Division of Electronics, Detectors and Computing for Physics (DEDIP)

Atlas in numbers

Links and documents

BABAR

Goal The main goal of the experiment was to perform a complete study of CP violation (CP is the symmetry linking particules and antiparticules) in the system of B mesons. More generally the experiment studied the physics of heavy flavors: mesons and baryons with a b or a c quark and tau leptons.

Experimental technics

News from the experiment

BAO

Most of the content of the Universe, about 70%, is dominated by an energetic component that is neither matter nor radiation: dark energy. This mysterious component, first observed in 1998 with supernovae, revolutionized our vision of the evolution of the Universe and is one of the major discoveries of the end of the 20th century. A characteristic scale of about 500 million light-years, acting as a "standard meter", is present in the distribution of matter on a cosmic scale.

BTD (Beam Tracking Detector)

Project context The BTD project was developed in the framework of experiments aiming at the spectroscopy studies of radioactive nuclei using gamma-radiation and light particles in GANIL, mainly with SPIRAL and then SPIRAL2 beams. The purpose of these experiments is to study the structure of exotic nuclei in order to better understand the interactions that bind protons and neutrons and their reactions to different excitation modes (temperature, spin...).

CaLIPSO

Positron emission tomography (PET) is a powerful nuclear imaging technique used widely nowadays in oncology, cardiology and neuropsychiatry. The PET technology consists in injecting the patient with a radioactive tracer, of interest to probe a biochemical process. The decay of the tracer emits a positron which annihilate with an electron. As a result of the annihilation, two photons with energy 511 keV are emitted back-to-back and registered by the dedicated detectors.

CASSINI-CIRS

CASSINI-CIRS An infrared spectrometer of the CASSINI probe The Composite InfraRed Spectrometer (CIRS for "Composite InfraRed Spectrometer") is one of the instruments on board the Cassini probe. The Cassini probe was inserted in orbit around Saturn on July 2004, six and half years after its launch.

CHAOS

Étude des binaires X et de leur comportement multi-longueur d'onde sur différentes échelles de temps. Studying the multi-wavelenght behavior of the X-ray binaries on multiple time scales.

CHyMENE

The CHyMENE project (Cible d'Hydrogène Mince pour l'Etude des Noyaux Exotiques - a thin cryogenic target for the studies of exotic nuclei) is part of the instrumentation necessary for the exploitation of the low energy beams (~ 5 to 25 MeV/n), such as SPIRAL2 beams. The aim is to develop a thin cryogenic target of pure hydrogen (H2 or D2), the characteristics of which will be well adapted to the conditions of future direct reaction experiments.

CLAS12

Deeply Virtual Compton Scattering experiment at Jefferson Lab Hall B , with CLAS12, large acceptance spectrometer. Goals: Theoretical concepts as Generalized Parton Distributions (GPD), enable to probe with a dramatic accuracy the nucleon structure, and access the quark confinement in hadrons.

CLAS12-Tracker

PARTONS ANR Project

CLIC: CTF3-CALIFES

Objectives The scientific exploitation of the LHC (Large Hadron Collider), planned to start operation in 2008 will be the higher priority in high energy physics for the next coming years. In the following step new large instruments will be required to reach a fine characterization of LHC discoveries, and analyse new phenomena around the TeV scale. The energy required (probably a few TeV), will be precised by the first results of the LHC, i.e. about 2010.

CMS

CMS is the detector of one of the 2 multi-purpose experiments out of the 4 experiments located at the LHC at CERN near Geneva. CMS is installed at point 5 in Cessy. Main goals : During the last decades, research in particle physics has made tremendous progress and succeeded in validating the theoretical framework called “Standard Model”.

Phase 2 upgrades

MST mirrors for intermediate telescopes

CMS in figures

Links and docs

COAST COmputational ASTrophysics

Simulation numérique en astrophysique spécialisé dans l’activité de "calcul de haute performance". Astrophysics digital simulation for "high performance computing".

The RAMSES code

COAST COmputational ASTrophysics

Web site of the COAST project Presentation The COAST project is a DAPNIA program of high performances computing in astrophysics. It includes developments of codes, numerical methods, visualization tools, distributed databases, optimization and parallelization methods.

CTA (Cherenkov Telescope Array)

A new generation observatory to explore the high energy Universe. Une nouvelle génération d'observatoire pour explorer l'Univers à haute énergie.

