SAM #PR449089

Procurement of Polarizing Cavity and Magnetic Housing Assembly for GP-SANS Instrument at ORNL HFIR

Oak Ridge National Laboratory (ORNL), under the U.S. Department of Energy, is seeking a supplier for a complete polarizing cavity and magnetic housing assembly for the GP-SANS instrument at the High Flux Isotope Reactor (HFIR). - Government Buyer: - U.S. Department of Energy - Oak Ridge National Laboratory (ORNL) - High Flux Isotope Reactor (HFIR), Neutron Sciences Directorate - Products/Services Requested: - Complete polarizing cavity and magnetic housing assembly - Must accommodate a 4 cm x 4 cm neutron beam - Operate in transmission mode with super mirror coating (m=1) - Optimized for neutron wavelengths 4 to 10 angstroms - Minimum 95% neutron beam polarization and 30% transmission - Magnetic housing with specified saturation field and stray field limits - Includes lifting fixtures, threaded holes for neutron absorbing mask, and protective covers for shipping - Fabrication, inspection, and delivery required - OEMs and Vendors: - No specific OEMs or part numbers are mentioned - Unique/Notable Requirements: - Assembly must enable advanced polarization analysis and spin-resolved SANS measurements - Strict quality and design specifications for materials, fabrication, and inspection - Shipping and customs instructions provided for international suppliers - Offer validity period is 120 days from submission - Not a small business set-aside; fixed price procurement

Description

ORNL High Flux Isotope Reactor GP-SANS Polarizer

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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