40m
QIL
Cryo_Lab
CTN
SUS_Lab
TCS_Lab
OMC_Lab
CRIME_Lab
FEA
ENG_Labs
OptContFac
Mariner
WBEEShop
|
40m Log |
Not logged in |
 |
|
Wed Nov 16 17:40:48 2011, Mirko, Update, IOO, MC unlocked and misaligned.
|
Wed Nov 16 18:14:09 2011, Koji, Update, IOO, MC unlocked and misaligned.
|
Wed Nov 16 20:30:27 2011, not Koji, Update, IOO, MC unlocked and misaligned.
|
Thu Nov 17 13:58:12 2011, Suresh, Update, IOO, MC unlocked and misaligned.
|
|
Message ID: 5917
Entry time: Wed Nov 16 20:30:27 2011
In reply to: 5916
Reply to this: 5925
|
Author: |
not Koji |
Type: |
Update |
Category: |
IOO |
Subject: |
MC unlocked and misaligned. |
|
|
Quote: |
Actually, do we need to reset the filter history at every lock loss of the MC?
Those DC offsets were necessary to keep the alignment good just until the MC is unlocked.
So if we keep the history, we can maintain the good alignment.
|
I suspect the integrators get fed a huge wrong signal on lockloss. Clearing the history on the trans DOFs when the MC was badly aligned gets it nicely aligned again. I switched off the alignment transmission DOFs for now. |