E080512_ETM_Polishing_Specification

Document #:

LIGO-E080512-v6

Document type:

E - Engineering documents

Abstract:

Advanced LIGO ETM Polishing Specification

Files in Document:

• ETM Polishing Spec E080512-v6.pdf (195.5 kB)

Other Files:

• ETM Polishing Spec E080512-v6.docx (39.2 kB)
• For future reference, post O5 (Redline_toTM_Polishing_Spec.pdf, 150.3 kB)

Topics:

• Final Design
• Core Optics

Authors:

• Mick Flanigan

Notes and Changes:

Section: Surface Figure, measured over the central 160 mm diameter
Change
from: 2245 -5+15 m
to: 2240 ± 10 m

Change
ROC precision
From: R ± 3 m where 2240 m ≤ R ≤ 2260 m for all ETM optics
To: R ± 3 m where 2230 m ≤ R ≤ 2250 m for all ETM optics

The analysis for this change is presented in G2001920

Referenced by:

• LIGO-E2000633: DCN for update of End Test Mass specifications - change radius of curvature requirement
• LIGO-D080658-v6: aLIGO, COC End Test Mass (ETM) Substrate (D080658_ALIGO COC_ETM_SUBSTRATE)