The Knowledge Factory - Sur le même thème https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/medieval-wall-paintings-dated-using-carbon-.aspx DRF english version en-US https://www.cea.fr/_layouts/15/images/i2i/icon-144x144-1033.png The Knowledge Factory - Sur le même thème https://www.cea.fr/drf/english Successful testing of a Nb3Sn superconducting coil entirely produced at the CEA-Irfu https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/successful-testing-of-an-nbsn-superconducting-coil-entirely-produced-at-the-cea-irfu.aspx The Irfu has entirely manufactured a test coil in superconducting niobium-tin (Nb3Sn), which was successfully tested at CERN. This opens the way for the development of compact magnets capable of producing a magnetic field twice as large as what is currently available, for use in future particle accelerators. Particle accelerator ; Tools & research instruments general public ; Journalists ; Researchers Irfu Découvertes et avancées ; Scientific result Tue, 04 Oct 2022 10:00:00 GMT Plutonium isotopy as a dating tool to reconstruct the recent history of land use in South America https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/plutonium-isotopy-as-a-dating-tool-to-reconstruct-the-recent-history-of-land-use-in-south-america.aspx A French-South American consortium led by the LSCE (CEA-CNRS-UVSQ) is working to explain the chronology and spatial distribution of radionuclides deposited in South America following atmospheric nuclear testing. Their research, based on measurements of plutonium isotopes in soil and sediment samples, will enable the precise reconstruction of the evolution in land use since the 1960s. Environment ; Agronomy ; Radioactivity ; Dating ; Impact of climate change general public ; Journalists ; Researchers LSCE Scientific result ; Découvertes et avancées Mon, 11 Jul 2022 10:00:00 GMT IPHI-neutrons has recorded its first diffraction measurements! https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/iphi-neutrons-has-recorded-its-first-diffraction-measurements.aspx Researchers from the CEA-Iramis (LLB) and CEA-Irfu have validated the design of the proton-neutron conversion target to be used for the upcoming compact high-intensity neutron source (the French Sonate project). Particle accelerator ; Tools & research instruments ; Characterisation general public ; Journalists ; Researchers Irfu Découvertes et avancées ; Scientific result Mon, 04 Apr 2022 10:00:00 GMT The KATRIN experiment has set a new record of less than 0.8 eV for the mass of neutrinos https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/the-katrin-experiment-has-set-a-new-record-for-the-mass-of-neutrinos.aspx The Karlsruhe Tritium Neutrino Experiment (KATRIN) has just crossed a symbolic threshold. The collaboration, which includes the CEA-Irfu, has revealed a new upper limit of 0.8 eV/c2 for the mass of neutrinos. This result is of fundamental interest for both particle physics and cosmology. Particle physics ; Radioactivity ; Fundamental Research general public ; Researchers ; Journalists Irfu Découvertes et avancées ; Scientific result Tue, 15 Feb 2022 11:00:00 GMT A global compilation of marine and continental sediment cores dated by cesium-137 and lead-210 https://www.cea.fr/drf/english/Pages/News/Scientific-results/2022/a-global-compilation-of-marine-and-continental-sediment-cores-dated-by-cesium-and-lead.aspx The LSCE (CEA-CNRS-UVSQ) and the EDYTEM laboratory (CNRS - Université Savoie Mont Blanc - Ministère de la Culture) have established a comprehensive overview of cesium-137 fallout observed in sedimentary archives around the world. This database makes it possible to improve the dating of sedimentary cores. Environment ; Dating ; Climate general public ; Journalists ; Researchers LSCE Découvertes et avancées ; Scientific result Fri, 03 Dec 2021 11:00:00 GMT Optimizing the acceleration of electrons in the oscillating field of an ultra-high intensity laser pulse https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/optimizing-the-acceleration-of-electrons-in-the-oscillating-field-of-an-ultra-high-intensity-laser-pulse.aspx Researchers from the LSI (CEA-Iramis) and their partners are showing that it is possible to accelerate electrons more efficiently by