# Measurement of azimuthal dependent muon flux by 2\,m\,$\times$\,2\,m RPC stack at IICHEP-Madurai

## TL;DR

This study measures the azimuthal dependence of muon flux using a 2m x 2m RPC stack at Madurai, comparing experimental data with Monte Carlo simulations to evaluate detector performance and muon flux variations.

## Contribution

It provides the first detailed measurement of azimuthal muon flux dependence at Madurai using a large RPC setup, validating simulation models and assessing detector stability.

## Key findings

- Muon flux varies with azimuthal angle at Madurai.
- Experimental results agree with CORSIKA and HONDA simulations.
- RPCs demonstrate stable performance over long-term operation.

## Abstract

The proposed 50 \,kton\, INO-ICAL experiment is an upcoming underground high energy physics experiment planned to be commissioned at Bodi hills near Theni, India ($9^{\circ}57'N$, $77^{\circ}16'E$) to study various properties of neutrino oscillations using atmospheric neutrinos produced by extensive air shower phenomenon. The resistive plate chamber has been chosen as the active detector element for the proposed INO-ICAL. An experimental setup consisting a stack of 12 layers of glass resistive plate chambers each with a size of $\sim$2\,m$\times$2\,m has been built at IICHEP, Madurai to study the performance and long-term stability of the resistive plate chambers(RPCs) commercially produced in large quantities by the Indian industries as well as its electronics for the front-end and subsequent signal processing. In this study, the azimuthal dependence of muon flux at various zenith angles at Madurai (9$^{\circ}$56'N, 78$^{\circ}$00'E and at an altitude of 160\,m above mean sea level) has been presented along with the comparison of Monte Carlo from CORSIKA and HONDA predictions.