Document Type : Original Article
Authors
1 Faculty of Mechanical Engineering, Sahand University of Technology, Tabriz, Iran
2 Departments of Physics, Sahand University of Technology, Tabriz, Iran
Abstract
Nowadays, the simultaneous use of a large number of resistive plate chambers has become widespread in advanced physics experiments. One of the significant challenges with this type of detector is the use of gas. The collision of energetic particles with gas molecules leads to the ionization of the gas molecules, resulting in reactions that eventually contaminate the gas. To avoid degrading the performance of the detector, the contaminated gas must be replaced. Economic constraints and environmental considerations make optimization of the gas system inevitable. In this research, we use computational fluid dynamics tools to study the gas flow regime inside a single gap detector. Our study shows that both diffusion and advection processes are effective in gas replacement in the chamber, but one dominates over the other within a specific range of the chamber. Based on the simulation results for single-gap detectors and considering the geometry of the multi-gap detectors, we can conclude that in the multi-gap detectors, the diffusion process plays the main role in the gas replacement. The most effective measure to reduce the gas replacement time in multi-gap detectors is to fill and eliminate the empty and unused spaces in the chamber.
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