Out-of-plane Scattering of an Argon Molecular Beam by Heated Platinum PDF Download
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Author: Arthur Robert Rudnicki (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 160
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Author: Arthur Robert Rudnicki (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 160
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Author: James Patrick Moran
Publisher:
ISBN:
Category : Argon
Languages : en
Pages : 216
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Book Description
Time-of-flight (TOF) measurements were made in both heated and unheated initially mono-energetic argon beams before and after reflection from heated platinum targets. A new and quite simple beam source is described which generates the high intensity, nearly mono-energetic incident beam. Targets were prepared by chemical cleaning. Beams directed at these targets were reflected in directed nonspecular lobes and the molecular TOF distributions in these lobes were investigated. Low order moments of the velocity distribution are obtained directly from the TOF data by integrating the TOF curves after they are weighted by appropriate, derived functions. Relative number flux, momentum flux and energy flux are obtained and ratios of these fluxes yield mean speed and mean energy as a function of angle of reflection. These flux moments are also used to calculate a speed ratio which provides a measure of spread in speed distribution divided by the mean speed. These integrated results are presented for incident beam angles of 20, 40, 55, 65, and 80 degrees, to the target normal and a target temperature of 1000C. In all cases reflected mean momentum and energy show a marked angular dependence, decreasing with increasing angle of reflection from the target normal at a given angle of incidence. The mean tangential velocity is close to the incident beam value over a range of reflection angles which contain most of the reflected particles. The speed ratio at all angles of reflection is appreciably larger than the incident beam value. The differential energy accommodation coefficient increases with increasingly glancing angles and decreases with increasing angle of reflection. (Author).
Author: Adolph George Stoll
Publisher:
ISBN:
Category :
Languages : en
Pages : 254
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Author:
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Category : Nuclear energy
Languages : en
Pages : 1142
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Author:
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Category : Aeronautics
Languages : en
Pages :
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Author: Max Kinslow
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ISBN:
Category : Artificial satellites
Languages : en
Pages : 32
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A report is made of an analytical study of free-molecule, hypervelocity air inlet configurations which might be used to supply gas for ion engines aboard satellites. The basic equations for the inlet are developed based upon gas-surface interactions. These equations are numerically solved for various gas-surface interaction parameters. Based upon these inlets, ion rocket performance is determined for various efficiencies. (Author).
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Category : Aeronautics
Languages : en
Pages : 1264
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Author:
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ISBN:
Category : Condensed matter
Languages : en
Pages : 436
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Author:
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ISBN:
Category : Chemistry
Languages : en
Pages : 536
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Author: Joseph M. Harrer
Publisher:
ISBN: 9780870790058
Category : Technology & Engineering
Languages : en
Pages : 1052
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