arXiv subjects

D. Ahmadi

Publications and source records attributed to D. Ahmadi.

4 recordsLinked to original sources

arXiv2026

Sealed, Lightweight gRPC-Based Muon Telescopes for Muography Applications

Portable muon detection systems are increasingly in demand for muography applications in environments requiring flexible installation and transportability. We present the ongoing development and implementation of portable muon tracking systems based on glass Resistive Plate Chambers (gRPCs). The work addresses the fabrication and assembly of compact, position-sensitive RPC detectors, along with their performance when operated with a standard gas mixture and coupled to external front-end electronics and a scalable multi-channel data-acquisition system. The system design prioritizes modular construction, mechanical robustness, operational safety, autonomous functionality, and cost-effectiveness. Measurements with atmospheric muons demonstrated stable detector performance and reliable tracking capability, confirming the suitability of this architecture for muographic measurements. We conclude with an outlook on further developments of the detection system.

physics.ins-det↗

arXiv2026

Results from the GIF++ Long-Term Study of Eco-Friendly Gas Mixtures for RPCs

Gaseous detectors play a crucial role in high-energy physics experiments, yet their operation often relies on fluorinated gases with a very high Global Warming Potential (GWP). Resistive Plate Chambers (RPCs) operated in avalanche mode typically use high-performance gas mixtures based on high-GWP F-gases such as C$_2$H$_2$F$_4$ and SF$_6$. As environmental concerns grow and regulations become increasingly stringent, the development of sustainable gas mixtures has become a global priority. Within the RPC ECOGas@GIF++ Collaboration, a long-term R&D program has investigated eco-friendly gas mixtures for RPCs and assessed their performance under irradiation. RPCs operated with an HFO-1234ze/CO$_2$ mixture were exposed to high particle fluxes at CERN GIF++, accumulating $\mathcal{O}(10^2~\mathrm{mC/cm^2})$ over three years. This ageing campaign is now complete, and the detector performances have been systematically evaluated across a broad range of particle rates. This paper presents preliminary final results from the campaign, along with future perspectives.

physics.ins-det↗

arXiv2025

Performance and long-term aging studies on Eco-Friendly Resistive Plate Chamber detectors

Resistive Plate Chambers detectors are extensively used in several domains of Physics. In High Energy Physics, they are typically operated in avalanche mode with a high-performance gas mixture based on Tetrafluoroethane (C2H2F4), a fluorinated high Global Warming Potential greenhouse gas. The RPC EcoGas@GIF++ Collaboration has pursued an intensive R\&D activity to search for new gas mixtures with low environmental impact, fulfilling the performance expected for the LHC operations as well as for future and different applications. Here, results obtained with new eco-friendly gas mixtures based on Tetrafluoropropene and carbon dioxide, even under high-irradiation conditions, will be presented. Long-term aging tests carried out at the CERN Gamma Irradiation Facility will be discussed along with their possible limits and future perspectives.

physics.ins-det↗

arXiv2025

The ILD Detector: A Versatile Detector for an Electron-Positron Collider at Energies up to 1 TeV

The International Large Detector, ILD, is a detector concept for an experiment at a future high energy lepton collider. The detector has been optimised for precision physics in a range of energies from 90~GeV to about 1~TeV. ILD features a high precision, large volume combined silicon and gaseous tracking system, together with a high granularity calorimeter, all inside a central solenoidal magnetic field. The paradigm of particle flow has been the guiding principle of the design of ILD. ILD is based mostly on technologies which have been demonstrated by extensive research and test programs. The ILD concept is proposed both for linear and circular lepton collider, be it at CERN or elsewhere. The concept has been developed by a group of nearly 60 institutes from around the world, and offers a well developed and powerful environment for science and technology studies at lepton colliders. In this document, the required performance of the detector, the proposed implementation and the readiness of the different technologies needed for the implementation are discussed.

hep-ex↗