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Resistive Plate Chambers (RPCs) are multipurpose ionizing gas detectors broadly used in Particle Physics research because of the outstanding time resolution they offer at a very affordable price, their robustness and their easy manufacture. However, to extend their use to a broader range of applications, some properties, specially the counting rate capability, need to be improved. The straightforward way to increase the rate capability is to develop new electrodes with resistivities in the range of 10 7 10 8 .m offering, besides a “resistive” character, conductivity high enough for allowing faster charge depletion in the chamber. In this work, we have carried out electrical measurements on several materials that are currently used or, according to their conductivity values, are good candidates to be used as resistive plates in high rate RPCs. We have analysed their behaviour in order to identify and to better understand their conduction mechanisms and to determine the nature of the degradation processes.

Ageing and conductivity of electrodes of high rate RPCs from an ion conductivity approach