40m
QIL
Cryo_Lab
CTN
SUS_Lab
TCS_Lab
OMC_Lab
CRIME_Lab
FEA
ENG_Labs
OptContFac
Mariner
WBEEShop
|
40m Log |
Not logged in |
 |
|
Thu Jun 14 21:37:37 2012, yuta, Update, Green Locking, succeeded in 1FSR mode scan
|
Fri Jun 15 00:50:54 2012, yuta, Update, Green Locking, scanned Y arm for 5FSR
|
Fri Jun 15 01:53:05 2012, Koji, Update, Green Locking, scanned Y arm for 5FSR
|
Sat Jun 16 12:03:41 2012, Zach, Update, Green Locking, scanned Y arm for 5FSR
|
Sat Jun 16 13:01:17 2012, yuta, Update, Green Locking, scanned Y arm for 5FSR
|
Sat Jun 16 18:17:00 2012, yuta, Update, Green Locking, Y arm length using 5FSR scan 
|
Sat Jun 16 18:51:44 2012, Koji, Update, Green Locking, Y arm length using 5FSR scan
|
Sat Jun 16 19:32:11 2012, yuta, Update, Green Locking, Y arm length using 5FSR scan
|
|
Message ID: 6823
Entry time: Sat Jun 16 12:03:41 2012
In reply to: 6820
Reply to this: 6824
|
Author: |
Zach |
Type: |
Update |
Category: |
Green Locking |
Subject: |
scanned Y arm for 5FSR |
|
|
Is that time stamp really correct? I wanted to look at the signal closely to see if I could get any feeling for why it would look so different when positive vs. negative, but I do not see a triangle anywhere near this time (1023780144)...
Quote: |
Interesting. It seems for me that there is a dependence of the noisiness as the beat frequency is scanned.
As you increase (or decrease?) the offset, C1:ALS-BEATY-COARSE_I_IN1 becomes bigger and more crisp.
The resulting out-of-loop stability also seems to be improved as you can see from the crispness of the PDH signal.
Do you find why this happens? Is this because the beat S/N depends on the beat frequency due to the PD noise?
|
|