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Diagram of a Slapper Detonator
A slapper detonator, also called exploding foil initiator (EFI), is a detonator developed by Lawrence Livermore National Laboratory, US Patent No. 4,788,913 (Filed 1971, Granted 1988). It is an improvement over the earlier exploding-bridgewire detonator. Instead of directly coupling the shock wave from the exploding wire (as the bridgewire does), the expanding plasma from an explosion of a metal foil drives another thin plastic or metal foil called a "flyer" or a "slapper" across a gap, and its high-velocity impact on an explosive (for example, PETN or hexanitrostilbene) then delivers the energy and shock needed to initiate a detonation. Normally all the slapper's kinetic energy is supplied by the heating (and hence expansion) of the plasma (the former foil) by the current passing through it, though constructions with a "back strap" to further drive the plasma forward by magnetic field also exist. This assembly is quite efficient; up to 30% of the electrical energy can be converted to the slapper's kinetic energy. The device's name is derived from the English word 'slap'.
The initial explosion is usually caused by explosive vaporization of a thin metal wire or strip, by driving several thousand amperes of electric current through it, usually from a capacitor charged to several thousand volts. The switching may be done by a spark gap or a krytron.
Usually the construction consists of an explosive booster pellet, against which a disk with a hole in the center is set. Over the other side of the disk, there is a layer of an insulating film, for example, Kapton or PET film, with a thin strip of metal (typically aluminum or gold) foil deposited on its outer side. A narrowed section of the metal then explosively vaporizes when a current pulse passes through it, which shears the mylar foil and the plasma ball pushes it through the hole, accelerating it to very high speed. The impact then detonates the explosive pellet.
Slapper detonators are frequently used in modern weapon designs and aerospace technology.
A slapperdetonator, also called exploding foil initiator (EFI), is a detonator developed by Lawrence Livermore National Laboratory, US Patent No. 4,788...
accidents with conventional electric detonators. Slapperdetonators are an improvement on EBW detonators. Slappers, instead of directly using the exploding...
A pencil detonator or time pencil is a time fuze designed to be connected to a detonator or short length of safety fuse. They are about the same size...
Look up slapper or släpper in Wiktionary, the free dictionary. Slapper may refer to: SlapperdetonatorSlapper, a metalworking hand tool Slapper, a character...
are triggered using exploding bridgewire detonators, which were themselves later succeeded by slapperdetonators.[citation needed] Classical blasting caps...
are best known for their use in igniting exploding-bridgewire and slapperdetonators in nuclear weapons, their original application, either directly (sprytrons...
(reservoirs) are used as energy sources for the exploding-bridgewire detonators or slapperdetonators in nuclear weapons and other specialty weapons. Experimental...
modulators to feed the high-power pulses into the magnetrons, for use with slapperdetonators, or for triggering a Marx generator. Crossatron Thyratron Krytron...
(reservoir) are used as energy sources for the exploding-bridgewire detonators or slapperdetonators in nuclear weapons and other specialty weapons. Experimental...
wave, Oblique shock Skin effect Skip zone Sky brightness Skywave Slapperdetonator Small Tight Aspect Ratio Tokamak Solar cycle, Cosmic ray flux Solar...
that looks like was washed up which they didn't hear while disarming a detonator. As Ray turns them down because of what happened to the smudge, Danger...
the released Waheed embraces his father in the street, Rapp pulls out a detonator and blows Saeed and Waheed and twelve of Saeed's bodyguards to pieces...
Jesse and Charlie out and she plans to use an explosive without a remote detonator. Michael realizes that Madeline plans to sacrifice herself, but Madeline...
of their son, Trunks. She used Dr. Gero's stolen blueprints to build a detonator to destroy the Androids, but Krillin broke it after realizing his feelings...
Downstairs, the Navy SEAL pulls out a C4 charge and slaps it behind a set of pipes. He quickly sets up the detonator and then hides in the back and waits for the...
Pekanbaru, Riau, in February 2003 and securing additional materials such as detonators involved Noordin, Azhari, Rais, Toni Togar, and a new team member, Masrizal...
Downstairs, the Navy SEAL pulls out a C4 charge and slaps it behind a set of pipes. He quickly sets up the detonator and then hides in the back and waits for the...
that Bungo had bombs strapped around his jacket. He takes out the bomb's detonator in one more desperate attempt to kill the task force along with himself...
that a nuclear bomb is implanted somewhere inside the academy and the detonator is hidden somewhere in his body. Left with no other choice, Rihito ends...
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