Design and Development of Gas Mixing Unit for Gas Electron Multiplier (GEM) Chamber

Gaseous detectors are the important components in each High Energy Physics (HEP) Experiment [1]. The operation of such detectors depends upon the mixture of various gases such as Ar, CO\(_2\), CF\(_4\), etc. However, the purity and the appropriate mixture of these gases is always the key component and has a direct impact on various properties of the detectors like gain, spatial, timing, and energy resolutions. The present work describes the design and construction of flexible and cost-effective Gas Mixing Unit (GMU) which is very useful for providing the appropriate mixture to various gaseous detectors like drift tubes (DTs), Gas Electron Multipliers (GEMs), Resistive Plate Chambers (RPCs), etc. We also present some preliminary results to demonstrate its stability with the changes in ambient conditions. The results were obtained by using this newly developed GMU with GEM 10 cm \(\times \) 10 cm as a test detector.