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CRP on Atomic and Molecular Data for Plasma Modelling Volume 16
2014, HENALLUXArticle scientifiqueThis publication, arising from a Coordinated Research Project on Atomic and Molecular Data for Plasma Modelling, provides information on new data relevant to the edge region of plasmas in nuclear fusion energy devices. In this region, molecules and molecular ions are formed and react with electrons and with each other and fusion plasma modelling requires cross-sections and rate coefficients for such ... -
DEFBETIR : Détection par infrarouge de la signature thermique de défauts et pathologies dans les structures de génie civil en béton
2011, HENALLUXFoRSArticle scientifiqueCe projet de recherche a pour but le développement de techniques de thermographie infrarouge permettant d'ausculter des structures en béton armé, principalement les bassins de stations d'épuration et les tabliers de ponts, de façon à y localiser des zones défectueuses en vue de leur réparation. Les défauts à détecter sont les nids de gravier, les délaminations, ou tout autre défaut ou dégradation ... -
Demain, chacun sera producteur d’électricité
2016, HENALLUXPublication d'intérêt général/presseAvec son projet, Energrid veut décentraliser l'énergie. Grâce à un système de nanogrid, il sera plus facile de gérer la production et le stockage de l'énergie. Demain, vous prendrez peut-être de l'énergie chez votre voisin… qui fera de même chez vous. Nous sommes tous dépendants du réseau électrique tant pour le coût que d’un point de vue technique. Le projet Energrid veut en finir avec les échanges ... -
Développement d'un simulateur de centrale inertielle dédié aux systèmes de navigation par satellites
2017, HENALLUXFoRSArticle scientifiqueCet article présente la réalisation d'un simulateur de centrale inertielle à neuf degrés de liberté. Une centrale inertielle est un instrument utilisé en navigation, capable d'intégrer les mouvements d'un mobile pour estimer son orientation, sa vitesse linéaire, sa position et le champ magnétique ambiant. La centrale inertielle associe des capteurs tels que les gyromètres, les accéléromètres et ... -
Développement d’un échangeur-accumulateur de chaleur pour une maison basse consommation
2019, HENALLUXFoRSArticle scientifiqueCet article détaille la conception et le test d’un échangeur-accumulateur de la chaleur intégré dans la ventilation pour le chauffage d’une maison basse consommation. Une simulation permet de guider le choix d’un design de l'échangeur. Le design final est sélectionné en respectant les contraintes de fabrication. Ensuite, le prototype de l’échangeur est couplé à une pompe à chaleur (PAC) avec un ... -
Développement d’une semi-remorque 50 tonnes polyvalente avec vidage horizontal rapide
2020, HENALLUXActe de conférence ou de colloqueSystème de sécurité pour l’utilisation d’une benne « classique » Le basculement d’une benne est un accident courant dans le milieu de la construction. Un système de sécurité électronique visant à prévoir et empêcher ce basculement est à l’étude. L’article présente le principe de fonctionnement d’un tel système de sécurité. Le système développé étend ce principe et se base sur des mesures inertielles ... -
Differential and total cross sections of mutual neutralization in low-energy collisions of isotopes of H + + H −
2016, HENALLUXArticle scientifiqueMutual neutralization in the collisions of H+ and H− is studied both theoretically and experimentally. The quantum-mechanical ab initio model includes covalent states associated with the H(1)+H(n 3) limits and the collision energy ranges from 1 meV to 100 eV. The reaction is theoretically studied for collisions between different isotopes of the hydrogen ions. From the partial wave scattering ... -
Discrétisation d’un gradient de température lors d’un déplacement liquide à travers un mélange solide
2018, HENALLUXFoRSArticle scientifiqueCet article montre comment discrétiser un gradient de température en tout point lors d’un échange de chaleur entre un liquide et un solide suite au déplacement forcé du premier dans le second. Le gradient de température obtenu permet de déterminer la température de chaque mélange liquide et solide à tout endroit d’un lessiveur de cuisson du bois afin d’établir le modèle énergétique d’un cycle ... -
Dissociative excitation of NeD+
2009, HENALLUXArticle scientifiqueMeasurements of NeD+ dissociative excitation cross section were obtained in Louvain-la-Neuve (UCL, Belgium) by using the animated crossed electron-ion beam method. The electronic structure of the system was calculated by using quantum chemistry calculations for the NeD+ ion and ab initio electron scattering calculations using the complex Kohn variational method for the resonant NeD neutral complex ... -
Electron impact dissociation of ND+: formation of D+
2011, HENALLUXArticle scientifiqueNitrogen is a common contaminant species in fusion reactors such as the ITER (International Thermonuclear Experimental Reactor). Thus, the collisional properties of nitrogen-containing plasma compounds arewidely studiedexperimentally andtheoretically. Here we show the results of absolute cross section measurements for the electron impact dissociative excitation of ND+ yielding D+, especially ... -
