The Design and Manufacture of Wedge and Strip Anodes

We describe the Wedge and Strip Anode (WSA), a two-dimensional position sensitive charge read-out system. Two new optimised WSA's have been developed, giving improved position resolution over previous WSA's for a given charge gain. We show that due to the effective absence of partition noise, WSA's outperform resistive disk anodes at all charge levels. We present measurements of the performance of these optimsed read-outs. Finally, we have designed and built a software controlled WSA manufacturing facility, which can produce any pattern of up to 400 × 500 mm2 with an absolute accuracy of ± 2.5μm.