Capacitive charge division in centroid finding cathode readouts in MWPCs

A technique is described in which the centroid of induced charge on cathode strips in a proportional chamber can be determined with reduced differential and integral nonlinearity, without increasing the number of readout channels. It is based on capacitive charge division from intermediate cathode strips to adjacent readout strips. It can be applied both to amplifier-per-channel systems and to global-position readout. Both types of readouts have been studied using this approach, which is easy to implement and does not require modification of the existing readout electronics.<>