A simple 'vernier' method for improving the accuracy of coordinate readout in large wire chambers

A method is proposed to improve position accuracy in large wire chambers. A localization of an avalanche is obtained simply by printing a series of double wedges on a narrow cathode strip parallel to the anode wire of a wire chamber. This method seems to be well adapted as a 'vernier' technique: a gross method provides the address of a wedge subsection which then gives, with a greater accuracy, the position within the subsection. (orig.)