BSA Solicitation No.480664 - Amend. No.1. - Attachment (A).pdf

This document is a Requirements specification for the Design and Fabrication of Components for NSLS-II UHV (Ultra-High Vacuum) Systems, issued by Brookhaven National Laboratory on 12/18/2008 (Revision A).

The specification establishes technical and quality requirements for vendors fabricating vacuum chamber components and related parts for the National Synchrotron Light Source II project, which involves constructing an electron storage ring with a 792-meter circumference requiring ultrahigh vacuum conditions of 10^-10 mbar. Key technical requirements include: design minimization of gas loads through material selection and surface treatment; elimination of trapped volumes connecting to the main vacuum through small orifices; use of UHV-compatible materials limited to specific stainless steel grades (300-series VAR or ESR), aluminum alloys (2219, 5086, A6061-T6, A6063-T6), copper (oxygen-free grades), titanium (commercially pure, aircraft quality), and approved ceramics and refractories; prohibition of zinc, cadmium, elastomers, and organics with high outgassing rates. Fabrication processes must employ water-soluble machining lubricants only, TIG or electron beam welding with 100% penetration on the vacuum-side, and hydrogen or vacuum furnace brazing. All components require chemical cleaning, vacuum baking (stainless steel to 250°C, aluminum to 150°C), assembly in dedicated clean areas with controlled contamination protocols, and comprehensive acceptance testing including dimensional inspection, helium leak testing (maximum 2×10^-10 std.cc/sec), outgassing rate analysis, and bakeout validation. The document requires vendor submission of design reviews with detailed drawings and material certifications prior to procurement, notification of acceptance tests at least three weeks in advance, and delivery of Certificates of Conformance per BNL QA-101 standards. Quality Assurance requirements reference specific BNL-QA-101 clauses, and NSLS-II reserves inspection and test-witnessing rights before component delivery.