Speaker
Description
CO2 is widely used as the quenching agent in detectors used in high-energy physics due to its good features of stabilizing the electrons avalanche development. Also, the life time is two orders of magnitude higher than for mixtures with an organic quenching agent. In detectors used for precise measurements of particle tracks (i.e. vertex detectors)with an accuracy of less than 50 µm, CO2 is increasingly used. This gas is characterized by a large active cross-section to inelastic electron scattering, which causes that the characteristic energy of electrons and their drift velocity are small, which improves the spatial detector resolution. Other important features of CO2, especially important in large particle detection systems is its non-flammability and low price. This mixture was and still is intensively examined to fully understand the physical processes occurring in them. In previous works a model of physical phenomena in detector was created. On the basic of this model an analytical formulae describing the gas amplification were obtained. These formulae contained two or three constants characteristic for the mixture to be determined experimentally. Nowadays, we use Monte Carlo algorithms to study the phenomena occurring in gas detectors. In this work we want to use both analytical formulae for gas amplification as well as the Monte Carlo methods for the analysis of the measured data.
