DESIGN AND DEVELOPMENT OF FAST-RESPONSE THERMOPILE-TYPE NEUTRON-FLUX- SENSITIVE DEVICE. Final Report, Phase 2

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A program was directed toward development of a thermopile-type neutron- flux-sensitive meter of small physical size and having a fast response time (25 msec) and a high signal output. The meter configuration selected consists essentially of a metallic heat sink, a thermopile, and a thin layer of neutron- sensitive material in series. When the meter is exposed to a neutron environment, heat generated in the neutron-sensitive material flows across the thermopile unit to the heat sink. The signal output generated by the thermopile is proportional to the heat flow, which is in turn proportional to the neutron flux. Signal-output characteristics ... continued below

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Pages: 39

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Gee, L.J. October 31, 1962.

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  • Advanced Technology Laboratories
    Publisher Info: Advanced Technology Labs., Div. of American-Standard, Mountain View, Calif.
    Place of Publication: Mountain View, California

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Description

A program was directed toward development of a thermopile-type neutron- flux-sensitive meter of small physical size and having a fast response time (25 msec) and a high signal output. The meter configuration selected consists essentially of a metallic heat sink, a thermopile, and a thin layer of neutron- sensitive material in series. When the meter is exposed to a neutron environment, heat generated in the neutron-sensitive material flows across the thermopile unit to the heat sink. The signal output generated by the thermopile is proportional to the heat flow, which is in turn proportional to the neutron flux. Signal-output characteristics of meters of this configuration have been verified by experimental testing in the Battelle Research Reactor, the General Electric NTR Reactor, and the Materials Testing Reactor (Idaho Falls). A practical neutron meter, in which the sensing element measures approximately 1/8 in. x 1/2 in. x 1 in., with a time constant of less than 25 msec and a millivolt- level signal output at a thermal-neutron flux of 10i/sup 12/n/cm/sup 2/-sec was achieved, thus substantially fulfilling the program objectives. (J.R.D.)

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Pages: 39

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  • Other Information: Orig. Receipt Date: 31-DEC-63

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  • Report No.: ATL-A-124
  • Grant Number: AT(04-3)-250
  • DOI: 10.2172/4733133 | External Link
  • Office of Scientific & Technical Information Report Number: 4733133
  • Archival Resource Key: ark:/67531/metadc1027680

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  • October 31, 1962

Added to The UNT Digital Library

  • Oct. 18, 2017, 7:39 a.m.

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  • Jan. 12, 2018, 4:12 p.m.

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Gee, L.J. DESIGN AND DEVELOPMENT OF FAST-RESPONSE THERMOPILE-TYPE NEUTRON-FLUX- SENSITIVE DEVICE. Final Report, Phase 2, report, October 31, 1962; Mountain View, California. (digital.library.unt.edu/ark:/67531/metadc1027680/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.