The calibratinon is wrong at the moment, I think the OMC's automatic scaling during the hand off failed. Dan confirms that he's changed the order o power scaling / gain matching yesterday.
On the phone with sheila, I measure the DARM OLG, to be a factor of 0.63 too low, so with her advice, I've rescaled the sensing gain (in the LSC input matrix) by that same factor,
13.20723*1.5737 = 20.78447
then reconfirmed that both the DARM UGF is correct, as well as the DARM ASD on the wall matches the reference, and we're back in the reasonable Mpc range of ~55 [Mpc].
I'm now taking the full DARM OLGTF sweep, and if that's successful, I'll get the PCAL sweep as well.
daniel.hoak@LIGO.ORG - 19:30, Saturday 13 June 2015 (19129)
Just to clarify - while the DARM OLG did change due to the OMC-READOUT_ERR_GAIN setting, this wasn't due to edits to the OMC_LOCK code. It's not clear why the gain-matching calculation missed on this lock, it worked fine for subsequent locks. Looks like a one-off error.
Just to clarify - while the DARM OLG did change due to the OMC-READOUT_ERR_GAIN setting, this wasn't due to edits to the OMC_LOCK code. It's not clear why the gain-matching calculation missed on this lock, it worked fine for subsequent locks. Looks like a one-off error.