​​​​RP EBW Detonator​. P/N ​. The RP explosive is contained in a ” thick stainless steel case which is crimped onto the plastic head. OPEN ACCESS. A view on the functioning mechanism of EBW detonators -part 1: electrical characterisation. To cite this article: E A Lee et al J. Phys.: Conf. Exploding Bridgewire (EBW) Detonators are in widespread use and have proven reliability and performance characteristics. Since their invention there have.

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EBWs have found uses outside nuclear weapons, such as the Titan IV[5] safety conscious applications where stray electrical currents might detonate normal blasting caps, and applications requiring very precise timing for multiple point commercial blasting in mines or quarries.

EBWs use a different physical mechanism than blasting caps, using more electricity delivered much more rapidly, and explode in a much more precise timing vetonator the electric current is applied, by the process of exploding wire method. Since their invention there have been numerous studies to identify the mechanism by which the dteonator bridgewire initiates the explosive.

Detonatir from ” https: This is achieved via conventional explosives placed uniformly around the pit. Then an electric arc forms in the metal vapor, leading to drop of electrical resistance and sharp growth of the current, quick further heating of the ionized metal vapor, and formation of a shock wave. A very rough approximation for the capacitor is a rating of 5 kilovolts and 1 microfarad, and the peak current ranges between and amperes.

A low energy density capacitor equivalent to a detonattor generator would be roughly the size of a soda can. The extremely short rise times are usually achieved by discharging a low- inductancehigh-capacitance, high-voltage capacitor e.


This page was last edited on 31 Octoberat detonxtor If the current rise rate is lower, the bridge may burn, perhaps causing deflagration of the PETN pellet, but it will not cause detonation. By continuing to use this site you agree to our use of cookies. The heating process typically takes milliseconds to tens of milliseconds to complete and initiate detonation in the primary explosive.

Detonators Nuclear weapon design. The exploding-bridgewire detonator EBWalso known as exploding wire detonator is a type of detonator used to initiate the detonation reaction in explosive materialssimilar to a blasting cap because it is fired using an electric current.

Any further distribution of this work must maintain attribution to the author s and the title of the work, journal citation and DOI. Detonators without such booster are called initial pressing detonators IP detonators.

Exploding-bridgewire detonator

This site uses cookies. Consequently, the detonators must have very precise timing. However, there is still not a universally accepted mechanism. Buy this article in print. The heating rate is high enough that the liquid metal has no time to flow away, and heats further until it vaporizes. Since explosives detonate at typically 7—8 kilometers per second, or 7—8 meters per millisecond, a 1 millisecond delay in detonation from one side of a nuclear weapon to the other would be longer than the time the detonation would take to cross the weapon.

Content from this work may be used under the terms of the Creative Commons Attribution 3. Low- impedance capacitors and low-impedance coaxial cables are required to achieve the necessary current rise rate.


The precise timing of EBWs is achieved by the detonator using direct physical effects of the vaporized bridgewire to initiate detonation in the detonator’s booster charge.

E A Lee et al J. This is sufficiently precise for very low tolerance applications such as nuclear weapon explosive lenses.

The larger round objects with two wires coming out parallel to the surface are diagnostic equipment. Views Read Edit View history.

The flux compression generator is one alternative to capacitors.

RP EBW Detonator

To find out more, see our Privacy and Cookies policy. However, they require a bulky power source for the current surges required. Conventional blasting caps use electricity to heat a bridge wire rather than vaporize it, and that heating then causes the primary explosive to detonate. Modern exploding-bridgewire detonators arranged in a tray. From Wikipedia, the free encyclopedia. Imprecise contact between the bridgewire and the primary explosive changes how quickly the explosive is heated up, and minor electrical variations in the wire or leads will change how quickly it heats up as well.

During initiation, the wire heats with the passing current until melting point is reached. The results of the experimental work will be presented, together with the implications for the initiation mechanism of PETN in an exploding bridgewire detonator.

In degonator fission bomb, the same or similar circuit is used for powering the neutron triggerthe initial source of fission neutrons. The slapper detonator is a more recent development along similar lines.