arXiv subjects

S. Siddiqui

Publications and source records attributed to S. Siddiqui.

3 recordsLinked to original sources

arXiv2026

Initial results of the TRIUMF ultracold advanced neutron source

We report the first results on ultracold neutron production from a new spallation-driven superfluid $^4$He (He-II) source at TRIUMF, which is being prepared for a new, precise measurement of the neutron electric dipole moment. A total of $(9.3 \pm 0.8)\times 10^{5}$ ultracold neutrons were observed at a proton beam current of \SI{37}{\uA}, when the target was irradiated for a period of \SI{60}{\s}. The results are in fair agreement with expectations based on a detailed simulation of neutron transport and ultracold neutron source cryogenics. There is some indication that the new source might not be as limited by the conduction of heat through the He-II as originally expected. The results indicate that the source is likely to make its ultimate production goals, once the liquid deuterium cold moderator system is completed, with the expectation that $5.7\times 10^7$~UCNs would be detected in the same experiment with full liquid levels. This would, for example, correspond to delivery of $1.4\times 10^6$~UCNs delivered to each of two nEDM measurement cells, and a statistical uncertainty of $1\times 10^{-27}~e$cm on the neutron EDM in 280 days of running.

nucl-ex↗

arXiv2026

i2Slicer: Enabling Flexible and Automated Orchestration of 5G SA End-to-End Network Slices

5G network slicing implies a step forward in customizing radio access and core networks by allowing the creation of logical networks adapted to service requirements. In addition, softwarisation has fueled the emergence of 5G solutions which do not require specialized hardware platforms. Therefore, a key requirement to drive the adoption of 5G slicing by verticals is to simplify its management through automated orchestration. In this paper, we present i2Slicer, a flexible solution to orchestrate the deployment of 5G standalone end-to-end network slices with multi-tenancy and multi-service capabilities. The implementation and evaluation of i2Slicer using state-of-the-art 5G software and hardware demonstrate that it offers a practical and efficient lifecycle management of network slices.

cs.NI↗

arXiv2025

A New Generation of Energy-Economy Modeling at the U.S. Energy Information Administration

Given the rapid pace of energy system development, the time has come to reimagine the U.S. Government's capability to model the long-term evolution of the domestic and global energy system. As a primary custodian of these capabilities, the U.S. Energy Information Administration (EIA) is embarking on the development of a long-term, modular, flexible, transparent, and robust modeling framework that can capture the key dynamics driving the energy system and economy under a wide range of future scenarios. This new capability will leverage the current state of the art in modeling to produce critical insight for researchers, decision makers, and the public. We describe the evolving demands on energy-economy modeling, the capacity and limitations of existing models, and the key features we see as necessary for addressing these demands in our new framework, which is under active development.

physics.soc-ph↗