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

R -- ADDED MEASUREMENT CAPABILITY FOR TO THE QUANTIZED HALL RESISTANCE STANDARD SOL 53SBNB967106 DUE 102299 POC Marsha Rodgers (301) 975-6398, FAX (301) 963-7732, or e-mail: marsha.rodgers@nist.gov 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) intends to negotiate on a sole source basis with University of Maryland, Dept of Physics Center for Superconductivity Research for the continuation of services on the quantized hall resistance standard for NIST's Electricity Division. This effort is to provide NIST with added measurement capabilility in order to investigate fundamental questions about the quantized Hall resistance standard. The principle measurement system shall be the potentiometric system. The DVM measurement system shall be used in situations which the potentiometric system cannot handle, such as comparing the current dependence with the temperature dependence. The tasks for the base period are as follows: TASK 1. Measure and document the leakage resistances of the automated digital voltmeter system, and compare the performance of this system with the automated potentiometric system. TASK 2. Develop the necessary hardware and software for computer-monitoring of the magnetic field generated by the 16 tesla superconducting magnet used for quantum Hall effect measurements. TASK 3. Use model calculations to predict and document the effects on the value of the ac quantized Hall resistance from measurements of the parasitic capacitances, inductances, and resistances of the NIST ac quantum Hall effect sample probe. The task for the option period is TASK 4. Aid NIST in understanding the fundamental properties of quantum Hall effect devices by making temperature-dependent and current-dependent measurements at the 0.1 parts-per-million level of accuracy using the automated potentiometric system and the automated digital voltmeter measurement system of Task 1, and producing a report of the results. This requirement is in part, an extension of efforts performed under previous Purchase Order No. 43NANB813655. The period of performance is for one year with an option to extend the period of performance for one year. FOB Destination Gaithersburg, MD. A Request for Quotation (RFQ) shall be issuedto the University of Maryland. This is being conducted as a sole source acquisition due to the current involvement in the effort by University personnel. It would not be possible for another source to achieve the necessary level of understanding in the time required for the completion of this contract. This is not a request for competitive quotes, and no solicitation document is available. Interested parties should submit a capability statement, to include evidence of their capability to respond to the requirement, no later than the response date above. If you have any questions regarding this announcement, please contact Marsha Rodgers on 301 975-6398 or via email marsha.rodgers@nist.gov. Posted 10/14/99 (W-SN391705). (0287)

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