Accession Number : ADA305572

Title :   Plasma Driven Water Shock.

Descriptive Note : Technical rept. 24 Sep 91-31 Mar 94,

Corporate Author : MISSION RESEARCH CORP ALBUQUERQUE NM

Personal Author(s) : Hess, Gary R.

PDF Url : ADA305572

Report Date : 01 MAR 1996

Pagination or Media Count : 112

Abstract : This report describes the development and testing of the Phase II Plasma Driven Water Shock (PDWS ll) simulator as a continuation of the effort to develop a high energy density alternative to conventional high explosive (HE) water shock systems used for simulation of nuclear generated underwater shocks. The PDWS technique involves the rapid discharge of electrical energy, stored capacitively at high voltage, through a water plasma formed by electrical breakdown between fixed electrodes. The small volume of the plasma combined with extremely fast energy deposition results in a more nuclear like response than that obtained by the slower, more bulky HE energy release. Comparative experimental results have shown the necessity of rapid energy injection to achieve high coupling efficiency. There are strong implications based on these results for simulation using high explosives (HE) or numerical calculations that depend upon HE results. The fact that the coupling efficiency from the plasma to the water is strongly dependent upon the energy density for the microsecond time scales used here, implies that relationships developed for shock characteristic behavior from HE tests dependent upon available chemical energy or 'yield' may be extremely suspect when applied to nuclear generated phenomena with radically different behavior than conventional explosives.

Descriptors :   *SHOCK WAVES, *NUCLEAR EXPLOSION SIMULATION, *PLASMA DEVICES, COUPLING(INTERACTION), COMPUTATIONS, PLASMAS(PHYSICS), NUMERICAL ANALYSIS, EFFICIENCY, ENERGY TRANSFER, HIGH ENERGY, HIGH DENSITY, UNDERWATER EXPLOSIONS, BREAKDOWN(ELECTRONIC THRESHOLD), HIGH VOLTAGE, MICROSECOND TIME.

Subject Categories : Explosions

Distribution Statement : APPROVED FOR PUBLIC RELEASE