aLIGO LHO Logbook

H1 AOS (INS, SUS)

jason.oberling@LIGO.ORG - posted 10:07, Tuesday 15 July 2014 (12750)

WBSC1 ITMy Alignment

IAS: D. Cook, J. Oberling

SUS: B. Weaver, T. Sadecki

After yesterday's alignment work, we did one final check on the ITMy this morning before the hand off for the output arm work. The ITMy alignment errors are currently:

X axis: -1.1 mm (south)
- Tolerance: ±1.0 mm
Y axis: -0.4 mm (east)
- Tolerance: ±3.0 mm
Z axis: +0.8 mm (high)
- Tolerance: ±1.0 mm
Pitch: 20 µrad down
- Tolerance: ±50 µrad
Yaw: 52 µrad CW
- Tolerance: ±50 µrad

It should be noted that the pitch is without the 352 µrad correction for the First Contact currently on the HR face of the ITMy; this will have to be corrected for after the output arm work, in addition to the yaw and the X axis position. Also, I applied a +40 yaw bias to the ITMy. This zeros the yaw in our alignment equipment (the current slider calibration is a little off).