The NectarCAM camera

Vidéos - CTA

D0

Presentation The D0 experiment was located at the proton-antiproton Tevatron collider at the Fermilab laboratory (Chicago, USA). There was two data taking periods: Run I from 1992 to 1996 with a center of mass energy of 1.8 TeV, and Run II from 2001 to 2011 with a center of mass energy of 1.96 TeV. Before the advent of the LHC, the Tevatron was the most energetic collider in the world and the only collider where the top quark as well as possibly a Higgs boson could be produced.

Collaboration

Intellectual Production at SPP

D0 through numbers

Detectors for linear collider

FELICE (acronym for "Future Electron LInear Collider Experiment") is a group of physicists and engineers working for the physics and detectors at the ILC (International Linear Collider). An electron-positron linear collider, with a centre-of-mass energy up to 1 TeV, has been chosen by a majority of physicists worldwide as the big project in High Energy Physics, after the commissioning of the LHC at CERN.

Double-Chooz

Scientific goals : Neutrinos are elementary particles produced abundantly in stars, in the Earth's atmosphere and in the cores of nuclear power plants. In 2006 CEA/IRFU and CNRS/IN2P3 have decided to officially launch the construction of the Double Chooz experiment. Two identical detectors are to be installed near the Chooz nuclear power plant, in the French Ardennes, at different distances from the reactors.

Série de posters décrivant l'expérience Double Chooz

Edelweiss

Objectives The goal of Edelweiss is to detect the dark matter of our Galaxy through its interactions in detectors operated in underground laboratory. The EROS experiment, searching for massive compact objects in our galaxy, showed that at most 7 % of our local missing mass could be accounted for by such objects, that is by ordinary matter.

EPISTEME

Analyser le rôle du numérique dans la construction, la diffusion et l'enseignement des connaissances en astrophysique. Analyzing the digital technologies uses to make, spread and teach astrophysics knowledge.

ESS: The European Spallation Source

The linear accelerator includes a low-energy section (E≤ 90MeV) with a Radio Frequency Quadrupole (RFQ), a Drift Tube Linac (DTL), and a high-energy section made up of superconducting cavities that are designed to accelerate protons up to 2 GeV. Superconducting cavities can be divided into three categories. The first consists of spoke cavities, operating at 352 MHz and optimized for proton beams at half the speed of light (β= v/c = 0.50), with energies between 90 MeV and 216 MeV.

EXODUNES

Caractérisation des dunes EXtra-terrestres de Mars et Titan. Characterising extra-terrestrial dunes on Mars and Titan.

ExoplANETS-A

Tools development to characterize exoplanets’ atmospheres

ExplorNova

Projet de recherche sur les processus d'innovation dans la conception et la concrétisation des « grands instruments », tels que les observatoires spatiaux. Research project about innovation process of concepting and shaping big instruments such as space telescope.

Fermi

Observatoire de la NASA dédié à l'étude du rayonnement gamma de haute énergie émis par les objets célestes. NASA space telescope studying high energy gamma-ray from space objects.

FERMI-GLAST

FERMI-GLAST GLAST successfully launched on 11th June, 2008 : see Actualités The GLAST telescope was renamed the FERMI telescope after its launch on August 26th, 2008 as a tribute to the famous Italian physicist. Fermi : the Gamma-ray Large Area Space Telescope Fermi is a NASA observatory dedicated to the study of gamma rays in the energy band between 20 MeV and 300 GeV.

Fission studies with the FALSTAFF fission fragment spectrometer

This experiment aims to provide accurate data on actinide neutron-induced fission fragment characteristics (mass distributions, kinetic energy) and neutron multiplicities in the energy range between 500 keV and 20 MeV. Those data are of particular interest for the nuclear community in view of the development of the fast reactor technology. For thermal neutron energies, a lot of fission reaction data are available. Some of them are still partial or suffer from insufficient accuracy.

Fulis rotating Target

Objectives While the heaviest element on earth is 238-uranium (with traces of Pu and Np in natural nuclear reactors) whose lifetime is 5 billion years, the last 60 years have seen the synthesis of dozens of new elements in laboratory, with shorter lifetimes. In 2007, The heaviest elements which has been named is the Darmstadtium, with 111 protons. Z=112 has also been claimed, as well as Z=113 from a japanese team.

Galsico

Résoudre la formation des galaxies : de la physique à petite échelle dans le contexte cosmologique Understanding galaxies formation: small-scale physics for cosmology.

