53624)

O3B Summary of High-Frequency Roaming Calibration Line Start Times

J. Kissel,

As we've done in O3A (see LHO aLOG 51245), I hold this space for documenting start times of high-frequency roaming calibration line sweeps to be used for estimating the sensing function uncertainty above 1 kHz.

(All times UTC)
2019-11-01 16:55:02 HIGH_FREQ_LINES guardian reinitialized for the Start of O3B, starting at 4001.3
2019-11-12 18:35:25 data not found on ndscope while only shortly at last data point, 1001.3,  [CAL EX / EY front-end models restarted, and filter coefficients updated; see LHO aLOG 53188 LHO aLOG 53210]
resumes at
2019-11-12 18:38:37 re-started at 4001.3 Hz
2019-11-21 00:49:47 re-started at 4001.3 Hz
2019-11-29 14:40:20 re-started at 4001.3 Hz (and not yet finished)

Comments related to this report

sudarshan.karki@LIGO.ORG - 13:53, Wednesday 18 December 2019 (53974)CAL

Link

Start Date Starttime Endtime 2019-11-01 1256662520 1257619135 2019-11-12 1257619135 1258332605 2019-11-21 1258332605 1259072078 2019-11-29 1259072078 1260382861 2019-12-14 1260382861 (not yet finished)

sudarshan.karki@LIGO.ORG - 16:09, Monday 06 January 2020 (54317)

Link

Start Date Starttime Endtime 2019-11-01 1256662520 1257619135

2019-11-12 1257619135 1258332605

2019-11-21 1258332605 1259072078

2019-11-29 1259072078 1260382861

2019-12-14 1260382861 1261341875

2019-12-25 1261341875 1262275805

2020-01-05 1262275805 (not yet finished)

sudarshan.karki@LIGO.ORG - 11:03, Monday 10 February 2020 (55008)CAL

Link

Start Date Starttime Endtime 2019-11-01 1256662520 1257619135

2019-11-12 1257619135 1258332605

2019-11-21 1258332605 1259072078

2019-11-29 1259072078 1260382861

2019-12-14 1260382861 1261341875

2019-12-25 1261341875 1262275805

2020-01-05 1262275805 1263263360

2020-01-17 1263263360 1264044992

2020-01-26 1264044992 1265150433

2020-02-07 1265150433 (not yet finished)

jeffrey.kissel@LIGO.ORG - 15:30, Tuesday 25 February 2020 (55298)

Link

Start Date       Starttime        Endtime
2020-02-07       1265150433       1265939082

2020-02-17       1265939082       lost because PCALX interlock was inadvertently tripped during the majority of this sweep.

I *should* have restarted the sweep upon the fix of the problem today, but was distracted by trying to install a frequency comb and forgot to trend this before we hit OBSERVATION_READY. Had I, I probably would have re-initialized the HIG_FREQ_LINES guardian to restart a new sweep. Ah well. The first OBSERVATION_READY segment that PCALX returns to functionality is at 1266706798 (2020-02-25 22:59:40 UTC), with a frequency of 1001.3 Hz.
The guardian should take care of "restarting the sweep" at 4001.3 Hz on the next nominal low noise stretch.

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