12 research outputs found

    Improved Study of the Multipactor Phenomenon for the MYRRHA 80 kW CW RF Couplers

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    International audienceMYRRHA (Multi Purpose Hybrid Reactor for High Tech Applications) is an Accelerator Driven System (ADS) project. Its superconducting linac will provide a 600 MeV - 4 mA proton beam. The first project phase based on a 100 MeV linac is launched. The Radio-Frequency (RF) couplers have been designed to handle 80 kW CW (Continuous Wave) at 352.2 MHz. This paper describes the multipactor studies on the coupler when it does not work in the nominal configuration without reflected power

    Improved Study of the Multipactor Phenomenon for the MYRRHA 80 kW CW RF Couplers

    No full text
    International audienceMYRRHA (Multi Purpose Hybrid Reactor for High Tech Applications) is an Accelerator Driven System (ADS) project. Its superconducting linac will provide a 600 MeV - 4 mA proton beam. The first project phase based on a 100 MeV linac is launched. The Radio-Frequency (RF) couplers have been designed to handle 80 kW CW (Continuous Wave) at 352.2 MHz. This paper describes the multipactor studies on the coupler when it does not work in the nominal configuration without reflected power

    RF Conditioning of MYRRHA Couplers at IJCLab

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    International audienceMulti-purpose hYbrid Research Reactor for High-tech Applications (MYRRHA) is an experimental accelerator-driven system in development at SCK‱CEN. It will allow fuel developments, material developments for GEN IV systems, material developments for fusion reactors and radioisotope production for medical and industrial applications1. The IJCLab has in charge the industrial monitoring, the quality control and the RF conditioning of the power couplers up to 80KW at 352Mhz. This paper presents the conditioning bench adapted from the successful experience of IJCLab in the conditioning of the XFEL couplers2. The results of the conditioning of prototype couplers are described and discussed

    RF Conditioning of MYRRHA Couplers at IJCLab

    No full text
    International audienceMulti-purpose hYbrid Research Reactor for High-tech Applications (MYRRHA) is an experimental accelerator-driven system in development at SCK‱CEN. It will allow fuel developments, material developments for GEN IV systems, material developments for fusion reactors and radioisotope production for medical and industrial applications1. The IJCLab has in charge the industrial monitoring, the quality control and the RF conditioning of the power couplers up to 80KW at 352Mhz. This paper presents the conditioning bench adapted from the successful experience of IJCLab in the conditioning of the XFEL couplers2. The results of the conditioning of prototype couplers are described and discussed

    An Approach for Component-Level Analysis of Cryogenic Process in Superconducting LINAC Cryomodules

    No full text
    International audiencePowerful superconducting linear accelerators feature accelerating sections consisting in a series of cryomod-ules (CM), each hosting superconducting radiofrequency (SRF) cavities cooled by a cryogenic process. Despite the extensive instrumentation used for the tests and valida-tion of the prototype cryomodules, it is usually very complex to link the measured global thermodynamic efficiency to the individual component performance. Previous works showed methods for assessing the global efficiency and even for allocating performances to sets of components, but few went down to a component level. For that purpose, we developed a set of techniques based on customized instrumentation, on dedicated test proto-cols, and on model-based analysis tools. In practice, we exposed the components to various operating conditions and we compared the measured data to the results from a detailed dynamic component model at the same condi-tions. This method was applied to the cryogenic debug-ging phase of the tests of the MINERVA prototype cry-omodule, which, despite the liquid helium shortage, led to an extensively detailed characterisation, for its valida-tion towards the serial construction

    ESSAI RANDOMISÉ POUR ÉVALUER L’EFFICACITÉ ET LA SÉCURITÉ DE TRAITEMENTS CHEZ DES PATIENTS AMBULATOIRES ATTEINTS DE COVID-19 AYANT DES FACTEURS DE RISQUE ESSAI COVERAGE FRANCE : PRÉSENTATION DU PROTOCOLE

