Accession Number : ADA308663

Title :   Response of Energetic Solids to Heat and Shock Pulses.

Descriptive Note : Final progress rept. 1 Jan 93-31 Mar 96,

Corporate Author : ILLINOIS UNIV AT URBANA

Personal Author(s) : Dlott, Dana D.

PDF Url : ADA308663

Report Date : FEB 1996

Pagination or Media Count : 6

Abstract : The problem is to develop experimental methods for studying the first events in initiation of an energetic material by a shock wave, to develop a detailed understanding of how initiation occurs. Using advanced laser systems in our laboratory, we have developed techniques to reproducibly generate microshock waves in energetic materials. We have developed new techniques to probe the behavior of materials and molecules during the shock process. In order to obtain the desired high time resolution of picoseconds, it is necessary in addition to having a laser which reproduces a picosecond pulse, to engineer extremely small, suboptical wavelength energetic material structures. We have succeeded in doing this and have obtained data on technologically significant energetic materials TATB, RDX, PETN and NTO. The data obtained in our laser shock experiments has time resolution several orders of magnitude faster than the present state of the art, which is needed to understand the initial steps in initiation. In a parallel development, we have used picosecond mid-infrared pulses to investigate molecular energy transfer in nitromethane. These experiments provide insight into the transfer and dissipation of excess energy, such as that produced by the passage of a shock wave, in high explosives.

Descriptors :   *SHOCK WAVES, *ENERGETIC PROPERTIES, *HIGH EXPLOSIVES, ENERGY TRANSFER, LASERS, RDX, INTERMEDIATE INFRARED RADIATION, NITROMETHANE, EXPLOSIVES INITIATORS, PETN.

Subject Categories : Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE