arXiv subjects

S. Thoi Thoi

Publications and source records attributed to S. Thoi Thoi.

3 recordsLinked to original sources

arXiv2026

Design and Development of Portable RPC-Based Cosmic Muon Tracker

Primary cosmic rays when interact with our atmosphere, produce a cascade of lighter secondary particles namely pion, kaon, neutrons, muons, electrons, positrons and neutrinos. Muons are one of the most abundant and easily detectable particles at the ground surface using a large variety of particle detectors. Resistive Plate Chambers (RPCs) of 2m x 2m in dimension were developed to be used in large scale as the active detector elements in the Iron Calorimeter (ICAL) which was planned to be built by the India-based Neutrino Observatory (INO). As a spin-off of this work, a portable stack of eight, one square foot RPC detectors is developed named as Cosmic Muon Tracker (CMT). It could be used to conduct small-scale particle detector experiments as well as training Students. We will discuss design, integration, characterisation and some of the applications of this detector in this paper.

hep-ex↗

arXiv2025

Test-Jig for production testing of RPC-DAQ modules in INO-ICAL Experiment

The INO-ICAL experiment consist of 28,800 RPCs each equipped with a Front-End FPGA-based Data Acquisition (RPC-DAQ) module for acquiring detector signals. Due to the large number of RPC-DAQs are required, an automated test system is essential. RPC-DAQ Test-Jig is an FPGA module designed to generate standard test inputs to the RPC-DAQ supporting complete functionality testing. The RPC-DAQ has multiple functions such as strip hit latching, count rate monitoring, pulse stretching, trigger generation, TDC data collection, and Ethernet communication. To effectively test each of these logics the Test-Jig uses various test patterns allowing users to verify and debug RPC-DAQ modules at a faster rate. When generating a predefined event with known data the Test-Jig architecture generates data pattern similar to that of the detector and also verifies the received data from the RPC-DAQ simultaneously. This testing methodology helps in understanding the functionalities of the RPC-DAQ logic at various conditions. The developed Test-Jig and along with its test methodologies reduces the debugging time of RPC-DAQs. This Paper discuss the architecture of the Test-Jig and some of its test methodologies in detail.

physics.ins-det↗

arXiv2025

NIOS II Soft-Core Processor and Ethernet Controller Solution for RPC-DAQ in INO ICAL

This paper introduces a high-performance Soft-Core Processor based data acquisition system designed for handling Resistive Plate Chambers (RPCs). The DAQ consist of FPGA-based hardware equipped with Soft-Core Processor and embedded hardwired Ethernet controllers named RPC-DAQ, offering a versatile and fast network-enabled data acquisition solution. A soft processor, NIOS, is instantiated within an Intel Cyclone IV FPGA, overseeing control, communication, and data transfer with remote processing units. These integrated RPC-DAQ units, in substantial numbers, connect to a limited set of high-end processing units via LAN switches. This paper provides a detailed account of the software implementation scheme for the NIOS processor in the RPC-DAQ system. A remarkable 28,800 RPC-DAQ units will be deployed in proximity to the RPCs, serving the proposed INO-ICAL experiment in Theni-Madurai, Tamil Nadu. The network-enabled RPC-DAQ units controlled by the soft processor offloads FPGA tasks including event data acquisition, periodic health monitoring of RPCs, command interfaces, high voltage control, and data transfer to back-end data concentrators. Communication and data transfer are executed efficiently via TCP and UDP protocols over a 100 Mbps Ethernet interface. This system provides innovative solutions to improve data acquisition and control in large-scale scientific experiments.

physics.ins-det↗