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A Study Of Current Noise In Cokes, Carbons, And Graphites, Robert J. Lanter
A Study Of Current Noise In Cokes, Carbons, And Graphites, Robert J. Lanter
Physics & Astronomy ETDs
This study shows that current noise occurs when there is a deviation of Ohm's Law, i.e., when the applied voltage and resultant current are no longer proportional. Since most, and perhaps all, cases of occurrence of frequency and current dependent noise are associated with non-linear devices, e.g., semiconductors, diodes, vacuum tubes, insulators near breakdown, it seems reasonable to seek a mechanism involving non-linearity as an important feature. Even though it may not be justifiable to seek a single mechanism to explain all of the occurrences of current noise, nevertheless, the fact that in cases studied and discussed herein …
A Cloud Chamber Study Of Penetrating Showers In Aluminum, Copper And Lead, James Francis Kenney
A Cloud Chamber Study Of Penetrating Showers In Aluminum, Copper And Lead, James Francis Kenney
Physics & Astronomy ETDs
In recent years, much work has been done in the investigation of high-energy nuclear collisions in various materials. The purpose of these investigations is to gain a better understanding of nucleon-meson-nucleon interactions at high energies. Laboratory accelerating devices are capable at the present time of attaining energies which are still very low in comparison to the upper limit of the cosmic radiation energy spectrum. As a result, these investigations are best carried out by using the very hard component of the cosmic radition as the primary particle of the collision.
A Pulse Length Analyzer, Paul Scheie
A Pulse Length Analyzer, Paul Scheie
Physics & Astronomy ETDs
For experiments involving small scintillators and for experiments involving scintillator telescopes, the circuitry may closely resemble that used with geiger counters. However, if it is desired to make use of the variation in the signal amplitude in a large scintillator, some means must be found to deal with a wide range of amplitudes. The scintillator employed in the experiment to which this work relates is a tank 10 feet in diameter that contains 300 gallons of activated toluene; light of the scintillations is collected by a 16 inch photo-multiplier tube that is located on top of the tank.
A Chemical Ozone Measuring Radio Sonde, Alan W. Peterson
A Chemical Ozone Measuring Radio Sonde, Alan W. Peterson
Physics & Astronomy ETDs
The Vertical distribution of atmospheric ozone has been determined spectroscopically either from surface observations or from balloon-borne spectrographs sent aloft. These spectrographic techniques have several disadvantages. Surface observations of the "Umkehr Effect" give only a rough distribution, four or five points for the entire atmosphere.