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COUNTER, Eng. law. The name of an ancient prison in the city of London, which has now been demolished.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
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The gaseous proportional counter with a threshold 5 eV is a very perspective tool to study neutrino scattering on electrons and nuclei at small recoil energies.
In total, 15 systems (11 different instruments from six manufacturers) were tested: 11 benchtop instruments (seven Si-PIN, one SiLi and three proportional counters) and four less expensive, portable machines (all Si-PIN).
Besides the limitations of increased sample heating, large focused electron beams from higher beam currents, and beam current stability, there are processes within the proportional counter and detector electronics limiting the count rate.
Its Large Area Xenon Proportional Counters (LAXPC) have the largest collecting area of any X-ray instrument ever built, and it's currently the only one capable of studying X-ray fluctuations over millisecond time scales.
There are different ways for the measurement of radioactivity radiations such as Gas-Filled Detectors, Geiger Mueller counters, Proportional counters, Electronic dosimeters, Chemical Dosimeters, High- purity Germanium (HPGe) detectors, Cadmium Zinc Telluride (CZT) crystal detector, Organic and Inorganic Scintillators, Calorimetry, Cerenkov Detectors, slow- neutron detectors and Bubble Detectors.
"The solid-state thermal neutron detector provides improvements in sensitivity, size, weight, power consumption, operator safety, transportability and cost compared to other available detectors such as gas proportional counters and scintillation counters," McGinnis said.
Two of the devices were position-sensitive proportional counters. One of these was damaged in 1991 by overexposure to the sun.