Properties of C2H2F4 Based Gas Mixture for Avalanche Mode Operation of Resistive Plate Chambers

Some properties of a 90% C2H2F4 gas mixture, used to operate resistive plate chambers in avalanche mode, are determined by comparing the experimental results with the prediction of simple analytical calculations. The fast charge distribution of the signal induced on the pick-up electrodes is reproduced by means of a Monte Carlo simulation of the avalanche development. In addition predictions for a gas mixture with poor content of C2H2F4 are given for comparison