Publication

Gas breakdown mitigation in satellite slip rings

Ivo Furno, Alan Howling, Paul Jeroen Laureis Martens, Fabio Avino
2019
Journal Articles

Abstract

Direct current (DC) gas breakdown is experimentally investigated for high-voltage circular conductors and insulators that reproduce the main features of a satellite slip ring. Breakdown voltages are measured in the pressure range 10

Official source

https://infoscience.epfl.ch/entities/publication/08ca02b6-5898-41a3-b94f-44ddb03662ad

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Ivo Furno, Alan Howling, Paul Jeroen Laureis Martens, Fabio Avino
2019
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/08ca02b6-5898-41a3-b94f-44ddb03662ad

About this result

Related concepts (22)

Electrical breakdown

In electronics, electrical breakdown or dielectric breakdown is a process that occurs when an electrically insulating material (a dielectric), subjected to a high enough voltage, suddenly becomes a conductor and current flows through it. All insulating materials undergo breakdown when the electric field caused by an applied voltage exceeds the material's dielectric strength. The voltage at which a given insulating object becomes conductive is called its breakdown voltage and, in addition to its dielectric strength, depends on its size and shape, and the location on the object at which the voltage is applied.

Direct current

Direct current (DC) is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a vacuum as in electron or ion beams. The electric current flows in a constant direction, distinguishing it from alternating current (AC). A term formerly used for this type of current was galvanic current.

Paschen's law

Paschen's law is an equation that gives the breakdown voltage, that is, the voltage necessary to start a discharge or electric arc, between two electrodes in a gas as a function of pressure and gap length. It is named after Friedrich Paschen who discovered it empirically in 1889. Paschen studied the breakdown voltage of various gases between parallel metal plates as the gas pressure and gap distance were varied: With a constant gap length, the voltage necessary to arc across the gap decreased as the pressure was reduced and then increased gradually, exceeding its original value.

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