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40m Log |
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Wed Nov 4 00:10:43 2020, gautam, Update, General, Vent activities today    
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Thu Nov 5 22:27:34 2020, gautam, Update, General, Vent activities today
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Fri Nov 6 11:36:37 2020, gautam, Update, General, ETMY suspension eigenmodes 
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Tue Nov 10 15:13:41 2020, rana, Update, General, ETMY suspension eigenmodes
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Thu Nov 12 14:26:35 2020, gautam, Update, General, ETMY suspension eigenmodes
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Sun Nov 8 20:22:35 2020, gautam, Update, General, Vent activities today
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Sun Nov 8 23:24:29 2020, Koji, Update, General, Vent activities today
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Mon Nov 9 17:40:17 2020, gautam, Update, General, Pumpdown 
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Tue Nov 10 11:31:13 2020, Koji, Update, General, Pumpdown
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Message ID: 15671
Entry time: Tue Nov 10 15:13:41 2020
In reply to: 15661
Reply to this: 15673
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Author: |
rana |
Type: |
Update |
Category: |
General |
Subject: |
ETMY suspension eigenmodes |
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For the input matrix diagonalization, it seemed to me that when we had a significant seismic event or a re-alignment of the optic with the bias sliders, the input matrix also changes.
Meaning that our half-light voltage may not correspond to the half point inside the LED beam, but that rather we may be putting the magnet into a partially occluding state. It would be good to check this out by moving the bias to another setting and doing the ringdown there. |