Displaying report 1-1 of 1.
Reports until 15:44, Friday 20 December 2013
H1 SUS (IOO, ISC)
jeffrey.kissel@LIGO.ORG - posted 15:44, Friday 20 December 2013 (9048)
H1 SUS RMs -- Still Different from LLO, RM2 Still have Anomolous Yaw Resonance
J. Kissel

Ran transfer functions of H1 SUS RM1 and H1 SUS RM2 after Jamie, Alexa, and Kiwamu adjusted the eddy current damping (see LHO aLOG 9034). Results look virtually the same as before (see LHO aLOG 8725); the transfer H1 transfer functions still look different from LLO's RMs, and there's still an anomalous feature in the Yaw to Yaw TFs for H1 SUS RM2. 

Things that *have* changed: 
- H1 SUS RM2 anomolous resonance has *moved* a little
- The high-frequency magnitude for the L2L and P2P transfer functions of H1 SUS RM1 has increased by a factor of ~10 (!!)
- The frequency at which the high-frequency magnitude turns from f^{-2} to f^{-1} has changed for all DOFs in both SUS.

Please note that I'm still using an out-dated, incorrect model for the HTTS that do not include any eddy current damping or local damping. The measurements were taken with the local damping turned off. Mark is close, but not finished with the Matlab model modifications to address eddy current damping appropriately. Next time.

I attach three different comparison plots, all with the same data sets, just different traces compared on different plots so you can see them all and compare them in different ways. 
- allhttss_2013-12-20_Phase3a_H1SUSRM1 ... has the L1 RMs and H1 SUS RM1 measurements before and after the latest adjustment
- allhttss_2013-12-20_Phase3a_H1SUSRM2 ... has the L1 RMs and H1 SUS RM2 measurements before and after the latest adjustment
- allhttss_2013-12-20_Phase3a_H1SUSRMs ... compares the latest measurements (after the adjustments) against each other, and the L1 RMs.

Non-image files attached to this report
Displaying report 1-1 of 1.