betsy.weaver@LIGO.ORG - posted 09:10, Tuesday 07 April 2015 - last comment - 13:36, Friday 10 April 2015(17635)
SR3 Acceptance TFs
Attached are the Phase 3b damped and undamped TFs of SR3 taken over the last few months.
The damped TFs of M1 are pretty squashed, but this is because there is some pretty heavy damping filtering engaged for commissioning.
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Spectra are attached.
SR3 acceptance should be accepted.
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I've now added comparison plots for SR3 Phase 3b acceptance TFs measurements for each stage have been compared with similar L1 and H1 suspensions, as follows:- - SR3 M1-M1 undamped & damped results (allhltss_2015-04-10_Phase3b_H1HLTSs_M1_D*_ALL_ZOOMED_TFs.pdf) - SR3 M2-M2 undamped & damped results (allhltss_2015-04-10_Phase3b_H1HLTSs_M2_D*_ALL_ZOOMED_TFs.pdf) - SR3 M3-M3 undamped & damped results (allhltss_2015-04-10_Phase3b_H1HLTSs_M3_D*_ALL_ZOOMED_TFs.pdf) Summary: M1-M1, undamped TFs are consistent with model and similar suspensions. Damped TFs demonstrate R, P & Y DOFs for H1 SR3 are the most aggressively damped of all HLTSs. M2-M2, undamped TFs taken are consistent with model and similar suspensions. Damped TFs exhibit some expected deviation between sites. M3-M3, undamped TFs suffering poor coherence below 0.5 Hz, both H1 HLTSs perform consistently. n.b. L1 SR3 can be seen to be weaker due to missing LL magnet (Integration Issue #175). Therefore, these TFs raise no concerns for SR3. All data, scripts and plots have been committed to the sus svn as of this entry.
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