Exploding foil

A minor but promising line of investigation concerns the use of plasmas preformed from thin foil targets, via the exploding-foil technique. In this scheme, a thin foil of material, usually plastic of few micron thickness, is exploded in the interaction with the ASE pedestal. The main pulse interacts then with the preproduced plasma enabling the onset of the LWF mechanism. The choice of the thickness and material of the target, as well as... 

Fig. 8.5. Optical density spots produced by the released energy of electrons accelerated in exploding foils plasma (see also [68])...

Exciton-phonon coupling, 42 Excursion time, 65 Exploding-foil technique, 152 External injection, 172... 

EFI = Exploding Foil Imitiator 130 EGDN = ethyleneglycol dinitrate 229 Einbasige Pulver = nitrocellulose gun powder 287... 

Similar in some respects to an Exploding BridgeWire Detonator, the Exploding Foil Initiator uses a high electrical current to vaporize a foil and accelerate a dielectric flyer down a short barrel (typically about 0.2 mm long). The kinetic energy of the flyer is sufficient to initiate high density secondary explosives such as HNS directly. Invented in 1965 by John Stroud of the Lawrence Livermore National Laboratory. 

P.V. Keller and J.R. Pennings Jr., Exploding foils—The production of plane shock waves and the acceleration of thin plates, in Exploding Wires (eds. W.G. Chase and H.K. Moore), Plenum Press, N.Y., pp. 263-277 (1962). 

Thin mylar or aluminum flyer plates were accelerated by a shock generated by an exploding foil. A Plexiglas moderator was placed adjacent to the foil and the flyer spalled off this plate. The technique was used so that low impact... 

Figure 26. Exploding foil apparatus and flyer assembly [46],...

The first mechanistic KDIE correlation of the thermal decomposition process with explosive sensitivity was accomplished with the thermally initiated nonsteady—state thermal explosion event. The HMX thermal explosion event has been discussed and represents an intermediate temperature/pressure regime between the less drastic combustion event and the high order steady—state detonation event. Mechanistic KDIE detonation investigations recently have been conducted and provide the first correlation between the thermochemical decomposition process and shock—induced detonation using an exploding foil driven flyer plate test. i ... 

Table VI. Exploding Foil Shock Detonation KDIE Values. Sample Fiver Plate Vel.(mm/usi Std Dev...

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