Kinetics of laser-pulse vaporization of uranium carbide by mass spectrometry. [LMFBR]

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The kinetics of uranium carbide vaporization in the temperature range 3000 K to 5200 K was studied using a Nd-glass laser with peak power densities from 1.6 x 10/sup 5/ to 4.0 x 10/sup 5/ watts/cm/sup 2/. The vapor species U, UC/sub 2/, C/sub 1/ and C/sub 3/ were detected and analyzed by a quadrupole mass spectrometer. From the mass spectrometer signals number densities of the various species in the ionizer were obtained as functions of time. The surface of the irradiated uranium carbide was examined by scanning electron microscope and the depth profile of the crater was obtained. In ... continued below

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Pages: 201

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Tehranian, F. June 1, 1983.

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Description

The kinetics of uranium carbide vaporization in the temperature range 3000 K to 5200 K was studied using a Nd-glass laser with peak power densities from 1.6 x 10/sup 5/ to 4.0 x 10/sup 5/ watts/cm/sup 2/. The vapor species U, UC/sub 2/, C/sub 1/ and C/sub 3/ were detected and analyzed by a quadrupole mass spectrometer. From the mass spectrometer signals number densities of the various species in the ionizer were obtained as functions of time. The surface of the irradiated uranium carbide was examined by scanning electron microscope and the depth profile of the crater was obtained. In order to aid analysis of the data, the heat conduction and species diffusion equations for the solid (or liquid) were solved numerically by a computer code to obtain the temperature and composition transients during laser heating. A sensitivity analysis was used to study the effect of uncertainties in the input parameters on the computed surface temperatures.

Physical Description

Pages: 201

Notes

NTIS, PC A10/MF A01; 1.

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  • Other Information: Portions are illegible in microfiche products. Thesis

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  • Other: DE83016602
  • Report No.: LBL-15982
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/5790424 | External Link
  • Office of Scientific & Technical Information Report Number: 5790424
  • Archival Resource Key: ark:/67531/metadc1097148

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  • June 1, 1983

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  • Feb. 18, 2018, 3:59 p.m.

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  • April 25, 2018, 4:17 p.m.

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Tehranian, F. Kinetics of laser-pulse vaporization of uranium carbide by mass spectrometry. [LMFBR], report, June 1, 1983; [Berkeley,] California. (digital.library.unt.edu/ark:/67531/metadc1097148/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.