Abstract

A study was made of the accuracy with which the spark in an argon-filled triggered multiwire spark counter used in conjunction with neon lamps, defines the position of the trajectory of the triggering particle at a given level. For a single counter, it was found that the distribution of the separation between the spark and the trajectory is given by the sum of two Gaussians having relative intensities of 0.95 and 0.05 and standard deviations which increase with increasing delay between the traversal of the particle and the application of the h.t. pulse. The standard deviation of the major group was found to be 0.48, 0.55 and 0.81 mm for delays of 1, 2 and 7 microseconds, respectively. In addition to the above distributions large deviations were also observed which are explained in terms of photon-induced sparks.

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