Development of 2m×2m size glass RPCs for INO

Simulation: Study of Flow of Gas in a Resistive Plate Chamber

“…The result indicates that, the transient and steady flow of gas could be easily done in the COMSOL package. [3]. As the motion of gas molecules is found to be in Laminar range, the partial pressure of gas component or radical, (a point source to form Gaussian distribution) can be calculated at any instance by combining diffusion and drift under small pressure gradient.…”

“…of India., will use RPC (Resistive Plate Chamber) as one of active component for construction of 50K ton magnetised Iron Calorimeter detector (ICAL) [1][2] [3]. The "coated glass gap" with a gap of 2mm created in between two 3mm thick float glass with four gas nozzles, and these glasses are coated with conductive paint on the outer surface, while the surfaces inside the gap are cleaned and not coated.…”

“…The contaminants like air, moisture, breakdown radicals of gas like HF, CF3 etc. lead to the deterioration of the detector lifetime and it performance [3] [4]. These contaminants are produced due to ionisation process or through leaks in the RPC or the tubes joints connecting the RPCs.…”

Numerical studies on effect of operating conditions and geometrical components on the timing response and efficiency of RPC

“…These two values are chosen arbitrarily to obtain the best match between the two curves. The mismatch of arrival (a) (b) Figure 7: Comparison of experimental and simulated results for the variation of (a) average signal arrival time and (b) time resolution of a glass RPC with the fraction of SF 6 present in the gas mixture (experimental data from [3], simulation results at E z = 45 kV/cm).…”

“…A straightforward approach based on the basic principles of electronic signal detection has been implemented to calculate the timing response in the process of simulating the induced current signal. The same simulation has been performed for computing the timing properties of a glass RPC for which experimental data are available [3] to compare with the numerical work. In this paper, the material property (bakelite or glass) has been used for calculating the electric field and weighting field within the RPC gas chamber which depends on the dielectric constant of the chosen material.…”