    No full text
    International audienceContext. The Covid-19 pandemic is of unprecedented magnitude and has had major social and health consequences. Primary care professionals, mainly general practitioners, ensure the care of most patients with Covid-19. An early-stage treatment administered to patients with risk factors for developing a severe disease could reduce hospitalization and death rates. No treatment is currently validated in this indication. Objectives. To evaluate the safety and efficacy of experimental candidate agents delivered in outpatient settings to reduce the risk of hospitalization or death in at-risk patients with early-stage proven Covid-19 and no indication for hospital admission. Methods. Multicentric, open-label, multi-arm, multi-stage (MAMS) randomized controlled trial with a pilot tolerability and safety phase, and a clinical efficacy phase. Efficacy will be determined by the proportion of participants who have an indication for hospital admission, administration of acute oxygen therapy (because of Covid-19) or who decease between D0 and D14 in the experimental treatment group compared to the control group. Expected results. This trial will assess the tolerance and efficacy of diverse treatments administered at an early stage of Covid-19, in patients with risk factors of developing a severe disease. It will also provide information that can contribute to increase primary care actors' ability to conduct clinical trials at the national level.Contexte. La pandĂ©mie de Covid-19 a eu d’importantes rĂ©percussions sanitaires et sociales. Les acteurs de soins primaires, en particulier les spĂ©cialistes de mĂ©decine gĂ©nĂ©rale, prennent en charge la majoritĂ© des patients atteints de Covid-19. Un traitement prĂ©coce initiĂ© en premiĂšre ligne, notamment chez les patients Ă  risque d’aggravation, pourrait rĂ©duire les taux d’hospitalisation et de dĂ©cĂšs. Aucun traitement n’est actuellement validĂ© dans cette indication.Objectif. Évaluer l’efficacitĂ© et la tolĂ©rance de traitements expĂ©rimentaux administrĂ©s Ă  un stade prĂ©coce, en ambulatoire, dans le but de diminuer le risque de dĂ©velopper une forme sĂ©vĂšre de la maladie chez des patients atteints de Covid-19 ayant des facteurs de risque d’aggravation et qui n’ont pas de critĂšres d’hospitalisation.MĂ©thodes. Essai thĂ©rapeutique contrĂŽlĂ© randomisĂ© multicentrique, en ouvert, multi-bras, multi-Ă©tapes (MAMS) comprenant une phase pilote d’évaluation de la tolĂ©rance et une phase d’évaluation de l’efficacitĂ©. L’efficacitĂ© sera Ă©valuĂ©e par la proportion de participants ayant eu une indication d’hospitalisation, une indication d’oxygĂ©nothĂ©rapie aiguĂ« (en raison de la Covid-19), ou dĂ©cĂ©dĂ©s entre J0 et J14 dans le groupe traitement expĂ©rimental par rapport au groupe tĂ©moin. RĂ©sultats attendus. Cet essai permettra d’évaluer la tolĂ©rance et l’efficacitĂ© de l’administration prĂ©coce de divers traitements dans le cadre de la Covid-19 chez des patients Ă  risque de dĂ©velopper des formes graves. Il fournira Ă©galement des informations susceptibles d’amĂ©liorer la recherche clinique interventionnelle impliquant la personne humaine en soins primaires et sa structuration

    ESSAI RANDOMISÉ POUR ÉVALUER L’EFFICACITÉ ET LA SÉCURITÉ DE TRAITEMENTS CHEZ DES PATIENTS AMBULATOIRES ATTEINTS DE COVID-19 AYANT DES FACTEURS DE RISQUE ESSAI COVERAGE FRANCE : PRÉSENTATION DU PROTOCOLE

