Accession Number : ADA266414


Title :   Numerical Modeling of the Temperature Gradients and Spectra of the Plasma Armature on Thunderbolt


Descriptive Note : Memorandum rept.


Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC


Personal Author(s) : Kepple, Paul C ; Clark, Robert W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a266414.pdf


Report Date : 14 Jun 1993


Pagination or Media Count : 39


Abstract : Numerical simulations of the spectra recorded on Thunderbolt shots 26 and 27 are presented. The calculations proceed via multifrequency radiation transport and are based on the assumptions that the plasma armature is cylindrically symmetric, the atomic constituents are homogeneously mixed and in pressure equilibrium, and the temperature gradient is specified. For the case of shot 27 the simulation is in excellent agreement with experiment and leads to a specific inference of a temperature gradient. For the case of shot 26 (where one capacitor bank fired early) the simulations indicate that the plasma armature for this shot did not satisfy some or all of the assumptions above. Since the aluminum absorption feature on shot 26 is too narrow relative to the B II and Cu I features there probably was a 'blob' of aluminum near the wall.


Descriptors :   *ELECTROMAGNETIC GUNS , MATHEMATICAL MODELS , COMPUTERIZED SIMULATION , SPECTRA , COPPER , PRESSURE , GRADIENTS , CAPACITORS , PLASMA DIAGNOSTICS , GUNS , ALUMINUM , TEMPERATURE GRADIENTS , RADIATION , GUN BARRELS


Subject Categories : Guns


Distribution Statement : APPROVED FOR PUBLIC RELEASE