LIGO Document E1000313-v2

aLIGO HAM-ISI, Test Report, Phase I: Assembly Validation, LHO Unit #4 (HAM2)

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E - Engineering documents
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HAM-ISI Unit #4 was built in March 2012. Tests presented here were performed between March 28th 2012 and April 4th 2012.

-This Unit received two production GS13s from Unit #2
-Full set of production GS13
-L4C Brackets but no L4C

Complementary inquiry:
Investigation of the effect of washers’ disposition/thickness on high frequency unwanted resonances/noise (LHO alog # 2520)

Minor issues that don’t imply further work:
-CPS gap measurement with a jig was waived to avoid scratching targets
-Excessive STD measured on CPSs is associated to ground motion

Minor issues that imply further work:
-Actuators linearity is within requirement. However the average slope deviation is out of spec. It seems to correlate with the cable+actuator resistance measurements. This observation needs to be correlated with the final measurements made with the in-field cables.

HAM-ISI Testing Phase I
Notes and Changes:
The assembly is validated.
Comments were added to failed tests.
Referenced by:

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