Raether limit
Template:Short description The Raether limit is the physical limiting value of the multiplication factor (Template:Mvar) or gas gain in an ionization avalanche process (Townsend avalanche).
Even though, theoretically, it seems as if Template:Mvar can increase without limit (exponentially), physically, it is limited to about M < 108Script error: No such module "Check for unknown parameters". or αx < 20Script error: No such module "Check for unknown parameters". (where Template:Mvar is the first Townsend coefficient and Template:Mvar is the length of the path of ionization, starting from the point of the primary ionization).
Heinz Raether postulated that this was due to the effect of the space charge on the electric field.[1]
The multiplication factor or gas gain is of fundamental importance for the operation of the proportional counter and Geiger counter ionizing radiation detectors.
Sources
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- ↑ Script error: No such module "citation/CS1".
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- The Mechanism of the Electric Spark, Leonard Benedict Loeb, John M. Meek. Stanford University Press, 1941
- High Voltage Engineering, M S Naidu, V Kamarju. Tata McGraw-Hill Education, 2009