Reports until 15:00, Tuesday 02 December 2014
H1 SEI
jim.warner@LIGO.ORG - posted 15:00, Tuesday 02 December 2014 - last comment - 15:38, Tuesday 02 December 2014(15384)
Input matrices updated on ETMY & BS ISI's

I updated the input matrices for ETMY and the BS ISI's this morning. This required redoing the isolation loops for both chambers, so I worked through those as well and re-installed all the filters. Afterwards, both chambers came right back up. Tomorrow, I'll try to do some performance comparisons for tonight and last night. In general, the loops are 30-35hz UGF's, and not particularly aggressive.

Comments related to this report
hugh.radkins@LIGO.ORG - 15:38, Tuesday 02 December 2014 (15388)

With Jims update of the ISIs here, this puts all SEI Local to Cartesian and back conversion matrices in the correct configuration.

Attached is the output from Hugo's check script (to back me up)--all values are correct.  It reports a problem with the BSC ISI HEPI L4C2CART matrix (not the St1 L4C2CART.)  I've checked these and set them manually.  I think the problem is likely that the scipt is comparing the 8x8 HEPI L4C matrix with the 6x8 ISI HEPI L4C matrix.  The ISI matrix doesn't have the pringle modes whereas the HEPI matrix does.  This is a slightly informed guess and maybe Hugo will notice and look closer still.

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