National Institute of Standards & Technology, Acquisition & Assistance Div.,100 Bureau Drive Stop 3572, Bldg. 301, Rm B117, Gaithersburg, MD 20899-3572

66 -- ORDELA MODEL 2320N NETRON POSITION-SENSITIVE SOL 53SBNB9C1068 POC Carolyn Wilder (301) 975-8332/Pauline Mallgrave (301) 975-6330 WEB: NIST Contracts Homepage, http://www.nist.gov/admin/od/contract/contract.htm. E-MAIL: NIST Contracts Office, Contract@nist.gov. The National Institute of Standards and Technology (NIST) has a requirement for an Ordela Model 2320N Neutron Position-Sensitive Proportional Counters (PSPC) and a Data Acquisition System (DAS) for Ordela Model 2320N PSPC. The PSPC is required to meet the following requirements. Performance Specifications: (1) Active Area: 32 cm x 32 cm, (2) Spatial Resolution: 1.0 cm x 1.0 cm, full-width at half-maximum (FWHM), (3) Picture Elements (pixels): 32 x 32 (1024 total), (4) Counting Gas: helium-3, (5) Stopping Gas: carbon tetrafluoride, CF4, (6) Detection Efficiency: 85% for 5 neutrons, 65% for 3, 50% for 2, (7) Count Rate Capability: 105 neutrons per second (104 neutrons per pixel per second) for 10% coincidence losses, (8) Gas Multiplication Factor: < 50, (9) Spatial Uniformity: 2% integral, 10% differential, (10) Linearity: 1 mm integral, 0.5 mm differential and (11) Bias Voltage: < 3500 V. Physical Specifications. (1) Body and Window: Aluminum, (2) Overall Dimensions: < 65 cm diameter, < 30 cm high and (3) Window Thickness: < 1 cm. The DAS shall meet the following Physical Requirements: (1) DAS must provide programmed control of all essential PSPC operations such as acquire, stop clear, time slicing, data storage, and display. (2) All PSPC electronic tuning parameters (e.g. amplifier gains and discriminator levels) must be remotely adjustable from the DAS. (3) DAS must digitize and store event locations and time stamp each event relative to an externally provided trigger signal with time resolution of < 500 ns. (4) DAS must have 1K memory bins -- one for each pixel- that can be polled and cleared without interruption of the counting process (i.e. memory must be dual ported). (5) DAS must include an Ethernet interface for data transfer to a remote computer system. Other Requirements: (1) PSCP must operate in a vacuum environment. (2) All PSPC electronic circuits must be contained in a sealed enclosure located on the PSPC back plane. This enclosure must contain at least two ports for venting to atmosphere to allow operation of the electronics in air. (3) PSPC must be supplied with an operations manual and documentation of test results that verify the above performance specifications. Delivery is required within 12 months ARO. The Government anticipates the award of a fixed price contract. The proposed requirement is for equipment for which the Government intends to solicit and negotiate with only one source under authority of FAR 6.301-1. Interested persons may identify their interest and capability to respond to the requirement or submit proposals. This notice of intent is not a request for competitive quotation. However, the government will consider all proposals received within fifteen (15) days after date of publication of this synopsis. A determination by the Government not to compete this proposed requirement based upon responses to this notice is solely within the discretion of the government. Information received will normally be considered solely for the purpose of determining whether to conduct a competitive procurement. A Request for Quotation (RFQ) package is not available.-It is the Government's intent to negotiate with Ordela, Inc., 1009 Alvin Weinberg Drive, Oak Ridge, TN 37830, the only responsible source that can satisfy the agency's requirements. Posted 07/15/99 (W-SN354536). (0196)

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