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The exploding-bridgewire detonator (EBW, also known as exploding wire detonator) is a type of detonator used to initiate the detonation reaction in explosive materials, similar to a blasting cap because it is fired using an electric current. EBWs use a different physical mechanism than blasting caps, using more electricity delivered much more ...
A detonator is a device used to make an explosive or explosive device explode. [1] Detonators come in a variety of types, depending on how they are initiated (chemically, mechanically, or electrically) and details of their inner working, which often involve several stages. Types of detonators include non-electric and electric.
It is the central multi-purpose component of a modular system of detonating cords, pyrotechnics and various other explosive charges with many different uses. [1] The ignition charge of the device is a blend of zirconium, potassium perchlorate, Viton B and graphite, often abbreviated as ZPP. [2] Uses of the device include:
EWM has found its most common use as a detonator, named the exploding-bridgewire detonator, for nuclear bombs. Bridgewire detonators are advantageous over chemical fuzes as the explosion is consistent and occurs only a few microseconds after the current is applied, with variation of only a few tens of nanoseconds from detonator to detonator. [7]
A simple example is the common industrial detonator, where a very small amount of a sensitive explosive detonates, causing the less sensitive main charge of the detonator to detonate. It may involve additional steps where successively less sensitive compounds trigger a detonation wave in each other, with stages including various types of ...
The final design used 1 pound (450 g) of plastic explosive, mixed with a 1 ⁄ 4 pound (110 g) of thermite and a small amount of diesel oil [2] and steel filings. [3] Inside the mass was inserted a two-ounce (60 g) dry guncotton booster, plus a detonator attached to a thirty seconds fuse.
Nonel shock tubes (pink, red, orange, yellow) with Orica surface delay connector (blue) in use. Nonel is a shock tube detonator designed to initiate explosions, generally for the purpose of demolition of buildings and for use in the blasting of rock in mines and quarries.
(A) Slapper detonator's pellet or flyer impacts a wider area of surface on the explosive output charge, and even though energy is lost to the sides of the area impacted, a cone of explosive is efficiently compressed. (B) EBW detonators only initiate a single point, and energy is lost in all directions, making the energy transfer less efficient.