|
40m
QIL
Cryo_Lab
CTN
SUS_Lab
TCS_Lab
OMC_Lab
CRIME_Lab
FEA
ENG_Labs
OptContFac
Mariner
WBEEShop
|
| PSL |
Not logged in |
 |
|
|
 Thu Nov 18 00:28:28 2010, koji, tara, DailyProgress, NoiseBudget, Noise from scattering light near the cavity's foam cap opening 
|
 Thu Nov 18 03:10:03 2010, Koji, DailyProgress, NoiseBudget, Noise from scattering light near the cavity's foam cap opening
| |
Thu Nov 18 14:17:45 2010, tara, DailyProgress, NoiseBudget, Noise from scattering light near the cavity's foam cap opening
| |
Thu Nov 18 15:09:22 2010, Koji, DailyProgress, NoiseBudget, Noise from scattering light near the cavity's foam cap opening
| |
Thu Nov 18 21:42:33 2010, tara, DailyProgress, NoiseBudget, Noise from scattering light near the cavity's foam cap opening
| |
Thu Nov 18 22:23:20 2010, Koji, DailyProgress, NoiseBudget, Noise from scattering light near the cavity's foam cap opening
| |
Fri Nov 19 01:21:53 2010, tara, DailyProgress, NoiseBudget, Noise from scattering light near the cavity's foam cap opening
|
|
|
Message ID: 397
Entry time: Thu Nov 18 03:10:03 2010
In reply to: 396
Reply to this: 398
|
| Author: |
Koji |
| Type: |
DailyProgress |
| Category: |
NoiseBudget |
| Subject: |
Noise from scattering light near the cavity's foam cap opening |
|
|
- Even after the removal of the Al tip, the scattered light noise looks still exist.
- Particularly I still could see apparent fringe wrapping when I shook the table or touch the foam construction.
- I still could not reject the possibility of the backscattering towards the PMC.
- We had the fringe wrapping up to ~200Hz. This corresponds to the motion of the scattered body or the optical
path for the scattered light by ~100um. Is that possible?
- The VCO feedback and the beat note PLL feedback seemed to have the same information so far.
- The lollipops at the trans mission ports are terrible. They are mechanically incorrect.
- What is the correct conversion between the VCO feedback and the beat note PLL feedback??
Both are VCO feedback signals but the slope looks different. Need precise investigation.
|
|
|