Field ion microscopy study of depleted zones in tungsten after proton irradiation

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Depleted zones in tungsten, that resulted from medium-energy proton irradiations, were studied using the Field Ion Microscope (FIM). The shapes and sizes of depleted zones is an important aspect of basic radiation damage. These data can be compared to models that have been suggested as well as aid development of new models. These depleted volumes are of interest not only for an understanding of basic radiation effects, but also because they affect material properties and can act as nucleation sites for voids or gas bubbles. Depleted zones were produced in annealed tungsten wires by irradiation with 600 to 800 MeV ... continued below

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Pages: 18

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Farnum, D.J.; Sommer, W.F.; Inal, O.T. & Yu, J. January 1, 1986.

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Description

Depleted zones in tungsten, that resulted from medium-energy proton irradiations, were studied using the Field Ion Microscope (FIM). The shapes and sizes of depleted zones is an important aspect of basic radiation damage. These data can be compared to models that have been suggested as well as aid development of new models. These depleted volumes are of interest not only for an understanding of basic radiation effects, but also because they affect material properties and can act as nucleation sites for voids or gas bubbles. Depleted zones were produced in annealed tungsten wires by irradiation with 600 to 800 MeV protons at the Los Alamos Meson Physics Facility. The defects observed in the irradiated samples included vacancies, depleted zones, grain boundaries, and dislocations. Single vacancies were the most commonly observed defect. Of the samples ''imaged,'' over 50 depleted zones were found within the area of high resolution in the area between the prominent (112) poles in a (110) oriented sample. The number of layers photographed in each sample was dependent upon the initial shape of the tip and ranged from 60 to 200 (110) sequential layers.

Physical Description

Pages: 18

Notes

NTIS, PC A02/MF A01; 1.

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  • 2. international conference on fusion reactor materials (ICFRM-2), Chicago, IL, USA, 13 Apr 1986

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  • Other: DE86010165
  • Report No.: LA-UR-86-1156
  • Report No.: CONF-860421-29
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5774214
  • Archival Resource Key: ark:/67531/metadc1096615

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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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  • January 1, 1986

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  • Feb. 18, 2018, 3:59 p.m.

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  • March 28, 2018, 1:48 p.m.

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Farnum, D.J.; Sommer, W.F.; Inal, O.T. & Yu, J. Field ion microscopy study of depleted zones in tungsten after proton irradiation, article, January 1, 1986; United States. (digital.library.unt.edu/ark:/67531/metadc1096615/: accessed April 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.