Neutron cameras for ITER

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Neutron cameras with horizontal and vertical views have been designed for ITER, based on systems used on JET and TFTR. The cameras consist of fan-shaped arrays of collimated flight tubes, with suitably chosen detectors situated outside the biological shield. The sight lines view the ITER plasma through slots in the shield blanket and penetrate the vacuum vessel, cryostat, and biological shield through stainless steel windows. This paper analyzes the expected performance of several neutron camera arrangements for ITER. In addition to the reference designs, the authors examine proposed compact cameras, in which neutron fluxes are inferred from {sup 16}N decay ... continued below

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19 p.

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Johnson, L.C.; Barnes, C.W. & Batistoni, P. December 31, 1998.

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Neutron cameras with horizontal and vertical views have been designed for ITER, based on systems used on JET and TFTR. The cameras consist of fan-shaped arrays of collimated flight tubes, with suitably chosen detectors situated outside the biological shield. The sight lines view the ITER plasma through slots in the shield blanket and penetrate the vacuum vessel, cryostat, and biological shield through stainless steel windows. This paper analyzes the expected performance of several neutron camera arrangements for ITER. In addition to the reference designs, the authors examine proposed compact cameras, in which neutron fluxes are inferred from {sup 16}N decay gammas in dedicated flowing water loops, and conventional cameras with fewer sight lines and more limited fields of view than in the reference designs. It is shown that the spatial sampling provided by the reference designs is sufficient to satisfy target measurement requirements and that some reduction in field of view may be permissible. The accuracy of measurements with {sup 16}N-based compact cameras is not yet established, and they fail to satisfy requirements for parameter range and time resolution by large margins.

Physical Description

19 p.

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INIS; OSTI as DE99001075

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  • 12. topical conference on high-temperature plasma diagnostics, Princeton, NJ (United States), 7-11 Jun 1998

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  • Other: DE99001075
  • Report No.: LA-UR--98-2202
  • Report No.: CONF-980605--
  • Grant Number: W-7405-ENG-36
  • DOI: 10.1080/10448639808233472 | External Link
  • Office of Scientific & Technical Information Report Number: 296790
  • Archival Resource Key: ark:/67531/metadc674262

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  • December 31, 1998

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 25, 2016, 9:51 p.m.

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Johnson, L.C.; Barnes, C.W. & Batistoni, P. Neutron cameras for ITER, article, December 31, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc674262/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.