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Entry  Tue Nov 30 21:48:13 2010, tara, DailyProgress, RefCav, Cavities egienmode cavity_mode.png
    Reply  Tue Nov 30 22:41:31 2010, rana, DailyProgress, RefCav, Cavities egienmode 
Message ID: 413     Entry time: Tue Nov 30 22:41:31 2010     In reply to: 412
Author: rana 
Type: DailyProgress 
Category: RefCav 
Subject: Cavities egienmode 

The FEA page indicates that the first longitudinal mode is at 13.9 kHz. I suggest to zoom in on that one once you get the frequency noise signals going to the DAQ.

The apparent width that you now see is probably just the FFT window. But, we can use the peak's RMS as a cross check on the calibration since we know that it has k*T/2 of vibrational energy.

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