Test Mass In Situ Cleaning Procedure

Document #:

LIGO-E1400472-v3

Document type:

E - Engineering documents

Abstract:

Although this document is written as a general in situ cleaning procedure for test mass optics, it is motivated by the need to clean residue from the perimeter of a central alignment window in a First Contact™ (FC) layer which has been observed in imaging of the H1 ETMy HR surface with Arm Length Stabilization (ALS) system green light (see LHO elog entry #15479):
https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=15479

Files in Document:

• E1400472-v3 Test Mass In Situ Cleaning Procedure.pdf (424.3 kB)

Other Files:

• E1400472-v2 TM in situ cleaning flow chart.vsdx (46.1 kB)
• E1400472-v3 Test Mass In Situ Cleaning Procedure.docx (6.0 MB)

Topics:

• System Engineering
• Core Optics

Authors:

• GariLynn Billingsley
• Dennis Coyne
• Norna Robertson
• Calum Torrie
• Betsy Weaver

Notes and Changes:

At GariLynn's request I switched the drag wipe procedure from T0900402 to E070304 (with acetone, not methanol). This procedure is now final for the H1 ETMy vent this week.

Related Documents:

• LIGO-E1000079: First Contact Brush and Pour Application Procedure
• LIGO-E1100439: General Optics Cleaning Procedure
• LIGO-E1201035: aLIGO Chamber Entry & Exit Procedures
• LIGO-E0900047: LIGO Contamination Control Plan
• LIGO-E070304: SPECIFICATION - Up-dated LIGO Optics Cleaning Specification Used in iLIGO and eLIGO