laser-plasma interaction, using a progressive rotation of the laser wave front. Laser ; Particle accelerator ; Simulation & modelling general public ; Journalists ; Researchers Iramis Découvertes et avancées ; Scientific result Wed, 08 Sep 2021 10:00:00 GMT The LHC ATLAS receives state-of-the-art electronics for its calorimeter https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/the-lhc-atlas-receives-state-of-the-art-electronics-for-its-calorimeter.aspx After a decade of R&D, the Irfu delivered 74 new electronic boards produced by the company FEDD to CERN in July 2021, for use with the ATLAS electromagnetic calorimeter. These boards will be used to handle the increasing data flow that will be produced by the LHC as soon as it restarts in February 2022. Particle accelerator ; Particle physics ; Characterisation ; Electronics general public ; Journalists ; Researchers Irfu Découvertes et avancées ; Scientific result Tue, 31 Aug 2021 10:00:00 GMT Accelerating electrons without diverting them using a radially polarized laser https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/accelerating-electrons-without-diverting-them-using-a-radially-polarized-laser.aspx Researchers from the CEA-Iramis and the Laboratoire d’Optique Appliquée (ENSTA/X/CNRS) have succeeded for the first time in efficiently accelerating electrons to relativistic energies using a radially polarized laser. Particle accelerator ; Laser ; Quantum Physics general public ; Journalists ; Researchers Découvertes et avancées ; Scientific result Tue, 27 Apr 2021 10:00:00 GMT The wax bust of Flora is not by Leonardo da Vinci https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/the-wax-bust-of-flora-is-not-by-leonardo-da-vinci.aspx Researchers from the LSCE/LMC14 (CEA-CNRS-UVSQ) and the Institut de recherche de Chimie Paris (CNRS-Chimie ParisTech-C2RMF) have settled a long-standing controversy: The wax bust of Flora kept in the Bode Museum in Berlin is later than the Renaissance. To achieve this, they conducted a rigorous investigation, combining chemical analyses and carbon-14 measurements, and succeeded in meeting the challenge of dating an extract of marine animal, spermaceti. Dating ; Tools & research instruments ; Art ; History general public ; Journalists ; Researchers LSCE Scientific result ; Découvertes et avancées Thu, 15 Apr 2021 10:00:00 GMT KATRIN restricts further the existence of sterile neutrinos https://www.cea.fr/drf/english/Pages/News/Scientific-results/2021/katrin-restricts-further-the-existence-of-sterile-neutrinos.aspx The data collected in 2019 by the KATRIN collaboration, in which CEA-Irfu participates, had made it possible to constrain the mass of neutrinos in an unprecedented way, leading to the world best upper limit for direct measurements. Another analysis of these same data reveals that they do not contain the signature of a hypothetical sterile neutrino. The experiment will continue, with increasing sensitivity, until 2024. Particle physics ; Radioactivity ; Tools & research instruments general public ; Journalists ; Researchers Irfu Scientific result Thu, 28 Jan 2021 11:00:00 GMT Experiments at GANIL probe the properties of supernovae https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/experiments-at-ganil-probe-the-properties-of-supernovae1113-5217.aspx Nuclear physicists at the GANIL facility/Institute of Research into the Fundamental Laws of the Universe (IRFU) are using a heavy-ion accelerator to recreate experiment conditions in order to probe the physics of dying massive stars, before they explode (in a supernova). Nuclear physics ; Particle accelerator ; Simulation & modelling ; Stars general public ; Journalists ; Researchers Ganil Scientific result Thu, 29 Oct 2020 11:00:00 GMT New reference map of radionuclide concentrations in soils of Western Europe https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/new-reference-map-of-radionuclide-concentrations-in-soils-of-Western-Europe.aspx An international consortium of scientists, including the Laboratoire des Sciences du Climat et de l'Environnement (LSCE - CEA/CNRS/UVSQ, Institut Pierre Simon Laplace, Université Paris-Saclay), used a new method to refine the map of caesium and plutonium radionuclide concentrations in soils in France and