robert.schofield@LIGO.ORG - posted 18:47, Friday 28 June 2024 (78734)
Slow changes of ITMY ESD bias during observation
I made slow (ramp time = 120s) changes of the ITMY ESD bias today during observation mode in order to find a minimum in electronics ground noise coupling, using coherence between DARM and a current clamp on a grounding cable as the figure of merit. This project will continue, but I am done for the day and wanted to get today's times into the alog.
|
Start of change (GPS) |
End of change (GPS) |
ITMX bias at start (V) |
ITMX bias at end (V) |
ITMY bias at start (V) |
ITMY bias at end (V) |
|
1403651100 |
1403651220 |
0 |
0 |
0 |
-39 |
|
1403653448 |
1403653569 |
0 |
0 |
-39 |
170 |
|
1403655679 |
1403655799 |
0 |
0 |
170 |
-222 |
|
1403657640 |
1403657760 |
0 |
0 |
-222 |
0 |
|
|
|
|
|
|
|