IP-L/T loop check for ITMY suspension - Githubissues

YoshinoriFujii / Weekly-task

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IP-L/T loop check for ITMY suspension #25

Open YoshinoriFujii opened 5 years ago

YoshinoriFujii commented 5 years ago

Background

Based on the TMoplev spectra, the suspension motion at 200mHz looks large compared to the others.
What is the horn at ~180mHz?

Todo
[x] check the current spectra
[ ] modify the IP oops if necessary

YoshinoriFujii commented 5 years ago

starting point:
- ITMY_IPdcdamp_IPsc_BFdamp_BFsc_1631JST

starting point:
1st trial:

with gain 2
w/ gain 1
w/ gain 0.5

w/ gain 0.5, after changing the gain for BFdamp-L/T
- Anyhow this is the currently implemented one.
Does the sensor correction at IP-, BF-stage work properly? It looks that the subtraction is not enough.
- [ ] check/ compare the spectra w/ and w/o SC again.

YoshinoriFujii commented 5 years ago

Then, now ITMY_IPL_after_modification_20190922

-Next:

[ ] investigate/modify the IP-T loop in necessary

YoshinoriFujii commented 5 years ago

FYI, the IPTsc performance at low frequency: