ORNL High Flux Isotope Reactor GP-SANS Polarizer

AMENDMENT 02: Extends Date Offers Due to 08/03/2026. The High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory (ORNL) is a high-flux research reactor that, in addition to isotope production, serves as a steady-state neutron source for a suite of neutron scattering instruments. Among these, the General-Purpose Small-Angle Neutron Scattering (GP-SANS) instrument is being upgraded to incorporate incident beam polarization capabilities. This enhancement will enable spin-resolved SANS measurements, allowing for the separation of nuclear and magnetic scattering components and facilitating studies of magnetic order, spin textures, and correlated spin structures. A critical component of this upgrade is the integration of a polarizing cavity, which utilizes magnetized supermirrors or transmission-based polarizers to produce a beam of neutrons in a well-defined spin state prior to their interaction with the sample. This capability is essential for conducting polarization analysis and advanced techniques such as polarization contrast measurements and vector-magnetic SANS. This specification defines requirements for materials of construction, fabrication, inspection, and delivery to the Company of a complete polarizing cavity and magnetic housing assembly. The polarizing cavity and magnetic housing assembly shall be installed at the GP-SANS instrument.

• NAICS334516
• PSC6640

• Attachment C - Prime-Flowdown-Clauses-BSD-CS-2258-01.13.2026-1.pdf

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• Attachment G - Drawing CG2-M-20-U-0018-R00 and Subdrawings.pdf

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• Attachment E - Reps-and-Certs-Abbreviated-2026.03.09.pdf

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• Attachment B - Terms-Conditions-Fixed-Price-BSD-CS-2150-10.01.2025.pdf

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• Attachment D - Reps-and-Certs-International-2025.10.01.pdf

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• RFP PR449089 GP-SANS Polarizer Amendment 03.pdf

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• Attachment F - Exhibit-2-Rep-Limited-Rights-Data-Restricted-Computer-Software-2025.10.13.pdf

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• Attachment H - Q and A to Offerors.pdf

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• Attachment A - HFIR GP-SANS V-Cavity Equipment Specification Corrected.pdf

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• Bill Mitchum
  mitchumwc@ornl.gov865-341-2745
• Markus Camfield
  camfieldma@ornl.gov865-241-6119