spark chamber

spark chamber
a device for detecting elementary particles, consisting of a series of charged plates separated by a gas so that the passage of a charged particle causes sparking between adjacent plates.
[1960-65]

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▪ radiation detector
      radiation detector (radiation measurement) useful for the investigation of subatomic particles (subatomic particle) in high-energy particle physics (physics). It consists of a series of thin metal plates parallel to each other, separated by small gaps, and enclosed in a container filled with neon or another inert gas. When a charged particle passes through the chamber, it ionizes (ionization) the gas along its path. If, in turn, a very high voltage or potential drop is applied as a brief pulse across alternate plates, sparks will be produced along the ionized trails left by the particles. The paths of ionization remain in the chamber for about a millionth of a second, a sufficient time interval for a logic circuit to identify whether the particles that have emerged are of interest and consequently whether the high voltage pulse should be sent to the plates so that the resultant spark pattern can be recorded for later analysis. The pattern of sparks can be recorded photographically, electronically, or acoustically.

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Universalium. 2010.

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Look at other dictionaries:

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  • spark chamber — noun an instrument that detects ionizing radiation from elementary particles • Syn: ↑spark counter • Hypernyms: ↑particle detector …   Useful english dictionary

  • spark chamber — noun Date: 1961 a device usually used to detect the path of a high energy particle that consists of a series of charged metal plates or wires separated by a gas (as neon) in which observable electric discharges follow the path of the particle …   New Collegiate Dictionary

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  • spark — 1. n. & v. n. 1 a fiery particle thrown off from a fire, or alight in ashes, or produced by a flint, match, etc. 2 (often foll. by of) a particle of a quality etc. (not a spark of life; a spark of interest). 3 Electr. a a light produced by a… …   Useful english dictionary

  • Spark — 1. n. & v. n. 1 a fiery particle thrown off from a fire, or alight in ashes, or produced by a flint, match, etc. 2 (often foll. by of) a particle of a quality etc. (not a spark of life; a spark of interest). 3 Electr. a a light produced by a… …   Useful english dictionary

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