borja.sorazu@LIGO.ORG - posted 23:23, Tuesday 05 August 2014 (13229)
Balancing coils at SR2 stages M2 and M3 + Issue reported regarding UL coil on SR2 stage M2
(Borja)
I have continued the coil balancing work that Jeff and Arnauld did yesterday (aLog entry 13203). In these measurements I have concentrated on SR2 and redone stage M3 (with an improved balance) and tried to balance stage M2, however in trying to do so I encountered some problem as reported on the notes attached below, it is worth noticing that tunning of the UL coil on stage M2 has no effect at all on the output signals which may indicate that the coil is actually not connected.
Summary of balancing performance:
| SUS | STAGE |
|
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| SR2 |
|
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Summary of the optimum balancing Gains:
| SUS | STAGE | OSEM | GAIN |
| SR2 | M2 | UL | 1 |
| LL | -1.95 | ||
| UR | -1.26 | ||
| LR | 0.09 | ||
| M3 | UL | 0.976 | |
| LL | -1.1 | ||
| UR | -1.005 | ||
| LR | 0.963 |
Images attached to this report
Non-image files attached to this report
