15 research outputs found

    CMS physics technical design report : Addendum on high density QCD with heavy ions

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    CMS ECAL Barrel. The Worst Combination of Loads

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    Linear superposition of responses of a structure to different load cases delivered by linear analysis methods can be used to obtain its response to any linear combination of those load cases. this way extreme response values can be investigated when the magnitudes of the interacting loads ( their load factors) vary within specified ranges. The load factors can be regarded as the co-ordinates of a combined load case in a vectorial load space. In this paper, for the case of correlated load factors in the load space, the Lagrangean Multiplicator method is applied to determine extreme response values and the corresponding load factors. Not only summable response quantities such as components of displacements, stresses, forces and moments, but also the Von Mises stress, the buckling load factor and the modal frequency of a pre-stressed structure are addressed

    The Super-Basket: Incorporation of Conical Reinforcements in the CMS ECAL EB Support Structure

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    This document is based on information available at the end of 2001 and summarises the main steps of an important design revision initiated at the end of 1999. Early in 2002 the design was submitted to technical reviews that validated the structural concept. With some changes affecting the material and the screwed connections clearance was given to produce a Super Basket prototype delivered in July 2002. From the assembly tests results the review committee validated the computations. Some further detail changes to the Super-Basket front connection were suggested and implemented in tests until November 2002. The committee finally gave a full approval to the design and authorised the serial production of Super-Baskets in December 2002. Technical notes accompanying the design, test and review steps since the January 2002 review will be condensed in a single document to be published in 2003

    Wide-Field Interferometric Measurements Of Nonstationary Complex Coherence Function

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    We demonstrate an optimized two-step procedure for measuring the full complex coherence function. The measurement relies on a wavefront shearing interferometer that permits characterizing nonstationary fields over an extended angular domain. The accuracy of the coherence measurement was demonstrated by excellent agreement with theoretical predictions

    Transformation Of Complex Spatial Coherence Function In Reflection From Random Media

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    We investigate both experimentally and numerically the transformation of the spatial coherence function (SCF) reflected from media with both surface and volume scattering, and demonstrate the conditions for the SCF survivability during scattering

    Efficient Measurement Of Nonstationary Complex Coherence Functions

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    We demonstrate an accurate, two-step procedure for measuring the full complex coherence function. The measurement relies on a wavefront shearing interferometer that permits characterizing nonstationary fields over an extended angular domain

    Transfer Of Complex Spatial Coherence Function In Reflection From Inhomogeneous Scattering Media

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    We investigate both experimentally and numerically the transformation of spatial coherence function (SCF) during reflection from a scattering medium. We demonstrate that the information about SCF of the incident field survives scattering at grazing angles of incidence and for angularly detuned observation direction

    CMS : the TriDAS Project Technical Design Report; v.1, the Trigger Systems

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