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Measurements of differential non-linearity have been made, with a small multiwire proportional chamber, for two special cathode strip geometries. The results have been compared with that for conventional strip geometry, and with theoretical predictions. With the ratio of sampling node separation to anode, cathode separation at the exceptionally large value 2.4, a peak-to-peak differential non-linearity of 72% was observed for the conventional geometry. The first special geometry employed two intermediate strips between the readout strips. By using near optimum capacitive coupling between strips, a differential non-linearity of about 4% has been achieved at the same ratio 2.4. In the second special geometry, cathode strips with optimum depth zigzag shaped boundaries yielded an experimental differential non-linearity of about 7%.

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