GBAR

Aims: One of the fundamental questions of today’s physics concerns the action of gravity upon antimatter. No experimental direct measurement had been successfully performed with antimatter particles in the 2010's. CERN has thus launched a research program with the Antiproton Decelerator (AD) allowing to prepare a measurement of the effect of gravity on antihydrogen atoms. The primary aim of this experiment is to determine how antimatter reacts to gravity.

SELMA

SOPHI

Intellectual Production

Principle of the experiment

GOLF

Studying the Sun's internal structure using the measurement of its oscillation modes.

GOLF / SoHO

Global Oscillations at Low Frequencies Etude de la structure interne du Soleil Study of the internal structure of the Sun GOLF instrument on board the SoHO spacecraft. SOHO website at NASA.

Objectifs scientifiques / Scientific objectives

Publications

Hadron Form Factors

Hadron electromagnetic form factors parametrize the internal structure of hadrons, the dynamical distribution of magnetization and charge created by the inner constituents. They are considered fundamental quantities as they are a privileged background for interplay between theory and experiment.

HERSCHEL

Herschel An Infrared and Sub-millimetre Observatory The Herschel telescope is a scientific space mission developed by the European Space Agency (ESA) dedicated to observing the Universe in the infrared and sub-millimetre ranges (wavelengths between 60 et 670 µm), a window of the electromagnetic spectrum that is still largely unexplored. It measures 9 m in length, 4 m in diameter and will weigh over 3 metric tons upon launch.

HESS

H.E.S.S. Exploring the High Energy gamma ray sky H.E.S.S stands for "High Energy Stereoscopic System". This telescope system been designed and built by a large international collaboration which includes the DAPNIA as a member. This instrument is dedicated to the observation of high energy gamma ray sources with energies above a few tens of GeV.

HITOMI

La mission spatiale ASTRO-H est un observatoire X et gamma de nouvelle génération The ASTRO-H mission is a new generation observatory for x-ray and gamma-ray.

IDEE

Etudier la dynamique d'interfaces dans les équations d'évolution. Studying interface dynamics in the evolution equations.

INTEGRAL

Mission de l'Agence Spatiale Européenne pour l’exploration du ciel dans la gamme des photons gamma de basse énergie. ESA mission to explore the low energy gamma-ray sky.

ISEULT

The technique of magnetic resonance imaging (MRI) is a diagnostic tool for research and neuroscience. Its evolution led to instruments for whole body operating at very high field from 0.5 to 1.5 tesla for medical examinations and 3 to 5 tesla for research instruments. Objectives Neurospin project aims to develop a centre with 4 MRI systems: o Clinic Research : MRI 3T and 7T (Siemens) o Pre Clinic Research : MRI 17T, small aperture (Bruker) o Clinic Research : MRI 11.

ITER

Objective The objective of the ITER (« way » in latine) project is to go through the steps still necessary to enable the construction of a prototype producing electricity through nuclear fusion in the years 2050's. Context Research activities in the field of fusion: Started in 1958, the fusion activity in France has been boosted with the construction and the operation of the Tore-Supra tokamak, built in Cadarache between 1983 and 1988.

JWST

The James Webb Space Telescope (JWST) launched on 25 December 2021 is the successor of the Hubble Space Telescope. This is a NASA led mission with the participation of Europe, under the responsibility of the European Space Agency (ESA), and of Canada through the Canadian Space Agency (CSA). The telescope has a collecting area 7 times larger than that of the HST and is dedicated to observe the Universe in the infrared radiation (from 1 to 27 micrometers).

Kepler

Analyse de la dynamique stellaire (rotation) par l’asteroseismologie Stellar dymanics analysis using asteroseismology. Pour les détails sur la mission KEPLER, voir le site Kepler-NASA For details on the KEPLER mission, see the Kepler-NASA website

Les distributions de partons généralisées (GPD)

La nature de ces nouvelles fonctions Des progrès théoriques importants survenus dans les cinq dernières années permettent d'étendre considérablement la notion de distributions de partons dans un nucléon ou un méson.

LUMINEU

Neutrinoless double beta decay is a very rare nuclear transition, whose existence can provide essential information about neutrino properties like the hierarchy and the absolute mass scale. If observed, this process will prove that the lepton number conservation law can be violated and that we need to extend the Standard Model.

Key numbers

Links and documents

M2C Project

Tester le modèle Lambda matière noire froide pour l'évolution de la matière noire dans les amas de galaxies. Testing the Lambda-CDM model for the formation of collapsed structures.

