National Bureau of Standards Handbook, Issue 64U.S. Government Printing Office, 1957 - Industrial safety |
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Page
... collector plate and adjacent guard plates___ 6 c . Contact potential difference between guard plates and collector electrodes _ _ 6 2.5 . Aperture - to - collector distance d . Externally imposed potential difference between collector ...
... collector plate and adjacent guard plates___ 6 c . Contact potential difference between guard plates and collector electrodes _ _ 6 2.5 . Aperture - to - collector distance d . Externally imposed potential difference between collector ...
Page 2
... plate H , with respect to the other plates , sweeps out the ionization produced in the air between the plates . The ionization is measured for a length , L , de- termined by the limiting lines of force to the edges of the collector , C ...
... plate H , with respect to the other plates , sweeps out the ionization produced in the air between the plates . The ionization is measured for a length , L , de- termined by the limiting lines of force to the edges of the collector , C ...
Page 3
... collector - field uniformity and because drafts may cause temperature gradients , the air temperature should be ... plate system . ( Re- moval of the wires or strips increases field dis- tortion . ) c . Increased ionization losses due to ...
... collector - field uniformity and because drafts may cause temperature gradients , the air temperature should be ... plate system . ( Re- moval of the wires or strips increases field dis- tortion . ) c . Increased ionization losses due to ...
Page 4
... collector electrode length and by assuring that the limiting lines of force ... plates . However , the dimensions of the electrode system for an air chamber ... plate system must be alined parallel with the X - ray beam , to avoid cosine ...
... collector electrode length and by assuring that the limiting lines of force ... plates . However , the dimensions of the electrode system for an air chamber ... plate system must be alined parallel with the X - ray beam , to avoid cosine ...
Page 6
... plate separation of 40 cm ( S , fig . 4 ) , with 2 cm ( s ) between adjacent guard wires in the same plane , with 3 ... collector plate and ad- jacent guard plates . For a parallel - plate chamber , these plates should be coplanar . If ...
... plate separation of 40 cm ( S , fig . 4 ) , with 2 cm ( s ) between adjacent guard wires in the same plane , with 3 ... collector plate and ad- jacent guard plates . For a parallel - plate chamber , these plates should be coplanar . If ...
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Common terms and phrases
0.1 percent added filter air absorption alinement attenuation beam diameter Bureau of Standards Cā calibration capacitance capacitor coefficient collecting potential collection region collector and guard collector electrode collector length collector plate computation constant potential X-ray contact potential difference Cryogenic Cu+1 curve cylindrical diaphragm aperture distance dose rate Electrical electrometer electron-produced ionization electronic equilibrium Engineering error field distortion filtration of approximately free-air chamber guard electrodes guard plates guard wires high-speed electrons high-voltage plate hole inherent filtration ionization chamber ionization current ionization density ionization loss ionization produced kv kv kv Loss of electron-produced mass of air material meter National Bureau parallel-plate chamber Physics plane of definition potential X-ray beams potentiometer principle of electronic radii Radio Propagation radius resistor saturation current scatter secondary instruments standard chamber Swedish chamber temperature tion total electron ionization tungsten alloy two-dimensional voltage divider voltage source water vapor wires or strips X-RAY TUBE ŃŃ
Popular passages
Page 1 - The unit of exposure dose of X- or gamma radiation is the roentgen (r). One roentgen is an exposure dose of X- or gamma radiation such that the associated corpuscular emission per 0.001293 g of air produces, in air, ions carrying 1 electrostatic unit of quantity of electricity of either sign.ā