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Entry  Wed Aug 17 07:35:48 2022, yuta, Bureaucracy, General, My wish list for IFO commissioning 
    Reply  Fri Aug 19 14:46:32 2022, Anchal, Update, SUS, Open loop transfer function measurements for local damping loops of BHD optics 
       Reply  Sat Aug 20 20:26:10 2022, Anchal, Update, SUS, Open loop transfer function measurements for local damping loops of Core optics ALL_CORE_SUS_OLTF_2022-08-20-merged.pdf
          Reply  Mon Aug 22 14:36:49 2022, rana, Update, SUS, Open loop transfer function measurements for local damping loops of Core optics 
Message ID: 17096     Entry time: Sat Aug 20 20:26:10 2022     In reply to: 17092     Reply to this: 17097
Author: Anchal 
Type: Update 
Category: SUS 
Subject: Open loop transfer function measurements for local damping loops of Core optics 

I made measurements of old optics OLTF today. I have reduced the file sizes of the plots and data now. It is interesting that it is allowed to read 9 channels simultaneously from c1mcs or c1sus models, even together. The situation with c1su2 is a bit unclear. I was earlier able to take measurements of 6 channels at once from c1su2 but not I can't read more than 1 channel simultaneously. This suggests that the limit is dictated by how much a single model is loaded, not how much we are reading simultaneously. So if we split c1su2 into two models, we might be able to read more optics simultaneously, saving time and giving us the ability to measure for longer.

Attached are the results for all the core optics. Inferences will be made later in the week.

Note: Some measurements have very low coherence in IN2 channels in most of the damping frequency region, these loops need to be excited harder. (eg PIT, POS, YAW, on ITMs and ETMs).

 

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ALL_CORE_SUS_OLTF_2022-08-20-merged.pdf ALL_CORE_SUS_OLTF_2022-08-20-merged.pdf ALL_CORE_SUS_OLTF_2022-08-20-merged.pdf ALL_CORE_SUS_OLTF_2022-08-20-merged.pdf ALL_CORE_SUS_OLTF_2022-08-20-merged.pdf ALL_CORE_SUS_OLTF_2022-08-20-merged.pdf ALL_CORE_SUS_OLTF_2022-08-20-merged.pdf ALL_CORE_SUS_OLTF_2022-08-20-merged.pdf
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