Contract

ORNL High Flux Isotope Reactor GP-SANS Polarizer

Agency: ENERGY, DEPARTMENT OF / ENERGY, DEPARTMENT OF
Location: Oak Ridge, TN
Amount: Amount not listed
Deadline: Closes in 16 days (Aug 3, 2026)
Posted: Jul 14, 2026
Set-aside: None (open competition)
NAICS code: 334516

What this contract is for

AMENDMENT 02: Extends Date Offers Due to 08/03/2026. CORRECTS Drawing Number in Attachment A - HFIR GP-SANS V-Cavity Equipment Specification Corrected.ADDS Attachment G - Drawing CG2-M-20-U-0018-R00 and Subdrawings. 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.

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