Description
The US Air Force is seeking sources capable of providing a complete, turn-key Quantum Hall Resistance (QHR) Standard Measurement System for the U.S. Air Force Primary Standards Laboratory (AFPSL). This high-performance system will serve as the absolute measurement reference for resistance, replacing the legacy Measurement International 6800C QHR System. The system must deliver non-stop, automated measurements across a primary range of 100 mΩ to 13 kΩ, offering exceptionally low measurement uncertainties. Key hardware requirements include a cryogen-free superconducting magnet system, an automated resistance ratio bridge, a low-thermal matrix scanner, and all necessary supporting cryogenics, temperature controllers, and vacuum pumps. The system must also feature a robust, automated software suite running on a Windows 11 LTSC 64-bit controller.
• The system must be capable of measuring a wide variety of resistive devices in four-terminal modes.
• The system must have a cryogen-free superconducting magnet system capable of housing the NIST Graphene QHR Chip.
• The system must have an automated resistance ratio bridge and a low-thermal matrix scanner with a minimum of 10 switchable input channels.
• The system must be designed for precision laboratory integration, fitting within a 3-foot by 6-foot floor space utilizing standard 19-inch rack mounting.