LIGO Vacuum Compatible Materials List

Document #:

LIGO-E960050-v2

Document type:

E - Engineering documents

Abstract:

LIGO Vacuum Compatible Materials List

Files in Document:

• E960050-v2_Vacuum_Compatible_Materials_List.pdf (file is not accessible)

Other Files:

• E960050-v2_Vacuum_Compatible_Materials_List.doc (file is not accessible)

Topics:

• Fabrication
• Vacuum
• Final Design

Authors:

• Dennis Coyne

Keywords:

UHV materials

Notes and Changes:

• Removed distinction between initial and advanced LIGO for approval
• Made an explicit notation in the materials list if the use of a material is restricted (or not)
• Moved a number of materials from the provisionally approved to the approved list, although in some cases with restrictions (e.g. carbon steel, Sm-Co, Nd-Fe-B, Vac-Seal, copper, Tin-Lead solder, etc.) and removed the provisional list from the document
• Added a number of materials to the approved list, although in some cases with restrictions (e.g. adhesives, aluminum bronze, etc.)
• Added a few materials to the explicitly excluded list, e.g. aluminum alloy 7000 series, brass (aka manganese bronze), free-machining grades of stainless steel (303, 303S, 303Se) except as small fasteners, etc.
• Added a number of references
• Added a section on general restrictions on materials (e.g. no castings, material certifications are always required, only the grades and sources called out for the polymers are permitted, etc.)
• Most outgassing rate values remain blank in the materials list (pending)

Need a better description of the approved cable assemblies