Position Sensitive Scintillation Neutron Detectors Using a Crossed-Fiber Optic Readout Array

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The Spallation Neutron Source (SNS) under construction at the Oak Ridge National Laboratory will be the most important new neutron scattering facility in the United States. Neutron scattering instruments for the SNS will require large area detectors with fast response (< 1 microsecond), high efficiency over a wide range of neutron energies (0.1 to 10 eV), and low gamma ray sensitivity. We are currently developing area neutron detectors based on a combination of 6 LiF/ZnS scintillator screens coupled to a wavelength-shifting fiber optic readout array. A 25 x 25-cm prototype detector is currently under development. Initial tests at the High ... continued below

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4 pages

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Holcomb, D.E.; Hutchinson, D.P.; Ramsey, J.A. & Richards, R.K. July 18, 1999.

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Description

The Spallation Neutron Source (SNS) under construction at the Oak Ridge National Laboratory will be the most important new neutron scattering facility in the United States. Neutron scattering instruments for the SNS will require large area detectors with fast response (< 1 microsecond), high efficiency over a wide range of neutron energies (0.1 to 10 eV), and low gamma ray sensitivity. We are currently developing area neutron detectors based on a combination of 6 LiF/ZnS scintillator screens coupled to a wavelength-shifting fiber optic readout array. A 25 x 25-cm prototype detector is currently under development. Initial tests at the High Flux Isotope Reactor have demonstrated good imaging properties coupled with very low gamma ray sensitivity. In addition, we have developed a multi-layer scintillator/fiber detector to replace existing He-3 gas detector tubes for higher speed operation. This detector has demonstrated a neutron detection efficiency of over 75% at a neutron energy of 0.056 eV or about twice thermal. The response time of this detector is approximately 1 microsecond. Details of the design and test results of both detectors will be presented.

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4 pages

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  • SPIE's 44th Annual Meeting, Denver, CO, July 18-23, 1999

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  • Other: DE00009130
  • Report No.: ORNL/CP-103483
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 9130
  • Archival Resource Key: ark:/67531/metadc792810

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • July 18, 1999

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • Oct. 31, 2017, 2:44 p.m.

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Holcomb, D.E.; Hutchinson, D.P.; Ramsey, J.A. & Richards, R.K. Position Sensitive Scintillation Neutron Detectors Using a Crossed-Fiber Optic Readout Array, article, July 18, 1999; (digital.library.unt.edu/ark:/67531/metadc792810/: accessed September 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.