    No full text
    International audienceContext. The Covid-19 pandemic is of unprecedented magnitude and has had major social and health consequences. Primary care professionals, mainly general practitioners, ensure the care of most patients with Covid-19. An early-stage treatment administered to patients with risk factors for developing a severe disease could reduce hospitalization and death rates. No treatment is currently validated in this indication. Objectives. To evaluate the safety and efficacy of experimental candidate agents delivered in outpatient settings to reduce the risk of hospitalization or death in at-risk patients with early-stage proven Covid-19 and no indication for hospital admission. Methods. Multicentric, open-label, multi-arm, multi-stage (MAMS) randomized controlled trial with a pilot tolerability and safety phase, and a clinical efficacy phase. Efficacy will be determined by the proportion of participants who have an indication for hospital admission, administration of acute oxygen therapy (because of Covid-19) or who decease between D0 and D14 in the experimental treatment group compared to the control group. Expected results. This trial will assess the tolerance and efficacy of diverse treatments administered at an early stage of Covid-19, in patients with risk factors of developing a severe disease. It will also provide information that can contribute to increase primary care actors' ability to conduct clinical trials at the national level.Contexte. La pandĂ©mie de Covid-19 a eu d’importantes rĂ©percussions sanitaires et sociales. Les acteurs de soins primaires, en particulier les spĂ©cialistes de mĂ©decine gĂ©nĂ©rale, prennent en charge la majoritĂ© des patients atteints de Covid-19. Un traitement prĂ©coce initiĂ© en premiĂšre ligne, notamment chez les patients Ă  risque d’aggravation, pourrait rĂ©duire les taux d’hospitalisation et de dĂ©cĂšs. Aucun traitement n’est actuellement validĂ© dans cette indication.Objectif. Évaluer l’efficacitĂ© et la tolĂ©rance de traitements expĂ©rimentaux administrĂ©s Ă  un stade prĂ©coce, en ambulatoire, dans le but de diminuer le risque de dĂ©velopper une forme sĂ©vĂšre de la maladie chez des patients atteints de Covid-19 ayant des facteurs de risque d’aggravation et qui n’ont pas de critĂšres d’hospitalisation.MĂ©thodes. Essai thĂ©rapeutique contrĂŽlĂ© randomisĂ© multicentrique, en ouvert, multi-bras, multi-Ă©tapes (MAMS) comprenant une phase pilote d’évaluation de la tolĂ©rance et une phase d’évaluation de l’efficacitĂ©. L’efficacitĂ© sera Ă©valuĂ©e par la proportion de participants ayant eu une indication d’hospitalisation, une indication d’oxygĂ©nothĂ©rapie aiguĂ« (en raison de la Covid-19), ou dĂ©cĂ©dĂ©s entre J0 et J14 dans le groupe traitement expĂ©rimental par rapport au groupe tĂ©moin. RĂ©sultats attendus. Cet essai permettra d’évaluer la tolĂ©rance et l’efficacitĂ© de l’administration prĂ©coce de divers traitements dans le cadre de la Covid-19 chez des patients Ă  risque de dĂ©velopper des formes graves. Il fournira Ă©galement des informations susceptibles d’amĂ©liorer la recherche clinique interventionnelle impliquant la personne humaine en soins primaires et sa structuration

    ESSAI RANDOMISÉ POUR ÉVALUER L’EFFICACITÉ ET LA SÉCURITÉ DE TRAITEMENTS CHEZ DES PATIENTS AMBULATOIRES ATTEINTS DE COVID-19 AYANT DES FACTEURS DE RISQUE ESSAI COVERAGE FRANCE : PRÉSENTATION DU PROTOCOLE

    No full text
    International audienceContext. The Covid-19 pandemic is of unprecedented magnitude and has had major social and health consequences. Primary care professionals, mainly general practitioners, ensure the care of most patients with Covid-19. An early-stage treatment administered to patients with risk factors for developing a severe disease could reduce hospitalization and death rates. No treatment is currently validated in this indication. Objectives. To evaluate the safety and efficacy of experimental candidate agents delivered in outpatient settings to reduce the risk of hospitalization or death in at-risk patients with early-stage proven Covid-19 and no indication for hospital admission. Methods. Multicentric, open-label, multi-arm, multi-stage (MAMS) randomized controlled trial with a pilot tolerability and safety phase, and a clinical efficacy phase. Efficacy will be determined by the proportion of participants who have an indication for hospital admission, administration of acute oxygen therapy (because of Covid-19) or who decease between D0 and D14 in the experimental treatment group compared to the control group. Expected results. This trial will assess the tolerance and efficacy of diverse treatments administered at an early stage of Covid-19, in patients with risk factors of developing a severe disease. It will also provide information that can contribute to increase primary care actors' ability to conduct clinical trials at the national level.Contexte. La pandĂ©mie de Covid-19 a eu d’importantes rĂ©percussions sanitaires et sociales. Les acteurs de soins primaires, en particulier les spĂ©cialistes de mĂ©decine gĂ©nĂ©rale, prennent en charge la majoritĂ© des patients atteints de Covid-19. Un traitement prĂ©coce initiĂ© en premiĂšre ligne, notamment chez les patients Ă  risque d’aggravation, pourrait rĂ©duire les taux d’hospitalisation et de dĂ©cĂšs. Aucun traitement n’est actuellement validĂ© dans cette indication.Objectif. Évaluer l’efficacitĂ© et la tolĂ©rance de traitements expĂ©rimentaux administrĂ©s Ă  un stade prĂ©coce, en ambulatoire, dans le but de diminuer le risque de dĂ©velopper une forme sĂ©vĂšre de la maladie chez des patients atteints de Covid-19 ayant des facteurs de risque d’aggravation et qui n’ont pas de critĂšres d’hospitalisation.MĂ©thodes. Essai thĂ©rapeutique contrĂŽlĂ© randomisĂ© multicentrique, en ouvert, multi-bras, multi-Ă©tapes (MAMS) comprenant une phase pilote d’évaluation de la tolĂ©rance et une phase d’évaluation de l’efficacitĂ©. L’efficacitĂ© sera Ă©valuĂ©e par la proportion de participants ayant eu une indication d’hospitalisation, une indication d’oxygĂ©nothĂ©rapie aiguĂ« (en raison de la Covid-19), ou dĂ©cĂ©dĂ©s entre J0 et J14 dans le groupe traitement expĂ©rimental par rapport au groupe tĂ©moin. RĂ©sultats attendus. Cet essai permettra d’évaluer la tolĂ©rance et l’efficacitĂ© de l’administration prĂ©coce de divers traitements dans le cadre de la Covid-19 chez des patients Ă  risque de dĂ©velopper des formes graves. Il fournira Ă©galement des informations susceptibles d’amĂ©liorer la recherche clinique interventionnelle impliquant la personne humaine en soins primaires et sa structuration

