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Wire chamber
A multi-wire proportional chamber is a type of proportional counter that detects charged particles and photons and can give positional information on their trajectory,〔F. Sauli (1977), - ( Principles of operation of multiwire proportional and drift chambers ) Retrieved 2012-02-25〕 by tracking the trails of gaseous ionization.〔 was located via Dr. C.N. Booth (PHY304 Particle Physics Sheffield University )〕
== Description ==
The multi-wire chamber uses an array of wires at high voltage (anode), which run through a chamber with conductive walls held at ground potential (cathode). The chamber is filled with carefully chosen gas, such as an argon/methane mix, such that any ionizing particle that passes through the tube will ionize surrounding gaseous atoms. The resulting ions and electrons are accelerated by the electric field around the wire, causing a localised cascade of ionization known as a Townsend avalanche. This collects on the nearest wire and results in a charge proportional to the ionisation effect of the detected particle. By computing pulses from all the wires, the particle trajectory can be found.
Adaptions of this basic design are the ''thin gap, resistive plate'' and ''drift'' chambers. The drift chamber is also sub-divided into ranges of specific use in the chamber designs known as time projection, microstrip gas, and those types of detectors that use silicon.〔I. Kisel - () Retrieved 2012-02-28〕〔(University of Manchester - HEP ) - (101 ) Retrieved 2012-02-28〕
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