The Properties of Some New Types of Counters

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Abstract
It is generally assumed that it is essential to use a cylinder of circular section as the cathode if a good counter of the point or wire type is to be made. Investigation of various geometrical forms of cathode with a wire as anode shows that counters may be made in a large variety of shapes and yet operate satisfactorily. Thus a large rectangular vessel with a wire placed symmetrically within the volume or mounted close to one wall has been found to operate as a self‐quenched counter. The use of such shapes is shown to result in improved performance in several important respects, e.g., reduced operating voltages, shorter dead‐times. By the use of several wires in the same vessel, coincidence arrangements are made easily possible. This can be applied successfully to the construction of a counter which has a reduced natural counting rate but still presents a large solid angle to an external source. Various other applications are considered.
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