Last week-end, we took a last set of transfer functions to build a nice reference and confirm that the ISI is ready. Note that some resonances (17Hz, 26Hz) observed in corner 2 (horizontals) during the previous measurements disappeared. I have attached a transfer functions comparison that illustrate the problem in stage 2 corner 2. The SUS crew worked intensively on the QUAD to solve rubbing issues, touching flags, miscellaneous adjustments, etc...; it can explained the differences between the two measurements. I superposed 3 horizontal transfer functions in corner 2 :
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2012 02 03 : with FM and QUAD (fiber)
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2012 04 27: with FM and QUAD (metal)
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2012 05 12: with FM and QUAD (metal)
The last set of transfer functions can be found at:
*2012_05_12*
