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Entry  Tue Dec 8 23:13:32 2009, kiwamu, Update, SUS, free swinging spectra of ETMY and ITMX SUS-ETMY.pngSUS-ITMX.png
    Reply  Wed Dec 9 00:23:28 2009, Koji, Update, SUS, free swinging spectra of ETMY and ITMX 
       Reply  Wed Dec 9 21:09:28 2009, kiwamu, Update, SUS, Re: free swinging spectra of ETMY and ITMX Pitch-Yaw_modes.png
          Reply  Thu Dec 10 00:46:15 2009, Koji, Update, SUS, Re: free swinging spectra of ETMY and ITMX 
Message ID: 2368     Entry time: Tue Dec 8 23:13:32 2009     Reply to this: 2369
Author: kiwamu 
Type: Update 
Category: SUS 
Subject: free swinging spectra of ETMY and ITMX 

The free swinging spectra of ETMY and ITMX were taken after today's wiping, in order to check the test masses.

These data were taken under the atmospheric pressure condition, as well as the spectra of ETMX taken yesterday.

Compared with the past (see Yoichi's  good summary in Aug.7 2008), there are no significant difference.

There are nothing wrong with the ETMY and ITMX successfully.

 --

By the way I found a trend, which can be seen in all of the data taken today and yesterday.

The resonances of pitch and yaw around 0.5Hz look like being damped, because their height from the floor become lower than the past.

I don't know what goes on, but it is interesting because you can see the trend in all of the data.

 

 

 

 

 

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