MagBURST

Ttitle of ERC project : Exploding stars from first principles: MAGnetars as engines of hypernovae and gamma-ray BURSTs PI : Jérôme Guilet

Magmist

Du milieu interstellaire diffus aux étoiles. From diffused interstellar medium to stars. Comprendre la formation des étoiles reste l'un des plus grands défis de l'astronomie moderne.

MagneticYSO

Title of ERC projec: Interpreting Dust Polarization Maps to Characterize the Role of the Magnetic Field in Star Formation Processes PI: Anaelle Maury

MATLAS

MATLAS étudie les galaxies précoces et leurs relations d'échelle. MATLAS studies the Early-Type Galaxies and their scale relations.

MEGACAM

Megacam MegaCam A major instrument at the CFHT observatory (Canada-France-Hawaii Telescope) The MegaCam camera was developed for the prime focus of the 3.6m diameter Canada-France-Hawaii Telescope (CFHT), on the summit of the Mauna Kea volcano, at an altitude of 4200m on the Big Island of Hawaii (USA).

Megapie

Objectives: Megapie (Megawatt pilot experiment) is an international project having as objectives to design, build, test and decomission the first lead-bismuth liquid spallation target functioning under 1 MW deposited power. This target is used as neutron source. Neutrons are produced by the interaction of high intensity proton beam (590 MeV of energy) on the target.

Mini Inca

Objectives: The objective of the Mini-INCA project is to study minor-actinide transmutation processes in high intensity thermal neutron fluxes, in view of proposing solutions to reduce the radiotoxicity of long-lived nuclear wastes. The fission process is the best way to reduce radiotoxicity and also to use the total amount of energy contain within heavy nuclei.

Experimental means and life of the QUYOS project

MINOS

Scientific Issues and Project Framework The MINOS project aims at performing the spectroscopy of very exotic nuclei produced by fragmentation at the radioactive ion beam facilities such as RIKEN or GSI / FAIR. The structure of the targeted atomic nuclei should allow us to bring strong constraints on the nuclear interaction acting between nucleons in the nucleus.

MORPHOSTAR

Contraintes morphologiques et multi-longueurs d'onde sur la croissance parallèle des galaxies et de leurs trous noirs super-massifs. Morphological and multi-wavelength constraints on the coeval growth of galaxies and their supermassive black holes.

MULTIVERSE

Etude multi-échelle de l'évolution des structures de l'Univers. Multi-scale study of the evolution of structures in the Universe.

MUSETT

A new segmented silicon-array called MUSETT has been built for the study of heavy elements using the Recoil-Decay-Tagging technique. MUSETT is located at the focal plane of the VAMOS spectrometer at GANIL and is used in conjunction with a gamma-ray array at the target position. This device consists of four 10x10 cm2 Si detectors each, to obtain a total detection area of 40 x 10 cm2.

MUST2-Reactions

Program: Nuclear matter in extreme states /Nuclear structure / exotic nuclei Objectives The goals of this experimental program is to study the structure of unstable short-lived very-neutron-rich or neutron-deficient nuclei. These nuclei far from the valley of stability are chosen for the (expected) unusual properties: neutron halo, neutron-skin, new shell effects compared to what is known for stable nuclei or close to the stability.

NIKA

NIKA (New IRAM KID Arrays): une camera continuum pour l'astronomie millimétrique. Continuum camera for milimetrical astronomy.

nTOF

Goal This activity is focused on the study of neutron-induced reactions for nuclear astrophysics (stellar and big bang nucleosynthesis), for nuclear structure (levels density) and for nuclear technologies (current and innovative nuclear reactors, transmutation of nuclear wastes). This program contributes to national and international efforts aiming at nuclear data improvement.

Experimental tools

Nuclear modelling

Thèmes-programmes: Thématique et contexte du projet In parallel with the experimental activities of the MNM group at DAPNIA/SPhN some fundamental and applied modelling takes place to simulate innovative nuclear systems for nuclear waste transmutation, intensive neutron sources based on spallation and photonuclear reactions, radioactive nuclear beam production scenarios, dismantling of nuclear installations, etc.

OPACITY

Améliorer la connaissance de l’interaction photons - plasmas dans le domaine X et XUV. Studying the photon-plasma interactions in the X-ray and XUV-ray.

Oristars

Étudier la formation des étoiles en confrontant simulations numériques et observations. Confronting star formation studies with space observations and computer simulations.

