aLIGO HAM-ISI, Test Report, Phase I: Assembly Validation, LHO Unit #6 (HAM5)

Document #:

LIGO-E1000323-v3

Document type:

E - Engineering documents

Abstract:

HAM-ISI Unit #6 was assembled during June 2012. The testing of this Unit is presented here. It started on June 18th and lasted until July 14th.Tests were performed in accordance with E1000309-V12 procedure.

Particularities:
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- CPS & lockers were set before strong temperature changes caused the blades to sag.
- Full set of production GS13s
- L4Cs and brackets installed

Minor issues that don’t imply further work:
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- CPS gap measurement with a jig was waived to avoid scratching targets

Minor issues that imply further work:
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- Actuators linearity is within requirement. However the average slope deviation is slightly of specifications on H1. It seems to correlate with the cable+actuator resistance measurements. This observation needs to be confirmed with the final measurements made with the in-field cables.
- The simulation, and implementation, of the damping loops represent a “bonus test” and was not performed because of delays caused by omissions in assembly, instrument failure and strong temperature changes.
- CPS and lockers were set before strong temperature changes caused the blades to sag. They might have to be reset once the ISI is installed in the IFO.

Files in Document:

• E1000323-v3_HAM_ISI_Unit_6_Testing_Phase_I_Report.pdf (29.5 MB)

Other Files:

• E1000323-v3_HAM_ISI_Unit_6_Testing_Phase_I_Report.docx (24.0 MB)

Topics:

• Subsystem Test
• Seismic Isolation

Authors:

• Hugo Paris
• Fabrice Matichard
• Jim Warner
• Hugh Radkins
• Mitchell Robinson
• Corey Gray
• Greg Grabeel
• Eric Allwine
• Vincent Lhuillier

Keywords:

HAM-ISI Assembly Validation Testing

Notes and Changes:

Corrected a typo on V3 ADE box S/N , page 5.

Added page numbers

Referenced by:

• LIGO-E1100996: aLIGO HAM-ISI, Phase I Testing Reports