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Reports until 09:12, Friday 23 September 2016
H1 IOO (IOO, SUS)
cheryl.vorvick@LIGO.ORG - posted 09:12, Friday 23 September 2016 (29940)
correcting the IM alignment sliders - gain and urad/slider_count

I'm not sure how the gains on the IM alignment sliders were set, but currently pitch is at 0.023urad/slider_count, and yaw is at 0.085urad/slider count.

So the motion per 1 slider count for pitch is much different than for yaw, and I think it would be good to correct this.

I've attached a chart showing the current and target alignment slider gains, and the current and target alignment slider urad/slider_count.

I set the target urad/slider_count at 0.01, so 100 counts on the slider is equal to 1urad change in optic position, and I'm not sure how that compares to other optics, but is reasonable for the IMs.

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Displaying report 1-1 of 1.