LIGO Document E1400261-x0

DCN aLIGO ETM Coating Specification

Document #:
LIGO-E1400261-x0
Document type:
E - Engineering documents
Abstract:
DCN for E0900068-v5 Advanced LIGO End Test Mass Coating Specification

ETM specification change Side 1 transmission requirement for 532 nm as follows:
Change from -v4: 0.03 - 0.15, goal of 0.05
Change to -v5: 0.01 to 0.04, goal of 0.032

Reason for change: Refinement of specification based on commissioning experience. 4 ETMs were delivered with S1 HR @ 532 nm significantly out of specification. Upon close examination of commissioning experience it was determined that the existing specification tolerance was too wide.

Apply to Serial numbers: 10, 11, 13, 14, 15, 16

Files in Document:
None
Topics:
Keywords:
ETM
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