Vacuum Compatibility, Cleaning Methods and Qualification Procedures

Document #:

LIGO-E960022-v22

Document type:

E - Engineering documents

Abstract:

This document sets forth the procedures and standards by which materials and parts to be used in LIGO interferometers may be qualified and assayed for compatibility.

Files in Document:

• E960022-v22.pdf (657.1 kB)

Other Files:

• E960022-v22.doc (1.5 MB)

Topics:

• Fabrication
• Cleaning
• Vacuum

Authors:

• Dennis Coyne

Keywords:

vacuum clean bake qualification

Notes and Changes:

•Clarified responsibilities of cognizant engineer and VRB
•Added section about DI water and inspection of DI water systems that supply Clean and Bake facilities
•Augmented fluoroelastomers section with reminder to maximize surface exposure and minimize surface contact during baking and made it explicit that CIT is the default site for baking ALIGO Viton, etc.
•Clarified OSEM cables and sensor probe sections
•Removed note about not using water on electro-polished parts
•Clarified labeling section to mention ICS generated labels
•Added explicit note about oven ramp up and cool down times for feed-throughs
•Updated optics cleaning and baking section to indicate VRB acceptance of “no bake” proposal
•Added section about Clean and Bake requests including link to CNB Ticketing System
•Clarified cleaning process for Macor
•Added process for cleaning Optics Lens Caps
•Added link to CNB of Siskiyou Mirror Mounts
•Added Zerodur and Invar clean and bake instructions
•Stuff that still needs to be done: clean and bake of anodized Al, clarification of CNB of taps, CNB of PEEK cable clamps, etc.

Related Documents:

• LIGO-T0900368: Allowable Bake Temperature for UHV Processing of Copper Alloys
• LIGO-E0900047: LIGO Contamination Control Plan