PEBBLES

The PEBBLES project consists of developing an innovative methodology to characterise the properties of dust around very young stars in the process of forming their proto-planetary disks. Dust is one of the key elements in the physical processes regulating the formation of stars and their planetary systems, but recent observations are overturning the models used until now to describe its evolution from submicron grains to pebbles.

PetaDisk

Simulations numériques de disques protoplanétaires, préparer le terrain pour la formation planétaire. Protoplanetart disks digital simulations, studying planety formation.

PHENIX

The PHENIX experiment is one of the two large experiments located on the Relativistic Heavy Ion Collider (RHIC) at the Brookhaven National Laboratory (BNL), in Long Island, United States.

PILOT

Mesurer l’émission polarisée des grains de poussière du milieu interstellaire. Measuring polarized emission of dust particles in interstellar medium.

Planck

Observatoire spatial de mesure des paramètres du modèle standard ou « modèle du Big Bang ». Space telescope measuring the Big Bang model parameters.

Plasmas lasers

Créer des plasmas à haute température à partir de l'énergie des faisceaux lasers. Making high temperature plasmas using laser energy.

PLATO

A space observatory developed by ESA for the characterization of exo-planetary systems launched in late 2026. ESA stellar exo-planet system characterization to be launched at the end of 2026.

QUYOS

Basic principle of a Solar Concentrator with Rotating Photons Optical Fibers Coming from fundamental research on solar neutrino, the Solar Quantum Concentrator( CSQ) is a future low-cost and high efficiency solution for photovoltaic solar energy. CSQ is made of a carpet bundle of Rotating Photon Optical Fibers (FORP) trapping, converting and guiding solar light towards a photovoltaic cell. A small ribbon of photovoltaic cell is put on the perimeter of the fiber carpet.

QUYOS team and collaboration

Intellectual property and awards

R3B

Goals of the experiment The R3B experiment is part of the FAIR project (Facility for Antiproton and Ion Research, http://www.gsi.de/fair) to be built at GSI (Darmstadt, Germany). The FAIR project gathers different physics around a common facility: exotic nuclei at low and high energy, hadronic physics with proton – antiproton collisions, relativistic heavy-ion collisions (a few 10 GeV per nucleon), plasma physics and atomic physics.

COCOTIER

R3B-GLAD (English)

R3B-TPC (English)

S3: Super Separator Spectrometer

The future superconducting linear accelerator of Spiral2 will provide very high intensity of stable ions beams. They can be used to produce nuclei with very low cross sections, like superheavy elements or neutron deficient nuclei close to the limit of stability. S3 has been designed to handle these intense beams and select the rare nuclei of interest among the majority of contaminants, to identify and study them.

ScanPyramids

Irfu is part of the ScanPyramids mission aiming to "scan" the great pyramids of Egypt and in particular the pyramid of Cheops. Created in 2015 under the authority of the Egyptian Ministry of Antiquities, the project combines various non-invasive and non-destructive techniques in an attempt to reveal the presence of little-known internal structures in ancient monuments and to better understand both their design and construction.

SIMBOL-X

Simbol-X A new generation space telescope for high-energy astrophysics The Simbol-X project is a new generation high energy telescope operating in the 0.5 to 80 keV energy range, using in all this domain the principle of a telescope, i.e. the concentration of the radiation on a small sensitive surface (the eye, a photographic plate, a CCD camera, etc.).

SIRIUS

The high-intensity stable beams of the superconducting linear accelerator of the SPIRAL2 facility at GANIL coupled with the Super Separator Spectrometer (S3) and a high-performance focal-plane spectrometer will open new horizons for the research in the domains of rare nuclei and low cross-section phenomena at the limit of nuclear stability.

SN2NS

Élucider le mécanisme d'explosion des étoiles massives, et caractériser les conditions de naissance des étoiles à neutrons et des trous noirs. Studying massive star explosions and neutron stars and blackholes formation.

5 lectures on Supernovae

The supernova fountain

SNLS : SuperNova Legacy Survey

SNLS aimed at detecting type Ia supernovae at high redshift for cosmological studies. It belongs to the second generation of experiments in that field, launched after the unexpected discovery of the late acceleration of the Universe expansion rate by the first programs of type Ia supernovae at the end of the1990s. SNLS used the Canada-France-Hawaii telescope (CFHT) of 3.6 m located on the Mauna Kea mountain in Hawaii. It was equipped with MegaCam, the large field CCD camera designed and built at Irfu.

Collaboration

Means of investigation

Experiment timeline

Key numbers