515664 research outputs found
Sort by
Elasticity, Plasticity, and Fracture Toughness of REBCO Coated Conductors Characterized via Micromechanical Tests at Room Temperature
No full textREBCO, the leading candidate conductor for ultra high field magnets, is typically produced in the form of thin tapes, consisting of multiple layers of diverse materials with very different natures and properties. Knowledge of the mechanical properties of these different layers is crucial for magnet design. In this paper, we propose a methodology to measure the elasticity, plasticity and fracture toughness of conductor layer materials, at the scale of its constituents, based on nanoindentation, micropillar compression and micropillar splitting techniques. Measurements with these techniques are carried out at room temperature on a commercial conductor, and the results obtained are compared to the values found in the literature and to those specified by the manufacturers
Development, Fabrication & Test of the Round, Multi-Layer REBCO Cables of the Cold Powering Systems of the HL-LHC
No full textThe magnets of the High Luminosity Upgrade of the Large Hadron collider (HL-LHC) will be electrically connected through Cold Powering Systems incorporating superconducting, 100 kA class, power transmission lines to direct current power converters in service galleries. These transmission lines or ‘Superconducting Links’ are based on multi-circuit magnesium di-boride () cables in 74.5–120 m long flexible cryostats. In the LHC tunnel, the Superconducting Links are electrically connected via niobium-titanium to the HL-LHC magnets and in the service galleries through flexible, round, rare-earth-barium-copper-oxide (REBCO) cables to current leads. We have established at CERN the cabling and quality control capabilities required to produce the REBCO cables of the HL-LHC Cold Powering Systems. In Q1 2024, we have successfully completed the assembly and the electrical and cryogenic cold testing of the 1st full system transporting combined currents of 94 kA while cooled with a helium gas flow rate flow of ≤5 g/s. In this manuscript we report on the cabling of the REBCO cables, the quality control process and results as well as on the splice performance during the cold test of the Cold Powering System
2nd FPGA Developers' Forum (FDF) meeting
No full textThe reuse of predefined IP cores is a well-established practice in semiconductor design, offering cost and technical advantages. However, commercial providers must meet diverse implementation requirements, ensuring compliance with specifications while optimizing power, frequency, gate utilization, and feature scope. Additionally, IP cores must function reliably across FPGA and ASIC platforms, often under harsh conditions.
Fault tolerance demands techniques like triple-mode redundancy, error correction codes, and fail-safe state machines—but the greater challenge lies in verification and validation. These processes are time-intensive and costly, especially for third-party certification.
This paper presents a case study on implementing, verifying, and validating a PSI5 Controller IP core developed by SmartDV to meet ASIL-B certification under ISO 26262. It highlights key challenges and best practices for designing error-redundant IP cores
Top cross section summary plots - May 2025
No full textSummary plots related to top-quark cross section measurements from ATLAS only and from ATLAS+CMS. May 2025 update
Visit by Her Excellency Professor Marija Jakubauskienė, Minister of Health, Lithuania
No full textVisit by Her Excellency Ms Marija Jakubauskienė, Minister of Health, Lithuani
Latest Higgs Boson Inclusive and Differential Cross-Section Measurements
No full textThroughout the Large Hadron Collider's Run 2, the ATLAS and CMS Collaborations made huge strides in characterizing the Higgs boson. This paper presents several recent analyses by the two collaborations with the full Run 2 dataset, released for the 2025 Moriond Electroweak conference. The analyses measure production cross-sections of the Higgs boson in the and decay channels, inclusively and differentially. The results show consistency with the Standard Model, and demonstrate how innovative techniques and interpretation methods can extend the sensitivity to physics beyond the Standard Model
Mechanical and statistical analysis of hand-woven jute fibre composite laminates with bio-based and synthetic matrices
No full textThis study describes the use of continuous jute yarn fabrics innovatively manufactured through manual loom, followed by a hand lay-up process to obtain composite laminates with biobased castor oil and epoxy systems. A full factorial design (22) is employed to evaluate the effects of matrix phases (epoxy and castor oil polymers) and jute fibres (uni- and bidirectional fabrics) on the apparent density, porosity, tensile, three-point bending, and Charpy impact responses. The three-point bending behaviour is also predicted through numerical simulations using a finite element numerical analysis to validate the elastic behaviour of the laminates. The incorporation of castor oil matrix results in decreased density, tensile modulus, flexural strength, and flexural modulus, while simultaneously increasing the porosity and the impact resistance compared to the epoxy laminates. Additionally, unidirectional fabrics have lower porosity and enhanced mechanical properties in the longitudinal direction compared to bidirectional reinforcements. Overall, these composites appear to be sustainable and cost-effective alternatives for use within secondary structural design applications
2nd FPGA Developers' Forum (FDF) meeting
No full textSoftware programming languages have trained us to view computing in terms of a handful of operations over a handful of integer and floating-point formats: those supported by general-purpose processors and GPUs. In FPGAs, however, we have the opportunity to design the arithmetic for the application. This is both a qualitative challenge (what is the best way to compute an exponential or an FFT in an FPGA?) and a quantitative one (how many bits are necessary and sufficient on each bus of the hardware?).
Addressing these challenges has been the goal of the open-source FloPoCo project (www.flopoco.org) for 15 years. This talk will demonstrate some of its fancy operators, review some of the methodologies developed for optimizing and testing them, and discuss the challenges and opportunities of HLS in this context. It will also shamelessly advertise our recent book "Application-Specific Arithmetic: Computing Just Right for the Reconfigurable Computer and the Dark Silicon Era"