IAS: J. Oberling
SUS: B. Weaver, T. Sadecki
Finished the ETMy cartridge alignment yesterday. The position & angular errors are as follows (all yaw reported as viewing the relevant optic from the top down):
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Longitudinal: -0.4 mm
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Lateral: +0.1 mm
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Vertical: -0.3 mm
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Pitch: 645 µrad down
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Target: 639 µrad down
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Error: 6 µrad down
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Tolerance: ±100 µrad
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Yaw: 80 µrad CCW
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Target: 0 µrad
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Tolerance: ±100 µrad
Also measured & aligned the ERMy (Note: the ERMy is aligned parallel to the AR surface of the ETMy) and measured the gap between the ETMy and ERMy.
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ETMy/ERMy Gap: 5.05 mm
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ERMy Pitch: 1.671 mrad down
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Target: 1.971 mrad down (to match the ETMy AR surface)
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Error: 300 µrad up
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Tolerance: ±1.47 mrad
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ERMy Yaw: 245 µrad CW
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Target: 80 µrad CCW (to match ETMy AR surface)
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Error: 325 µrad CW
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Tolerance: ±1.47 mrad
Note - we discovered yesterday that the Kentek gap detector was highly dependent on how level it's mounting was. So, the measurement is only good to about +/-0.25mm.