hugh.radkins@LIGO.ORG - posted 11:38, Wednesday 19 November 2014 - last comment - 13:09, Wednesday 19 November 2014(15169)
WBSC1 ITMY HEPI Performance after matrices/controller changes
re 15131, attached are pdfs of spectra for the ITMY HEPI L4Cs around 1am Tuesday and Wednesday before and after I made these changes Tuesday morning. The first two pages are the individual runs and the third crowds things up and puts them on the same plot to maybe improve the comparison.
Bottom line--some places better some not as good even considering the differing ground motion. I think these controller could be more aggressive if we want.
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Comments related to this report
apologies for not being more clear o which is which. The earlier time, gps 11003xxxxxx is before 11004xxxxxx is after. On the busy third plot, the first ground and first L4C races are the early time (before) and the second ground and L4C traces are at the later time, after the change.