2,950 research outputs found

    Review: Robert Reigle and Paul Whitehead (Editors): Spectral World Musics: Proceedings of the Istanbul Spectral Music Conference

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    This article reviews the book “Spectral World Musics: Proceedings of the Istanbul Spectral Music Conference”, edited by Robert Reigle and Paul Whitehead

    Annual report of the municipal officers of the town of Milan, N.H. for the year ending February 15, 1913.

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    This is an annual report containing vital statistics for a town/city in the state of New Hampshire

    Beam physics via tomographic diagnostics

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    The goal of this thesis work is the study of the beam physics of the negative ion beam for ITER HNB. A new diagnostics is installed on SPIDER, the full-size prototype of ITER negative ion source: the visible tomography. It is composed by a set of visible cameras which measure the light emitted by the beam particles when they interact with the background gas. An algorithm to reconstruct through tomographic inversion the two-dimensional pattern of the beam emission is developed, and the reconstructed profiles are used to study the homogeneity of the beam current, also with the support of a model to directly correlate the beamlet emission with the beamlet current density. Thanks to the masking of most of the apertures composing SPIDER multi-beamlets negative ion beam, the single-beamlet divergence is estimated through the Gaussian fit of the 1D beam profiles. \\ The results obtained by this new technique are used to investigate the beam features as a function of the main source and accelerator parameters, integrating the information provided by all the other diagnostics available. A strong correlation between the beam properties and the plasma features is found, thus a deep investigation of the source plasma is carried out. The beam homogeneity depends on the uniformity of both electrons and negative ions at the extraction region, in order to obtain identical beamlet optics at all the apertures and to avoid localised heating of the extraction grid due to the co-extracted electrons. The estimation of the single-beamlet current density is exploited to better interpret the spectroscopic measurements both close to the grid system (together with the electrostatic probes data), and inside the drivers. This experience is fundamental for the future operation at full performances, when the characterization of the single beamlet will be more challenging. The various operational regimes explored, both with and without caesium evaporation, are investigated to improve the understanding of the physics behind the generation and extraction of a large negative ion beams, when the principal source and accelerator control parameters are varied. This is the first comprehensive analysis of the experimental data measured during the experimental campaign of SPIDER experiment, and the performances achieved in term of beam divergence and homogeneity, as well as beamlet current density and co-extracted electrons currents are presented.The goal of this thesis work is the study of the beam physics of the negative ion beam for ITER HNB. A new diagnostics is installed on SPIDER, the full-size prototype of ITER negative ion source: the visible tomography. It is composed by a set of visible cameras which measure the light emitted by the beam particles when they interact with the background gas. An algorithm to reconstruct through tomographic inversion the two-dimensional pattern of the beam emission is developed, and the reconstructed profiles are used to study the homogeneity of the beam current, also with the support of a model to directly correlate the beamlet emission with the beamlet current density. Thanks to the masking of most of the apertures composing SPIDER multi-beamlets negative ion beam, the single-beamlet divergence is estimated through the Gaussian fit of the 1D beam profiles. \\ The results obtained by this new technique are used to investigate the beam features as a function of the main source and accelerator parameters, integrating the information provided by all the other diagnostics available. A strong correlation between the beam properties and the plasma features is found, thus a deep investigation of the source plasma is carried out. The beam homogeneity depends on the uniformity of both electrons and negative ions at the extraction region, in order to obtain identical beamlet optics at all the apertures and to avoid localised heating of the extraction grid due to the co-extracted electrons. The estimation of the single-beamlet current density is exploited to better interpret the spectroscopic measurements both close to the grid system (together with the electrostatic probes data), and inside the drivers. This experience is fundamental for the future operation at full performances, when the characterization of the single beamlet will be more challenging. The various operational regimes explored, both with and without caesium evaporation, are investigated to improve the understanding of the physics behind the generation and extraction of a large negative ion beams, when the principal source and accelerator control parameters are varied. This is the first comprehensive analysis of the experimental data measured during the experimental campaign of SPIDER experiment, and the performances achieved in term of beam divergence and homogeneity, as well as beamlet current density and co-extracted electrons currents are presented

    Double quasi-Poisson brackets : fusion and new examples

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    We exhibit new examples of double quasi-Poisson brackets, based on some classification results and the method of fusion. This method was introduced by Van den Bergh for a large class of double quasi-Poisson brackets which are said differential, and our main result is that it can be extended to arbitrary double quasi-Poisson brackets. We also provide an alternative construction for the double quasi-Poisson brackets of Van den Bergh associated to quivers, and of Massuyeau-Turaev associated to the fundamental groups of surfaces.Comment: 37pages, 1 figure, including 4 appendices. v2 : minor changes, accepted versio

    Humboldt Lumberjack, January 19, 1939

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    The student newspaper of Humboldt State Universityhttps://digitalcommons.humboldt.edu/studentnewspaper/1147/thumbnail.jp

    Town of Derry annual report fiscal year ending June 30, 2009.

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    This is an annual report containing vital statistics for a town/city in the state of New Hampshire

    Annual report of the town officers of the town of Pittsburg, New Hampshire for the year ending December thirty-first 1960.

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    This is an annual report containing vital statistics for a town/city in the state of New Hampshire

    Temple, New Hampshire 2011 annual report for the year ending December 31, 2011.

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    This is an annual report containing vital statistics for a town/city in the state of New Hampshire

    Be-Amply

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    Este documento trata de mostrar el proceso de diseño seguido para obtener el producto final elaborado, una maleta alternativa, moderna y con un simbolismo implícito, más que un objeto útil. Este proceso comienza desde la elección de elementos a fusionar, pasando por la ideación de conceptos e ideas, investigación de los propios objetos escogidos antes de la fusión y finalmente, proceso de elaboración del prototipo final, no sin antes crear distintas maquetas provisionales.This document tries to show the design process followed to obtain the final elaborate product, an alternative, modern suitcase with an implicit symbolism, rather than a useful object. This process begins from the choice of elements to be merged, through the ideation of concepts and ideas, research of the chosen objects themselves before the fusion and finally, the process of developing the final prototype, but not before creating different provisional models.Departamento de Ingeniería de Sistemas y AutomáticaGrado en Ingeniería en Diseño Industrial y Desarrollo de Product
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