Dynamic Fiber Optic Sensors Under Intense Radioactive Environments

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Description

A liquid mercury target will be used as the neutron source for the proposed Spallation Neutron Source facility. This target is subjected to bombardment by short-pulse, high-energy proton beams. The intense thermal loads caused by interaction of the pulsed proton beam with the mercury create an enormous rate of temperature rise ({approximately}10{sup 7} K/s) during a very brief beam pulse ({approximately } 0.5 {micro}s). The resulting pressure waves in the mercury will interact with the walls of the mercury target and may lead to large stresses. To gain confidence in the mercury target design concept and to benchmark the computer ... continued below

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8 Pages

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Allison, S.W.; Earl, D.D.; Haines, J.R. & Tsai, C.C. October 15, 1998.

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Description

A liquid mercury target will be used as the neutron source for the proposed Spallation Neutron Source facility. This target is subjected to bombardment by short-pulse, high-energy proton beams. The intense thermal loads caused by interaction of the pulsed proton beam with the mercury create an enormous rate of temperature rise ({approximately}10{sup 7} K/s) during a very brief beam pulse ({approximately } 0.5 {micro}s). The resulting pressure waves in the mercury will interact with the walls of the mercury target and may lead to large stresses. To gain confidence in the mercury target design concept and to benchmark the computer design codes, we tested various electrical and optical sensors for measuring the transient strains on the walls of a mercury container and the pressures in the mercury. The sensors were attached on several sample mercury targets that were tested at various beam facilities: Oak Ridge Electron Linear Accelerator, Los Alamos Neutron Science Center-Weapons Neutron Research, and Brookhaven National Laboratory's Alternating Gradient Synchrotron. The effects of intense background radiation on measured signals for each sensor are described and discussed. Preliminary results of limited tests at these facilities indicate that the fiber optic sensors function well in this intense radiation environment, whereas conventional electrical sensors are dysfunctional.

Physical Description

8 Pages

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American Nuclear Society, La Grange, IL (USA)

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  • Applications of Accelerator Technology (AccApp '98), Gatlinburg, TN (USA), September 20-24, 1998

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  • Other: DE00001716
  • Report No.: ORNL/CP-100113
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 1716
  • Archival Resource Key: ark:/67531/metadc667447

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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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  • October 15, 1998

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • Nov. 4, 2015, 1:58 p.m.

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Allison, S.W.; Earl, D.D.; Haines, J.R. & Tsai, C.C. Dynamic Fiber Optic Sensors Under Intense Radioactive Environments, article, October 15, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc667447/: accessed December 12, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.