jeffrey.bartlett@LIGO.ORG - posted 08:51, Friday 17 May 2013 - last comment - 09:34, Friday 17 May 2013(6406)
I1-SR2 Phase 1b Test Results
Andres took Transfer Function and Power Spectra data on I1-SR2. The results look positive and the plots are posted below. All scripts and data files have been committed to the SVN vault. We are waiting for the testing group to review the results before proceeding.
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After looking through the undamped and damped transfer functions provided for SR2, these TFs raise absolutely no concerns, since all measurements are in good agreement with the model and are consistent with other HSTS suspensions. Power spectra plots now include the expected sensor noise (black dashed line), which shows the measurement agrees with the prediction in the majority of cases. Where there's a discrepancy between the expected sensor noise and the measurement (e.g. M2_WIT_P_DQ and M2_WIT_L_DQ) SR2 measurements are consistent with previous HSTSs, implying the issue is most likely with the calculated sensor noise. Thus, I will investigate this sensor noise calculation further... In the interim, please consider SR2 approved for India. Nice work!