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Reports until 09:50, Monday 02 September 2019
H1 ISC
sheila.dwyer@LIGO.ORG - posted 09:50, Monday 02 September 2019 (51677)
more offloading needed for SRC ASC

Looking at Niko's earlier lockloss from increase power, ( 1251472952 )and the most recent (sucsesful) power increase, it looks like in both cases the SRC1+SRC2 ASC loops aren't really keeping their error signals zero'd.  It also seems as though we might need to speed up the top mass offloading for SRM and SR2 (see attachment). 

I looked at increasing the offloading for this most recent lock, but the integrators are in the first filer module for SRM, I copied the top mass integrators for both SR2 + SRM to FM5.  I made the changes to use these later filters in the ALIGN_IFO guardian and laoded these changes.  I haven't finished by also changing ISC_LOCK because Niko made it to low noise and we are now observing. I've made but not loaded the changes in ISC_DRMI, and it looks like there are no changes needed in ISC_LOCK to move these filters (it just uses the settings set in ISC_DRMI).  The next time we are relocking we can load ISC_DRMI to move the integrators, so that we can try increasing the offloading gain. 

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