Accession Number : ADA261327


Title :   Shock-Free Acceleration of Laser Driven Targets


Descriptive Note : Interim rept.,


Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC


Personal Author(s) : Emery, Mark H ; Gardner, John H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a261327.pdf


Report Date : 10 Dec 1992


Pagination or Media Count : 15


Abstract : The ability of recently developed laser smoothing techniques to produce uniform ablation pressures is strongly contingent on the degree of thermal smoothing. Thermal smoothing is not effective at reducing residual laser nonuniformities during the start up phase of a shaped, reactor-like laser pulse. The impact of the first shock can be diminished by adiabatically compressing the target with a temporally long, slowly rising laser pulse. This Memorandum Report discusses an elastic-plastic laser-matter-interaction model and shows that a shock-free, induced spatial incoherence-smoothed laser pulse can accelerate a target to nearly the conditions required for uniform implosion.


Descriptors :   *PULSED LASERS , *IMPACT SHOCK , *LASER TARGET INTERACTIONS , ABLATION , IMPACT , LASERS , RESIDUALS , PRESSURE , ADIABATIC CONDITIONS , UNIFORMS , PLASTICS , SHOCK , PULSES , PHASE , TARGETS , ACCELERATION


Subject Categories : Directed Energy Weapons


Distribution Statement : APPROVED FOR PUBLIC RELEASE