Nutsinee, Daniel, Sheila
We have some requests for the operators to try some tests next time the range drops to around 110Mpc. We'd ask you to try each of these tests, which you can do by copying and pasting the lines below into a terminal. Waiting 10-15 minutes between each one would make sure we what happens. If any of these appear to fix the problem (or the range goes back to normal on its own) obviously you can stop the test.
Keita has OK'd staying in observe, so before starting this go into SDF and unmonitor these channels, and remonitor them when you are done. If there is a problem with this and we are out of observing momentarily that's sort of OK, although we would like to avoid it if possible. Also, please alog carefully and include times when you do this. Thank you.
1) increase SHG gain by 20dB
- caput H1:SQZ-SHG_SERVO_IN1GAIN 27
- Wait 5-10 minutes.
- caput H1:SQZ-SHG_SERVO_IN1GAIN 7
2)H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG move up and down by 10 degrees, wait 10-15 minutes between moves.
- caput H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG 120
- wait 5-10 minutes
- caput H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG 100
- wait 5-10 minutes
- caput H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG 110
3)lower CLF ISS gain
- caput H1:SQZ-CLF_ISS_GAIN 10
- wait 5-10 minutes
- caput H1:SQZ-CLF_ISS_GAIN 16
Sheila/Keita: I'm catching up on emails/alogs. Couple questions regarding this:
1) Is there a preference for when we should run these tests with regards to the other detectors? Would we want to do it when L1 is out of Observing? Or does that matter?
2) I tried to get set up to UNMONITOR some channels, but I wasn't quite able to; here are notes on the channels:
H1:SQZ-SHG_SERVO_IN1GAIN: This does not come up when I Sort On Substring for it. So does that mean SDF already does not care about it?
H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG: This channel also does not come up. There is a H1:SQZ-CLF_REFL_RF6_PHASE_D (& _R) which comes up though.
H1:SQZ-CLF_ISS_GAIN: This also does not come up. There are channels for _CTRL_GAIN & _ERR_GAIN though.
Anyway, we have been at 110Mpc for the last 8hrs spanning two different locks. If L1, breaks lock, maybe I'll give it a go, but right now they are up.
H1:SQZ-SHG_SERVO_IN1GAIN, H1:SQZ-CLF_REFL_RF6_PHASE_PHASED, and H1:SQZ-CLF_ISS_GAIN are found under H1SYSECATC1PLC4 (CS_ECAT_PLC4 button on SDF overview screen). I didn't know that that was the case, but was able to find it once I saw that these things are all analog board settings.
Settings for analog boards (common mode boards, delay line phase shifters, whitening amplifiers etc.) are typically controlled using ethercat (there are exceptions e.g. SUS BIO and some of PSL boards) so you'll find those in one of ethercat SDFs.
14:43:10 Tried CLF_ISS_GAIN to 10dB
14:48:10 Back to 16dB
14:53:30 Tried CLF_SERVO_IN2GAIN to -15dB
15:00:00 Back to -9dB
15:27:30 CLF_ISS_SERVO off
15:34:00 CLF_ISS_SERVO on
15:40:16 CLF_ISS SERVO off
15:45:16 CLF_ISS_SERVO on
No change with any of the above attempts.
Nutsinee Daniel
CLF power change
We changed the CLF power from 120µW to 55µW and it correlated with the range!
Times:
We accpeted the new settings in SDF and leave it as the new nominal over the weekend.