Development and Characterization of 6-gap Bakelite Multi-gap Resistive Plate Chamber

TL;DR

This paper reports the development and characterization of a 6-gap Bakelite MRPC, demonstrating its potential for high-resolution, cost-effective particle detection suitable for applications like Positron Emission Tomography.

Contribution

It introduces a novel 6-gap Bakelite MRPC design and evaluates its performance, expanding the material options for MRPC detectors beyond glass.

Findings

Achieved good efficiency and time resolution with Bakelite electrodes.

Demonstrated potential for PET imaging applications.

Developed a prototype suitable for Time-Of-Flight measurements.

Abstract

The Multi-gap Resistive Plate Chamber (MRPC) is an advanced form of Resistive Plate Chamber (RPC) detector where the gas gap is divided into sub-gaps. MRPCs are known for their good time resolution and detection efficiency for charged particles. They have found suitable applications in several high energy physics experiments like ALICE in LHC, CERN, Geneva, Switzerland, and STAR in RHIC, BNL, USA. As they have very good time resolution and are of low cost, they can be a suitable replacement for very expensive scintillators used in Positron Emission Tomography Imaging. The MRPCs that are being used nowadays are developed with glass electrodes. We have made an attempt to develop a 6-gap MRPC using bakelite electrodes. The outer electrodes are of dimensions 15 cm $\times$ 15 cm $\times$ 0.3 cm and the inner electrodes are of dimension 14 cm $\times$ 14 cm $\times$ 0.05 cm. The glossy finished electrode surfaces have not been treated with any oil like linseed, silicone for smoothness. The performance of the detector has been studied measuring the efficiency, noise rate and time resolution with cosmic rays. This effort is towards the development of a prototype for Positron Emission Tomography with the Time-Of-Flight technique using MRPCs. Details of the development procedure and performance studies have been presented here.