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Mon Oct 9 01:29:26 2017, gautam, Update, LSC, DRMI Nosie Budget v3.0 7x
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Mon Oct 9 11:55:01 2017, Koji, Update, LSC, DRMI Nosie Budget v3.0
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Mon Oct 9 22:18:34 2017, gautam, Update, LSC, AS55Q Dark Noise
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Tue Oct 10 22:04:06 2017, rana, Update, LSC, AS55Q Dark Noise
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Wed Oct 11 14:42:03 2017, gautam, Update, LSC, AS55Q Dark Noise
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Wed Oct 11 19:31:32 2017, gautam, Update, LSC, AS55Q Dark Noise
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Thu Oct 12 01:50:11 2017, gautam, Update, LSC, AS55Q Dark Noise
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Thu Oct 12 12:17:28 2017, gautam, Update, LSC, AS55Q Dark Noise
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Fri Oct 13 12:26:12 2017, gautam, Update, LSC, AS55Q Dark Noise
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Mon Oct 16 16:01:04 2017, gautam, Update, LSC, AS55Q Dark Noise 
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Tue Oct 17 19:31:53 2017, gautam, Update, LSC, AS55Q Dark Noise 
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Tue Nov 7 17:45:05 2017, gautam, Update, LSC, DRMI Nosie Budget v3.1   
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Tue Nov 7 22:56:21 2017, gautam, Update, LSC, DRMI locking recovered
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Wed Nov 8 00:28:16 2017, gautam, Update, LSC, Laser intensity coupling measurement attempt
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Wed Nov 8 09:37:45 2017, rana, Update, LSC, DRMI Nosie Budget v3.1
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Wed Nov 8 09:59:12 2017, gautam, Update, LSC, DRMI Nosie Budget v3.1
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Wed Nov 15 01:37:07 2017, gautam, Update, LSC, DRMI low freq. nosie improved 
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Thu Nov 16 00:53:26 2017, gautam, Update, LSC, DRMI noise sub-budgets 
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Message ID: 13415
Entry time: Wed Nov 8 09:37:45 2017
In reply to: 13412
Reply to this: 13416
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Author: |
rana |
Type: |
Update |
Category: |
LSC |
Subject: |
DRMI Nosie Budget v3.1 |
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why no oplev trace in the NB ?
#4 shows the noise budget from the October 8 DRMI lock with the updated SRCL->MICH and PRCL->MICH couplings (assumed flat, extrapolated from Attachment #2 in the 120-180Hz band). If these updated coupling numbers are to be believed, then there is still some unexplained noise around 100Hz before we hit the PD dark noise. To be investigated. But if Attachment #4 is to be believed, it is not surprising that there isn't significant coherence between SRCL/PRCL and MICH around 100Hz
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also, this method would work better if we had a median averaging python PSD instead of mean averaging as in Welch's method. |