aLIGO LHO Logbook

H1 AOS

jason.oberling@LIGO.ORG - posted 15:31, Thursday 17 October 2013 - last comment - 08:07, Friday 18 October 2013(8150)

WBSC9 ETMx Alignment

IAS: J. Oberling

SEI: J. Warner, G. Grabeel

We aligned the Y and Z (lateral and vertical, repsectively) positions and Yaw of the ETMx this morning via HEPI adjustments (position coordinates are local to End X):

Y axis position: -199.93 mm
- Target: -200.0 mm
- Error: +0.07 mm
- Tolerance: ±1.0 mm
Z axis position: -79.97 mm
- Target: -80.0 mm
- Error: +0.03 mm
- Tolerance: ±1.0 mm
Yaw: 6 µrad CCW
- Target: 0 µrad
- Error: 6 µrad
- Tolerance: ±10 µrad

Comments related to this report

greg.grabeel@LIGO.ORG - 17:05, Thursday 17 October 2013 (8155)

Link

The final dial indicator values for those values.

	1	2	3	4
X	0.532	--	--	0.623
Y	0.203	0.329	0.636	0.542
Z	0.419	0.430	0.406	0.474

(Corner 4 X value is so different because I was reading the dial indicator differently, it didn't actually change that much.)

jim.warner@LIGO.ORG - 08:07, Friday 18 October 2013 (8158)

Link

Greg and I also did a quick measurement of the level after alignment. I didn't try to calculate a height, but the table is level to within .010" over the span of the optical table, with 3 of 4 corners being more like .005" difference. This agrees with the spec used for the test stands, so I assume this is good enough.