several neighbouring countries. Environment ; Radioactivity general public ; Journalists ; Researchers LSCE Scientific result Thu, 16 Jul 2020 10:00:00 GMT Medieval wall paintings dated using carbon-14 https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/medieval-wall-paintings-dated-using-carbon-.aspx For the first time, wall paintings from the Late Middle Ages in a castle in Burgundy and a church in Switzerland have undergone absolute dating, by measuring the carbon-14 contained in a pigment widely used in the paint, namely lead white. Dating ; Radioactivity ; Particle accelerator general public ; Journalists ; Researchers DRF Scientific result Tue, 16 Jun 2020 10:00:00 GMT Detecting trace amounts of uranium in water https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/detecting-trace-amounts-of-uranium-in-water.aspx The Captot heavy metal sensor, developed by the Iramis-LSI over the last ten years, could be used to detect traces of uranium in water. This would be a simple, rapid field solution to monitor the environment, for example during the cleanup and dismantling of nuclear facilities. Chemistry ; Environment ; Remediation ; Radioactivity ; Materials ; Technologies ; Innovation for industry general public ; Journalists ; Researchers Iramis Scientific result ; Industrial partnerships Thu, 09 Jan 2020 11:00:00 GMT HeII in the HL-LHC collider https://www.cea.fr/drf/english/Pages/News/Scientific-results/2019/heII-in-the-hl-lhc-collider.aspx Cern turned to the expertise of the DSBT to create a heat exchanger for the HL-LHC collider. This exchanger represents a technical feat in terms of compactness and performance, leading the CERN to commission the DSBT to carry out optimization, industrialization and cold tests with a view to installing exchangers in the superconducting magnets and then in the LHC tunnel by 2022. Cryogenics ; Particle physics ; Particle accelerator general public ; Journalists ; Researchers IRIG Scientific result ; International Mon, 16 Dec 2019 11:00:00 GMT A step forward in the exploration of the fission process at GANIL https://www.cea.fr/drf/english/Pages/News/Scientific-results/2019/a-step-forward-in-the-exploration-of-the-fission-process-at-ganil.aspx For the first time, a team of researchers was able to measure and accurately identify daughter nuclei produced by the fission of uranium-239 fission. This was made possible by the unique combination of GANIL equipment and beams. It is published in the Physical Review Letter*. Nuclear physics ; Tools & research instruments ; Particle accelerator general public ; Journalists ; Researchers Ganil Scientific result Fri, 13 Dec 2019 11:00:00 GMT Fukushima: lessons learnt from an extraordinary case of soil decontamination https://www.cea.fr/drf/english/Pages/News/Scientific-results/2019/Fukushima-lessons-learnt-from-an-extraordinary-case-soil-decontamination.aspx Following the accident at the Fukushima nuclear power plant, in 2011, the Japanese authorities decided to carry out major decontamination works in the affected area. The EGU is publishing a synthesis of approximately sixty scientific publications that together provide an overview of the decontamination strategies used and their effectiveness. Environment ; Radioactivity ; Nuclear energy Companies ; general public ; Institutions ; Journalists ; Researchers LSCE Scientific result Thu, 12 Dec 2019 11:00:00 GMT The FRESCA2 project ends on a high note with a magnetic field record of 14.6 Teslas at 1.9 Kelvin https://www.cea.fr/drf/english/Pages/News/Scientific-results/2020/the-fresca-project-ends-on-a-high-note-with-a-magnetic-field-record-of-14-6-t.aspx After winding, the seventh and last coil of FRESCA2 left Saclay in June 2019 in its reaction mould, putting an end to Irfu's activity on this project, which began in 2009 in collaboration with CERN. This type 3-4 coil is a spare coil, which, after reaction, instrumentation and impregnation at CERN, will join its type 1-2 sister on CERN shelves. Tools & research instruments ; Particle accelerator ; Technologies general public ; Journalists ; Researchers Irfu Scientific result Tue, 19 Nov 2019 11:00:00 GMT Fukushima: a French soil decontamination process experimented in Japan