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An electric arc between two nails. An electric arc (or arc discharge) is an electrical breakdown of a gas that produces a prolonged electrical discharge. The current through a normally nonconductive medium such as air produces a plasma, which may produce visible light. An arc discharge is initiated either by thermionic emission or by field ...
As the gap was reduced further, the voltage required to cause an arc began to rise and again exceeded its original value. For a given gas, the voltage is a function only of the product of the pressure and gap length. [2] [3] The curve he found of voltage versus the pressure-gap length product (right) is called Paschen's curve. He found an ...
An arc flash is the light and heat produced from an electric arc supplied with sufficient electrical energy to cause substantial damage, harm, fire, or injury. Electrical arcs experience negative incremental resistance , which causes the electrical resistance to decrease as the arc temperature increases.
The thermionic vacuum arc (TVA) is a new type of plasma source, which generates a plasma containing ions with a directed energy. TVA discharges can be ignited in high-vacuum conditions between a heated cathode (electron gun) and an anode (tungsten crucible) containing the material.
Striations or string-like structures [67] are seen in many plasmas, like the plasma ball, the aurora, [68] lightning, [69] electric arcs, solar flares, [70] and supernova remnants. [71] They are sometimes associated with larger current densities, and the interaction with the magnetic field can form a magnetic rope structure. [72] (See also ...
The space charge created by the electron avalanches gives rise to an additional electric field, causing the ionized region to grow at its ends, forming a finger-like discharge called a streamer. Streamers are transient (exist only for a short time) and filamentary, which makes them different from corona discharges. They are used in applications ...
Articles relating to electric arcs, electrical breakdowns of a gas that produce a prolonged electrical discharge. The current through a normally nonconductive medium such as air produces a plasma ; the plasma may produce visible light .
A high energy pulsed laser can be used to produce an electric spark. Laser induced breakdown spectroscopy (LIBS) is a type of atomic emission spectroscopy that uses a high pulse energy laser to excite atoms in a sample. LIBS has also been called laser spark spectroscopy (LSS). [13] Electric sparks can also be used to create ions for mass ...