    ESSAI RANDOMISÉ POUR ÉVALUER L’EFFICACITÉ ET LA SÉCURITÉ DE TRAITEMENTS CHEZ DES PATIENTS AMBULATOIRES ATTEINTS DE COVID-19 AYANT DES FACTEURS DE RISQUE ESSAI COVERAGE FRANCE : PRÉSENTATION DU PROTOCOLE

    No full text
    International audienceContext. The Covid-19 pandemic is of unprecedented magnitude and has had major social and health consequences. Primary care professionals, mainly general practitioners, ensure the care of most patients with Covid-19. An early-stage treatment administered to patients with risk factors for developing a severe disease could reduce hospitalization and death rates. No treatment is currently validated in this indication. Objectives. To evaluate the safety and efficacy of experimental candidate agents delivered in outpatient settings to reduce the risk of hospitalization or death in at-risk patients with early-stage proven Covid-19 and no indication for hospital admission. Methods. Multicentric, open-label, multi-arm, multi-stage (MAMS) randomized controlled trial with a pilot tolerability and safety phase, and a clinical efficacy phase. Efficacy will be determined by the proportion of participants who have an indication for hospital admission, administration of acute oxygen therapy (because of Covid-19) or who decease between D0 and D14 in the experimental treatment group compared to the control group. Expected results. This trial will assess the tolerance and efficacy of diverse treatments administered at an early stage of Covid-19, in patients with risk factors of developing a severe disease. It will also provide information that can contribute to increase primary care actors' ability to conduct clinical trials at the national level.Contexte. La pandĂ©mie de Covid-19 a eu d’importantes rĂ©percussions sanitaires et sociales. Les acteurs de soins primaires, en particulier les spĂ©cialistes de mĂ©decine gĂ©nĂ©rale, prennent en charge la majoritĂ© des patients atteints de Covid-19. Un traitement prĂ©coce initiĂ© en premiĂšre ligne, notamment chez les patients Ă  risque d’aggravation, pourrait rĂ©duire les taux d’hospitalisation et de dĂ©cĂšs. Aucun traitement n’est actuellement validĂ© dans cette indication.Objectif. Évaluer l’efficacitĂ© et la tolĂ©rance de traitements expĂ©rimentaux administrĂ©s Ă  un stade prĂ©coce, en ambulatoire, dans le but de diminuer le risque de dĂ©velopper une forme sĂ©vĂšre de la maladie chez des patients atteints de Covid-19 ayant des facteurs de risque d’aggravation et qui n’ont pas de critĂšres d’hospitalisation.MĂ©thodes. Essai thĂ©rapeutique contrĂŽlĂ© randomisĂ© multicentrique, en ouvert, multi-bras, multi-Ă©tapes (MAMS) comprenant une phase pilote d’évaluation de la tolĂ©rance et une phase d’évaluation de l’efficacitĂ©. L’efficacitĂ© sera Ă©valuĂ©e par la proportion de participants ayant eu une indication d’hospitalisation, une indication d’oxygĂ©nothĂ©rapie aiguĂ« (en raison de la Covid-19), ou dĂ©cĂ©dĂ©s entre J0 et J14 dans le groupe traitement expĂ©rimental par rapport au groupe tĂ©moin. RĂ©sultats attendus. Cet essai permettra d’évaluer la tolĂ©rance et l’efficacitĂ© de l’administration prĂ©coce de divers traitements dans le cadre de la Covid-19 chez des patients Ă  risque de dĂ©velopper des formes graves. Il fournira Ă©galement des informations susceptibles d’amĂ©liorer la recherche clinique interventionnelle impliquant la personne humaine en soins primaires et sa structuration
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