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 Tue Jun 29 14:27:10 2010, Jenna, Laser, GYRO, Comparison of frequency noise and mechanical noise for the gyro cavity 
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 Tue Jun 29 15:41:01 2010, Alastair, Laser, GYRO, Comparison of frequency noise and mechanical noise for the gyro cavity
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Tue Jun 29 17:48:31 2010, Zach, Laser, GYRO, Comparison of frequency noise and mechanical noise for the gyro cavity
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Wed Jun 30 00:35:28 2010, rana, Laser, GYRO, Comparison of frequency noise and mechanical noise for the gyro cavity
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Message ID: 842
Entry time: Tue Jun 29 17:48:31 2010
In reply to: 841
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| Author: |
Zach |
| Type: |
Laser |
| Category: |
GYRO |
| Subject: |
Comparison of frequency noise and mechanical noise for the gyro cavity |
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Is there any reason to assume that it will be quieter on our table than it is on the 40m PSL table? I would imagine that our top-notch temperature control system ruins us at low frequency, while the chiller and all our other equipment must do wonders for us in the audio band.
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It looks like the laser frequency noise will be slightly too high to measure the vibration of the mirrors in the cavity using the control signal for the locking, especially if our cavity is quieter than the MZ at the 40m (which we are hoping it will be). It would still be nice to get a measurement of the mechanical noise of the mirrors somehow.
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Here is a plot of laser frequency noise from a Lightwave NPRO 126 laser converted into m*Hz-1/2 for comparison with mechanical noise taken from the MZ at the 40m.
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