Danny Boy Event, Project 1.6, Mass Distribution Measurements of Crater Ejecta and Dust, POR 1815 (WT) PDF Download
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Author: Landon K. Davis Publisher: ISBN: Category : Blast effect Languages : en Pages : 56
Book Description
The results of various previously reported investigations of the Danny Boy event are utilized to compute and compare the volumes of ejected material and volumes attributable to other crater-formation mechanisms. Imbalance of the volumetric contributions is attributed primarily to the uncertainty of the ejecta density in the lip region. Approximately 65 percent of the rock material dissociated by the explosion was permanently ejected from the crater; less than 2 percent of the ejected material was deposited beyond 3 crater radii from ground zero. Comparisons are made with high-explosive and nuclear detonations in desert alluvium. (Author).
Author: Landon K. Davis Publisher: ISBN: Category : Blast effect Languages : en Pages : 56
Book Description
The results of various previously reported investigations of the Danny Boy event are utilized to compute and compare the volumes of ejected material and volumes attributable to other crater-formation mechanisms. Imbalance of the volumetric contributions is attributed primarily to the uncertainty of the ejecta density in the lip region. Approximately 65 percent of the rock material dissociated by the explosion was permanently ejected from the crater; less than 2 percent of the ejected material was deposited beyond 3 crater radii from ground zero. Comparisons are made with high-explosive and nuclear detonations in desert alluvium. (Author).
Author: A. D. Rooke (Jr) Publisher: ISBN: Category : Languages : en Pages : 112
Book Description
An array of tarpaulins was placed in a concentric circular pattern about the ground zero of a nuclear device with an intended yield of 470 tons. The device was detonated at a depth of 33.5 meters in a basalt medium. After the shot, when the residual radioactivity permitted, samples of ejecta and dust thrown from the crater and deposited on the tarpaulins were recovered, weighed, and analyzed for particle size. The nearest samples to GZ were recovered at a radial distance of 94 meters and the most remote at 268 meters. From a total of 158 collector stations, 27 samples were recovered. Mass distribution per unit area and size distribution were tabulated and shown graphically as functions of radial distance from GZ. The amount of deposition was found to decrease sharply with distance; most of the deposition was from within 150 meters of GZ. Particle size similarly decreased with distance from GZ, the percentage of fines increasing rapidly beyond the 94-meter collector ring. Results of similar experiments are summarized and compared with Danny Boy data by means of dimensionless plots. (Author).
Author: Brooks D Anderson (II.) Publisher: ISBN: Category : Languages : en Pages : 40
Book Description
Particle size distributions of fallback and ejecta have been determined principally by mechanical sieving and weighing. However, as the size of nuclear craters produced in the experimental program increased, it became increasingly more expensive to continue this procedure, particularly since the reliability of the data is proportional to the fraction of total available material investigated. An alternate technique to sieving and weighing involves the selection and measurement of particles lying beneath points along a selected line of traverse. A pebble count technique originated by Wolman (1954) has been modified and given theoretical justification (Delesse Relation) for generating a cumulative curve interpretable as a size-weight distribution. Data gathered to date indicate the results obtained are comparable to sieving and weighing the same material. Application of the technique to the DANNY BOY, CABRIOLET, BUGGY and Pre-SCHOONER ALPHA, BRAVO and CHARLIE Crater ejecta indicates the method can be successfully applied to both nuclear and chemical explosive crater fall back and ejecta. (Author).
Author: Landon K. Davis
Author: Landon K. Davis
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Author: 
Author: Carl R. Gerber
Author: A. D. Rooke (Jr)
Author: Nicholas M. Short
Author: R. H. Carlson
Author: Joseph L. Spruill
Author: Brooks D Anderson (II.)
Author: