40m
QIL
Cryo_Lab
CTN
SUS_Lab
TCS_Lab
OMC_Lab
CRIME_Lab
FEA
ENG_Labs
OptContFac
Mariner
WBEEShop
|
40m Log |
Not logged in |
 |
|
Sun Apr 29 22:53:06 2018, gautam, Update, General, DARM actuation estimate
|
Tue May 1 19:37:50 2018, gautam, Update, General, DARM actuation estimate 
|
Mon May 7 16:23:06 2018, gautam, Update, General, DARM actuation estimate  
|
Mon May 7 20:01:14 2018, Rorpheus, Update, General, Use anti-dewhitening + show CARMA/DARMA
|
Thu May 10 14:13:22 2018, gautam, Update, General, More refinement of DARM control signal projection  
|
Fri May 11 13:58:42 2018, rana, Update, General, More refinement of DARM control signal projection
|
Fri May 11 19:02:52 2018, gautam, Update, General, More refinement of DARM control signal projection    
|
Sat May 12 10:02:03 2018, rana, Update, General, More refinement of DARM control signal projection
|
Sun May 20 17:43:01 2018, rana, Update, Electronics, How to choose resistors
|
Mon May 14 18:58:32 2018, Kevin, Update, PonderSqueeze, Squeezing with no SRM  
|
Tue Oct 2 23:57:16 2018, gautam, Update, PonderSqueeze, Squeezing scenarios
|
Tue May 15 21:56:57 2018, gautam, Update, General, Stack measurement setup decommissioned
|
Thu May 17 09:14:38 2018, Steve, Update, General, Stack measurement setup decommissioned 
|
|
Message ID: 13833
Entry time: Fri May 11 13:58:42 2018
In reply to: 13831
Reply to this: 13835
13846
|
Author: |
rana |
Type: |
Update |
Category: |
General |
Subject: |
More refinement of DARM control signal projection |
|
|
I think "OLG" trace is not labeled right; it would be good to see the actual OLG in addition to whatever that trace actually is.
Based on the first plot, however, my conclusion is that:
- we don't need the passive isolator to reduce the control signal; the control signal is dominated by f < 10 Hz.
- we should still look into isolators for the reduction of the f > 50 Hz stuff, just to make the overall DARM sensitivity better. But this does not have to be pneumatic since we no longer need 10 Hz isolation. It can instead be a solid piece of rubber to give us a ~20-30 Hz resonance. That would still give us a factor of 5-10 improvement above 100 Hz.
- In this case, we only need a mass estimate of the end chamber contents with an accuracy of ~25%. If we think we have that already, we don't need to keep doing the jacks-strain gauge adventure.
|