Resistive Plate Chambers (RPCs) are fast gaseous detectors with high spatial and temporal resolution. Multigap Resistive Plate Chambers (MRPCs) were introduced later to improve the time resolution and they have been used as time-of-flight (TOF) detectors both in HEP and in medicine (PET). The basic idea of an RPC is the same as a parallel plate capacitor with the novelty of the use of resistive materials as electrodes that allows for continuous operation.

Due to the electric field, the ions travel towards the cathode and the electrons towards the anode, inducing signals on the pickup electrodes. The moving electrons are also subject to an avalanche process, which amplifies the signals. Ultimately, the acquired data provides information such as time-of-flight and position telling us where and when an event occurred.

By operating the MRPC in the streamer mode, there is no need for an amplifier as the signals are sufficiently strong. This mode avoids complicated electronic amplification at the cost of operating at reduced rates. The main goal of our R&D is to design and build MRPCs to improve their measurement capabilities. In this work we present the results of the total charge deposited in a 20 gap MRPC with 2 different gap sizes using cosmic rays.