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Reports until 14:29, Wednesday 11 February 2015
H1 SUS (ISC)
kiwamu.izumi@LIGO.ORG - posted 14:29, Wednesday 11 February 2015 - last comment - 19:04, Wednesday 11 February 2015(16655)
QUAD suspension models updated, DARM -> M0 damping paths added

In response to yesterday's locking activity (alog 16628), I newly added the DARM->M0 damping path in the QUAD suspension models under WP 5047. This allows us for damping the bounce mode through the M0 stage using DARM signals as was done in LLO (LLO alog 16686).

 

(h1susi(e)tmex(y) models are modified)

Right now the modifications are completely local in the sense that I did not change the common QUAD master block but the local front end models, namely h1susetmx, h1susetmy, h1susitmx and h1susitmy. In these front end models, I disabled the link of the QUAD master block in the top layer so that they are now detached from the common QUAD master. I then added the DARM damping filters by coping the filters from Livingston's. I copied them from l1susetmx.mdl. Note that the latest-latest l1 quad suspensions are capable of routing the WFSs signals in addition to the DARM damping, but we don't have this at the moment.

I checked in all the four quad models into svn.

(some screens)

I then updated the medm screen, common/medm/quad/SUS_CUST_QUAD_OVERVIEW.adl (see the attached) which is a variant of what LLO currently has. I have not checked this screen into svn. Jeff will take care of it. Also I added a new screen, SUS_CUST_QUAD_M0_DAMP.adl which displays the filters. This is a duplication of what LLO locally has. Neither of the sites checked this screen in yet.

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Comments related to this report
keita.kawabe@LIGO.ORG - 15:08, Wednesday 11 February 2015 (16658)

EY bounce filters are copied from LLO.

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