Speaker
Description
The use of R134a-based gas mixture containing SF$_6$ for operating RPC is not recommended owing to its high global warming potential (GWP). The effective GWP of the standard gas mixture of R134a (95.2%), i-C$_4$H$_{10}$ (4.5%) and SF$_6$ (0.3%) is about 1300 which is well beyond the permissible limit (less than 150) set in order to reduce the greenhouse gas (GHG) emissions. This work presents experimental qualification of an eco-friendly, non-flammable, inexpensive gas mixture of Ar (5%), CO$_2$ (60%), and N$_2$ (35%) for operating Resistive Plate Chamber (RPC) in avalanche mode, proposed on the basis of a numerical work [1]. The performance of RPC using the proposed gas mixture has been investigated and compared to the available experimental data for the standard gas mixture to study its efficacy and limitation.
[1] J. Datta, S. Tripathy, N. Majumdar, and S. Mukhopadhyay, Journal of Instrumentation 16 (2021) P07012.