https://www.cea.fr/drf/english/Pages/News/Scientific-results/2018/Fukushima-a-French-soil-decontamination-process-experimented-in-Japan.aspx The CEA, Orano and Veolia tested out a radioactive soil decontamination process in Japan between 13 and 17 November 2017. Radioactivity ; Environment Companies ; Partners ; Suppliers ; general public ; Institutions ; Journalists ; Researchers ; Higher education DRF Press release ; Focus Wed, 11 Apr 2018 10:00:00 GMT Perfect harmony between carbon-14 dating and antique music https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/perfect-harmony-between-carbon14-dating-and-antique-music.aspx Fifteen musical instruments from ancient Egypt were dated by measuring their carbon-14 levels in the Carbon-14 Measurement Laboratory associated with the LSCE (Saclay). They will be exhibited at the Louvre-Lens museums until January 15, 2018, among four hundred objects that bring back to life more than three thousand years of music from the great ancient civilizations (Egypt, the Orient, Rome, Greece). Mass spectrometry ; Particle accelerator Researchers ; general public ; Journalists LSCE Scientific result Mon, 13 Nov 2017 11:00:00 GMT Record Field Intensity in a High Temperature Dipole Magnet https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/record-field-intensity-in-a-high-temperature-dipole-magnet.aspx A dipole magnet, built by a European collaboration involving IRFU from high-temperature superconductors, has produced a 4.5 tesla magnetic field, which is one tesla higher than previous prototypes. Once inserted in a Niobium-Tin dipole magnet, the whole system will produce an 18 T field. Particle accelerator Researchers ; general public ; Journalists Irfu Scientific result Wed, 08 Nov 2017 11:00:00 GMT FRESCA2, a Magnet to Test Other Magnets https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/FRESCA2-a-Magnet-to-Test-Other-Magnets.aspx Designed to equip the FRESCA2 testing station at CERN (Facility for the Reception of Superconducting Cables), the niobium-tin dipole magnet of the same name has reached a record 13.3 T magnetic field for a 100 mm aperture. It was designed and developed as part of a collaboration between IRFU and CERN. The objective is a magnetic-field homogeneity 1% over a length of 540 mm. Particle accelerator Researchers ; general public ; Journalists Irfu Scientific result Mon, 06 Nov 2017 11:00:00 GMT IRFU’s In-Kind Contributions to ESS Delivered https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/irfus-in-kind-contributions-to-ess-delivered.aspx In March 2017, following a series of successful tests, IRFU has delivered its in-kind contributions to the European Spallation Source (ESS) project in Lund, Sweden: an optical diagnostic and an emittance-meter to control the purity and vergence of the proton beam (under the responsibility of IRFU). Under construction since 2013, the spallation source is expected to enter service in 2019. It will be nearly one hundred times more intense than current sources. Particle accelerator Researchers ; general public ; Journalists Irfu European & international partnerships ; Highlight ions;diagnostics;spallation;neutrons; Sat, 27 May 2017 10:00:00 GMT First Observation of Light-by-light Scattering at the LHC https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/first-observation-of-light-by-light-scattering-at-the-lhc.aspx Light-by-light scattering, predicted in 1936, was observed for the first time by the ATLAS experiment at the LHC, thanks to “ultra-peripheral” collisions of lead ions. It is of particular interest to physicists, as it is the result of interactions between a vacuum and intense electromagnetic fields. Tools & research instruments ; Simulation & modelling ; Particle accelerator general public ; Journalists ; Researchers Irfu Scientific result Thu, 16 Mar 2017 11:00:00 GMT The Mystery of Cosmological Lithium Remains Unsolved https://www.cea.fr/drf/english/Pages/News/Scientific-results/2017/the-mystery-of-cosmological-lithium-remains-unsolved.aspx The deficit in lithium observed in the early universe is not explained by the poor understanding of a nuclear reaction involving beryllium-7. Tools & research instruments ; Particle accelerator general public ; Journalists ; Researchers Irfu Scientific result Wed, 18 Jan 2017 11:00:00 GMT