An overview of the design, construction and performance of large area triple-GEM prototypes for future upgrades of the CMS forward muon system

GEM detectors are used in high energy physics experiments given their good spatial resolution, high rate capability and radiation hardness. An international collaboration is investigating the possibility of covering the 1.6 < vertical bar eta vertical bar < 2.4 region of the CMS muon endcaps with large-area triple-GEM detectors. The CMS high-eta area is actually not fully instrumented, only Cathode Strip Chamber (CSC) are installed. The vacant area presents an opportunity for a detector technology able to to cope with the harsh radiation environment; these micropattern gas detectors are an appealing option to simultaneously enhance muon tracking and triggering capabilities in a future upgrade of the CMS detector. A general overview of this feasibility study is presented. Design and construction of small (10cm x 10cm) and full-size trapezoidal (1m x 0.5m) triple-GEM prototypes is described. Results from measurements with x-rays and from test beam campaigns at the CERN SPS is shown for the small and large prototypes. Preliminary simulation studies on the expected muon reconstruction and trigger performances of this proposed upgraded muon system are reported

Quality control and beam test of GEM detectors for future upgrades of the CMS muon high rate region at the LHC

Gas Electron Multipliers (GEM) are a proven position sensitive gas detector technology which nowadays is becoming more widely used in High Energy Physics. GEMs offer an excellent spatial resolution and a high particle rate capability, with a close to 100% detection efficiency. In view of the high luminosity phase of the CERN Large Hadron Collider, these aforementioned features make GEMs suitable candidates for the future upgrades of the Compact Muon Solenoid (CMS) detector. In particular, the CMS GEM Collaboration proposes to cover the high-eta region of the muon system with large-area triple-GEM detectors, which have the ability to provide robust and redundant tracking and triggering functions. In this contribution, after a general introduction and overview of the project, the construction of full-size trapezoidal triple-GEM prototypes will be described in more detail. The procedures for the quality control of the GEM foils, including gain uniformity measurements with an x-ray source will be presented. In the past few years, several CMS triple-GEM prototype detectors were operated with test beams at the CERN SPS. The results of these test beam campaigns will be summarised

Quality control and beam test of GEM detectors for future upgrades of the CMS muon high rate region at the LHC

Gas Electron Multipliers (GEM) are a proven position sensitive gas detector technology which nowadays is becoming more widely used in High Energy Physics. GEMs offer an excellent spatial resolution and a high particle rate capability, with a close to 100% detection efficiency. In view of the high luminosity phase of the CERN Large Hadron Collider, these aforementioned features make GEMs suitable candidates for the future upgrades of the Compact Muon Solenoid (CMS) detector. In particular, the CMS GEM Collaboration proposes to cover the high-eta region of the muon system with large-area triple-GEM detectors, which have the ability to provide robust and redundant tracking and triggering functions. In this contribution, after a general introduction and overview of the project, the construction of full-size trapezoidal triple-GEM prototypes will be described in more detail. The procedures for the quality control of the GEM foils, including gain uniformity measurements with an x-ray source will be presented. In the past few years, several CMS triple-GEM prototype detectors were operated with test beams at the CERN SPS. The results of these test beam campaigns will be summarised

Les éditions des "Essais" de Montaigne : le texte de la "Vulgate"

Armaingaud Arthur. Les éditions des "Essais" de Montaigne : le texte de la "Vulgate". In: Comptes rendus des séances de l'Académie des Inscriptions et Belles-Lettres, 54ᵉ année, N. 9, 1910. pp. 765-768

Comparaison des registres français d’arrêt cardiaque extra hospitalier

Background : In France there are three registries on OHCA (out of hospital cardiac arrest) that follow the Utstein model for data collection but their frameworks are different. Question : Following the update of the Utstein resuscitation registry templates in 2015, how could we unify and optimize the frameworks of these French registries ? Methods : Comparing the three French OHCA registries setups using the North American model, using the following eight themes : perimeter of action, method of data collection, method of data management, quality criteria implemented, information sharing, legislation, resources and finally the collection of the core variables according to the ILCOR in 2015. Results : The three registries collect from 79% to 95% of the ILCOR 2015 core variables. However, they have a different target-population and inclusion criteria. Prehospital data collection and data management are organized differently and the three registries do not have automated timestamps. They have completeness rates that are either unknown or that range from 87% to 99%. Conclusion : Today these three registries seem impossible to unify because of different frameworks, selection criteria and objectives. It is essential to have quality data for clinical research and public health measures and therefore highly desirable to optimize their logistics.Introduction : Il existe en France trois principaux registres sur l’ACEH (arrêt cardiaque extrahospitalier) qui suivent le modèle d’Utstein pour le recueil de donnée mais leur mode de fonctionnement diverge. Question : Suite à l’actualisation du modèle d’Utstein par l’ILCOR en 2015, dans quelle mesure pourrait-on unifier et optimiser l’organisation de ces registres français ? Méthode : Comparaison du contenu et de l’organisation des trois registres d’ACEH français en s’aidant du modèle nord-américain, selon les huit axes suivants : le périmètre d’action, la méthode de recueil des données, la méthode de gestion des données, les critères de qualité mis en place, le partage d’expérience, le respect de la législation, les ressources disponibles et enfin le recueil des variables fondamentales selon l’ILCOR en 2015. Résultats : Les trois registres recueillent entre 79% et 95% des variables fondamentales. Ils ont cependant une population cible et des critères d’inclusion non comparables. Le recueil et la gestion des données préhospitalières sont organisés de manières différentes et l’horodatage des actions n’est pas automatisé. Leur taux d’exhaustivité est soit inconnu, soit mesuré à 87% et 99%. Conclusion : En l’état actuel ces trois registres semblent difficile à unifier du fait d’une organisation, de critères d’inclusion et d’objectifs différents. Il est essentiel d’avoir des données de qualité pour la recherche clinique et la mise en place de mesures de santé publique et il serait ainsi souhaitable d'optimiser leur logistique

Montaigne et l'art de la Renaissance

Armaingaud Arthur. Montaigne et l'art de la Renaissance. In: Comptes rendus des séances de l'Académie des Inscriptions et Belles-Lettres, 65ᵉ année, N. 2, 1921. p. 153

Du point apophysaire dans les névralgies et de l'irritation spinale / par le Dr Armaingaud,...

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