60,361 research outputs found
Overview and Status of the CMS Silicon Strip Tracker
The CMS experiment at the LHC features the largest Silicon Strip Detector
ever built. The impact of the operating conditions and physics requirements on
the design choices of the CMS Silicon Tracker is reviewed. The readiness of the
Silicon Strip Tracker for the tentatively scheduled CMS commissioning in Summer
2008 is briefly described.Comment: 3 pages, 2 figures, conference proceedings for the 2007 Europhysics
Conference on High Energy Physics, Manchester, England, 19-25 July 200
Analysis of power converters with devices of SiC for applications in electric traction systems
This article presents the analysis of two topologies
of power converters. Voltage Source Inverter (VSI) and Current
Source Inverter (CSI) proposals for traction system applications,
these topologies are implemented with silicon carbide devices.
The use of SiC semiconductors allow working at high switching
frequency (100KHz), increase the working temperature range
and decreasing power losses during conduction and activation of
the semiconductors.
The objective is analyze these topologies and select the one that
provides the best performance and behavior at high frequency
to improve it on a electric traction system.Postprint (author's final draft
Alignment of the ATLAS Inner Detector Tracking System
The ATLAS detector at CERN's Large Hadron Collider (LHC) is equipped with a
tracking system at its core (the Inner Detector, ID) consisting of silicon and
gaseous straw tube detectors. The physics performance of the ID requires a
precision alignment; a challenge involving complex algorithms and significant
computing power. The alignment algorithms were already validated on: Combined
Test Beam data, Cosmic Ray runs and simulated physics events. The alignment
chain was tested on a daily basis in exercises that mimicked ATLAS data taking
operations. ID commissioning after final installation into the ATLAS detector
has yielded thousands of reconstructed cosmic ray tracks, which have been used
for an initial alignment of the ID before the LHC start-up. A hardware system
using Frequency Scanning Interferometry will be used to monitor structural
deformations. Given the programme outlined here, the ATLAS Inner Detector has
had a solid preparation for LHC collisions.Comment: ICHEP0
Extending systems-on-chip to the third dimension : performance, cost and technological tradeoffs.
Because of the today's market demand for high-performance, high-density portable hand-held applications, electronic system design technology has shifted the focus from 2-D planar SoC single-chip solutions to different alternative options as tiled silicon and single-level embedded modules as well as 3-D integration. Among the various choices, finding an optimal solution for system implementation dealt usually with cost, performance and other technological trade-off analysis at the system conceptual level. It has been identified that the decisions made within the first 20% of the total design cycle time will ultimately result up to 80% of the final product cost. In this paper, we discuss appropriate and realistic metric for performance and cost trade-off analysis both at system conceptual level (up-front in the design phase) and at implementation phase for verification in the three-dimensional integration. In order to validate the methodology, two ubiquitous electronic systems are analyzed under various implementation schemes and discuss the pros and cons of each of them
Renewable energy for Latium: looking for innovative technologies in PV and solar thermal field.
European METTTES Project, financed within the FP6-2005-INNOV-7 call, aimed to test a new methodology to encourage the launch of transnational collaborations technology based among European small and medium enterprises (SMEs) and/or research organizations, focusing its attention on regional technology demand, influenced by changes in regulations and standards and fostered by local incentives. METTTES considered European directives, national, regional and local measures (i.e. incentives, projects, etc.) potentially influencing companiesâ behavior. In addition, METTTES has also taken into account the IPPC (Integrated Pollution Prevention and Control) Directive 96/61/EC, whose purpose is to achieve an integrated pollution prevention and control from the industrial activities. At the end of these analysis, METTTES derived the technology demand not from the needs of individual enterprises, but instead from the regional system. A certain number of Regional Demand Profiles (RDPs) on particular interesting industrial fields have been collected at European level; the documentation includes a comprehensive analysis and detailed presentation of current regional technology demands and forecasts as well as foresight regarding future demands triggered by legal requirements new administrative regulations or national environmental policy and BATs analysis. Each RDP document has been edited with the collaboration of local stakeholders and administrations and by auditing involving SMEs. Results of each RDP have been high quality Technology Requests (TRs) expressed by local companies which seek technological collaboration. For Latium Region this task has been performed by CNR in the sector of PV and solar thermal technologies
Performance of the CMS Pixel Detector at an upgraded LHC
The CMS experiment will include a pixel detector for pattern recognition and
vertexing. It will consist of three barrel layers and two endcaps on each side,
providing three space-points up to a pseudoraditity of 2.1. Taking into account
the expected limitations of its performance in the LHC environment an 8-9 layer
pixel detector for an upgraded LHC is discussed.Comment: Contribution to the 10th European Symposium on Semiconductor
Detectors, June 12 - 16, 2005 in Wildbad Kreuth, Germany. 6 pages, 4 figures,
1 table. Referee's comments implemente
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