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Reports until 09:24, Tuesday 02 September 2014
H1 PSL (PSL)
peter.king@LIGO.ORG - posted 09:24, Tuesday 02 September 2014 (13697)
PSL Diagnostic Breadboard Scan
No ISS noise report will be generated this week as the ISS is still acting up - I didn't have the opportunity to look at it last week.  The alignment into the PMC should also be looked when the time opportunity arises.

The relative power noise measurement is consistent with the last measurement taken and is similar to the reference measurement on file.  Both are well within the requirements for the laser.

For frequency noise measurement the control signal looks nominal.  The error signal is noticeably different from the reference measurement for some reason.  It might be alignment related but will require checking.  It is known that the alignment into the reference cavity, and perhaps onto the RF photodetector, is slowly deteriorating.  This in turn is suspected due to a problem with the frequency shifting acousto-optic modulator.  That will also be looked at when time is granted by the integration crew.

The beam pointing measurement does not make sense compared to the one previously performed.  The numbers report as zero and the plots are significantly off.  The calibration age and control signals look comparable to the previous scan.  The error slopes in the current measurement are significantly off, which would explain the problem seen with the plots.
A second measurement (dbb_pnt-002) was done.  This measurement looks more like the others on file.  Not sure what was wrong with the first measurement other than perhaps the calibration age (~20 minutes) was too old?  The second measurement has calibration ages of less than 10 minutes.

The mode scan measurement is practically identical to the previous one.  Higher order mode content and power the same at 58 and 4.6% respectively.
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