Electron impact dissociation of ND+: formation of D+
2011, HENALLUXArticle scientifiqueAbsolute cross sections for electron impact dissociation of ND+ leading to the formation of D+ have been measured by applying the animated electron-ion beam method in the energy range from the reaction threshold up to 2.5 keV. The maximum inclusive cross section is observed to be (16.8 ± 0.8) × 10−17 cm2 at the electron energy of 65.1 eV. The appearance energy for the D+ production is measured to ... -
Electron impact ionization of thymine clusters embedded in superfluid helium droplets
2007, HENALLUXArticle scientifiqueEmbedding molecules in helium clusters has become a powerful technique for the preparation of cold targets for spectroscopy experiments, as well as for the assembly of complex, fragile molecular species. We have recently developed a helium cluster source and a pick-up cell to produce neutral beams of doped helium droplets, to be used as targets in studies on electron collisions with molecules of ... -
Electron impact multiple ionization of argon ions
2010, HENALLUXArticle scientifiqueAbsolute cross sections for electron impact single and multiple ionization of argon ions leading to the formation of Ar q + (q = 2–8) are reported. The animated crossed beam method is applied in the energy range extending from the respective thresholds up to 2.5 keV. The maximum cross sections for the multiply charged products Ar q + (q = 2–8) are measured to be (12.6 ± 0.6) × 10−17 cm2 for Ar2+, ... -
Electron impact multiple ionization of C+ and N+ and O+ ions
2014, HENALLUXArticle scientifiqueAbsolute cross sections for electron impact single and multiple ionization of C+, N+ and O+ ions leading to the formation of Cq+ (q=2-4), Nq+ (q=2-5) and Oq+ (q=2-5) are reported in the energy range extending from the respective thresholds up to 2.5 keV. The general feature of the measured cross sections is investigated. -
Electron-impact dissociation and ionization of NH+: formation of N+ and N2+
2010, HENALLUXArticle scientifiqueAbsolute cross sections for electron-impact dissociation and ionization of NH+ leading to the formation of N+ and N2+ products have been measured by applying the animated electron–ion beam method, in the energy range from the respective thresholds up to 2.5 keV. The maximum total cross sections are observed to be (15.7 ± 0.7) × 10−17 cm2 and (11.1 ± 0.2) × 10−18 cm2 for N+ and N2+, respectively. ... -
Electron-impact dissociation and ionization of OH+ and OD+ ions
2012, HENALLUXArticle scientifiqueAbsolute cross sections for electron impact ionization and dissociation of OH+ and OD+ leading to the formation of the OH2+, O+, O2+, O3+ and D+ ions have been measured by applying the animated electron-ion beam method in the energy range from the respective reaction thresholds up to 2.5 keV. The maximum of the single ionization cross section is found to be (0.95±0.02) × 10−19 cm2 at 155 eV. ... -
Electron-impact dissociation of HeH+: absolute cross sections for the production of Heq+ (q = 1–2) fragments
2014, HENALLUXArticle scientifiqueAbsolute cross sections have been measured for electron-impact dissociative excitation and ionization of the helium-hydride ion (HeH+) leading to the formation of helium ions Heq+ (q = 1–2). Measurements have been performed for electron energies ranging from the respective thresholds up to 2.5 keV. For He+ production, the maximum absolute cross section for dissociative excitation is found to be (2.5 ... -
Electron-impact dissociative ionization of the molecular ion HDO + : A global view
2014, HENALLUXArticle scientifiqueWe present a combined experimental and theoretical study of the fragmentation of HDO2+ molecular ions produced by electron-impact ionization of HDO+ in the collision energy range 20–2500 eV. Experimental absolute partial inclusive cross sections for the production of OD+, OH+, and O+ are reported and compared successfully to theoretical predictions. Ab initio methods are used to calculate the ... -
Electron-impact ionization and dissociation of C2D+
2010, HENALLUXArticle scientifiqueAbsolute cross sections for electron-impact single ionization, dissociative excitation and dissociative ionization of the ethynyl radical ion (C2D+) have been measured for electron energies ranging from the corresponding reaction thresholds to 2.5 keV. The animated crossed electron-ion beam experiment is used and results have been obtained for the production of C2D2+, C2+, C+2, CD+, C+ and D+. The ... -
Electron-impact ionization of atomic hydrogen: dynamical variational treatment
2011, HENALLUXArticle scientifiqueA simple and straightforward calculating scheme is proposed for electron-impact single and multiple ionization of atoms. The method is based on the application of the Hulthén-Kohn dynamical variational principle. An effective charge seen by the scattered electron is determined for a certain type of trial wave functions mathematically in a rigorous way excluding any empirical assumptions. Validity ...