Quote from #6128 |
To test it, we are shaking all of the suspension biases +/-1.0 with a script.
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The hysteresis test has been aborted.
All of the suspensions have accumulated unexpectedly big DC biases of about 5 from their nominal points.
In fact the ITMX and ITMY mirrors started being stacked to their OSEMs.
The script process has been force-quit and I have restored all the DC biases to their nominal points.
They still look okay: MC can be locked at the 00 mode, DRMI fringe is visible at AS, the green beams are resonating the arm cavities
Need another trial. |