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The Measurement Of Energy Transfer In Gas Solid Surface Interactions Using Electron Beam Excited Emission Of Light
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Book Synopsis The Measurement of Energy Transfer in Gas-solid Surface Interactions Using Electron Beam Excited Emission of Light [microform] by : David John Marsden
Download or read book The Measurement of Energy Transfer in Gas-solid Surface Interactions Using Electron Beam Excited Emission of Light [microform] written by David John Marsden and published by National Library of Canada. This book was released on 1964 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new approach is described to the measurement of energy accommodation of a rarefied gas at a solid surface. Gas molecules from a surrounding gas in thermal equilibrium and at rest are incident on a cooled metal target disc. Under conditions of free-molecule-flow the incident molecules are not disturbed by the cooler reflected molecules. A high energy electron beam is passed through the gas in front of the target disc and parallel to it, exciting the gas to electroluminescence. The rotational energy distribution and number density of molecules can be determined from a spectrographic analysis of the light emitted by the gas. The contribution to the measured intensity of spectrum lines due to the incident molecules can be determined with the target retracted, and then subtracted from total light intensity measurements made with the target in position in order to get the rotational energy distribution and number density of the reflected molecules alone. Measurements made with nitrogen on a silver target showed that the translational and rotational degrees of freedom both had an accommodation coefficient alpha = 0.85, and that the rotational energy distribution of the reflected molecules corresponded to that of gas in thermal equilibrium.
Book Synopsis The Measurement of Energy Transfer in Gas-solid Surface Interactions Using Electron Beam Excited Emission of Light by : D. J. Marsden
Download or read book The Measurement of Energy Transfer in Gas-solid Surface Interactions Using Electron Beam Excited Emission of Light written by D. J. Marsden and published by . This book was released on 1964 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new approach is described to the measurement of energy accommodation of a rarefied gas at a solid surface. Gas molecules from a surrounding gas in thermal equilibrium and at rest are incident on a cooled metal target disc. Under conditions of free-molecule-flow the incident molecules are not disturbed by the cooler reflected molecules. A high energy electron beam is passed through the gas in front of the target disc and parallel to it, exciting the gas to electroluminescence. The rotational energy distribution and number density of molecules can be determined from a spectrographic analysis of the light emitted by the gas. The contribution to the measured intensity of spectrum lines due to the incident molecules can be determined with the target retracted, and then subtracted from total light intensity measurements made with the target in position in order to get the rotational energy distribution and number density of the reflected molecules alone. Measurements made with nitrogen on a silver target showed that the translational and rotational degrees of freedom both had an accommodation coefficient alpha = 0.85, and that the rotational energy distribution of the reflected molecules corresponded to that of gas in thermal equilibrium.
Book Synopsis The measurement of energy transfer in gas-solid surface interactions using electron beam excited emisssion of light by : D. J. Marsden
Download or read book The measurement of energy transfer in gas-solid surface interactions using electron beam excited emisssion of light written by D. J. Marsden and published by . This book was released on 1964 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the OAR Research Applications Conference by :
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Book Synopsis Government-wide Index to Federal Research & Development Reports by :
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Book Synopsis Progress Report on Research Supported by Grants from the Defense Research Board of Canada by : University of Toronto. Institute for Aerospace Studies
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Book Synopsis Report of the President by : University of Toronto
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