A5101655197- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Superconducting and THz Device Technology
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Muon and positron interactions and applications
- Nuclear physics research studies
- Thermal Radiation and Cooling Technologies
- Radio Astronomy Observations and Technology
- Advanced Semiconductor Detectors and Materials
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Physics of Superconductivity and Magnetism
- Advanced Thermodynamics and Statistical Mechanics
- Space Science and Extraterrestrial Life
- Calibration and Measurement Techniques
- Graphite, nuclear technology, radiation studies
- Nuclear reactor physics and engineering
CEA Paris-Saclay
2015-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2015-2024
Institut de Recherche sur les Lois Fondamentales de l'Univers
2015-2024
Université Paris-Saclay
2009-2024
Centre National de la Recherche Scientifique
2008-2017
Institut National de Physique Nucléaire et de Physique des Particules
2008-2017
Université Claude Bernard Lyon 1
2017
Institute of Nuclear Physics of Lyon
2017
University of Insubria
2010-2015
Institute for Nuclear Research
2014
The EDELWEISS collaboration has performed a search for dark matter particles with masses below the GeV-scale 33.4-g germanium cryogenic detector operated in surface lab. energy deposits were measured using neutron-transmutation-doped Ge thermal sensor 17.7~eV (RMS) baseline heat resolution leading to 60~eV analysis threshold. Despite moderate lead shielding and high-background environment, first sub-GeV spin-independent limit based on target been achieved. experiment provides most stringent,...
We present the first Ge-based constraints on sub-MeV/c^{2} dark matter (DM) particles interacting with electrons using a 33.4 g Ge cryogenic detector 0.53 electron-hole pair (rms) resolution, operated underground at Laboratoire Souterrain de Modane. Competitive are set DM-electron scattering cross section, as well kinetic mixing parameter of photons down to 1 eV/c^{2}. In particular, most stringent limits for photon DM in 6 9 eV/c^{2} range. These results demonstrate high relevance detectors...
We report on a search for low-energy (E < 20 keV) WIMP-induced nuclear recoils using data collected in 2009 - 2010 by EDELWEISS from four germanium detectors equipped with thermal sensors and an electrode design (ID) which allows to efficiently reject several sources of background. The indicate no evidence exponential distribution that could be attributed WIMP elastic scattering after exposure 113 kg.d. For WIMPs mass 10 GeV, the observation one event region results 90% CL limit 1.0x10^-5 pb...
We review the physics potential of a next generation search for solar axions: International Axion Observatory (IAXO) . Endowed with sensitivity to discover axion-like particles (ALPs) coupling photons as small gaγ∼ 10−12 GeV−1, or electrons gae∼10−13, IAXO has find QCD axion in 1 meV∼1 eV mass range where it solves strong CP problem, can account cold dark matter Universe and be responsible anomalous cooling observed number stellar systems. At same time, will have enough detect lower axions...
We report on a dark matter search for Weakly Interacting Massive Particle (WIMP) in the mass range $$m_{\chi } \in [4, 30]\,\mathrm{GeV/}c^2$$ with EDELWEISS-III experiment. A 2D profile likelihood analysis is performed data from eight selected detectors lowest energy thresholds leading to combined fiducial exposure of 496 kg-days. External backgrounds $$\gamma $$ - and $$\beta -radiation, recoils $$^{206}\mathrm{Pb}$$ neutrons as well detector intrinsic were modelled outside region interest...
We make use of the EDELWEISS-III array germanium bolometers to search for electron interactions at keV scale induced by phenomena beyond Standard Model. A 90% C.L. lower limit is set on lifetime decaying invisibles, $\tau > 1.2\times 10^{24}$ years. investigate emission axions or axionlike particles (ALPs) Sun, constraining coupling parameters $g_{ae}<1.1\times 10^{-11}$ and $g_{ae}\times g_{aN}^{\rm eff} < 3.5\times 10^{-17}$ in massless limit. also directly absorption bosonic dark matter...
We present new constraints on the couplings of axions and more generic axion-like particles using data from EDELWEISS-II experiment. The EDELWEISS experiment, located at Underground Laboratory Modane, primarily aims direct detection WIMPs germanium bolometers. It is also sensitive to low-energy electron recoils that would be induced by solar or dark matter axions. Using a total exposure up 448 kg.d, we searched for axion-induced down 2.5 keV within four scenarios involving different...
The LUMINEU program aims at performing a pilot experiment on neutrinoless double beta decay of 100Mo using radiopure ZnMoO4 crystals operated as cryogenic scintillating bolometers. Growth high quality is complex task, since there are no commercial molybdenum compounds available with the required level purity and radioactive contamination. This paper discusses approaches to purify synthesize for crystal growth. A combination sublimation (with addition zinc molybdate) subsequent...
We present the results of measurements demonstrating efficiency EDELWEISS-III array cryogenic germanium detectors for direct dark matter searches. The experimental setup and FID (Fully Inter-Digitized) detector is described, as well double measurement heat ionization signals in background rejection. For whole set 24 used coincidence studies, baseline resolutions fiducial energy are mainly below 0.7 keVee (FHWM) whereas energies 1.5 (FWHM). response to nuclear recoils very good discrimination...
The physics potential of EDELWEISS detectors for the search low-mass weakly interacting massive particles (WIMPs) is studied. Using a data-driven background model, projected exclusion limits are computed using frequentist and multivariate analysis approaches, namely, profile likelihood boosted decision tree. Both current achievable experimental performances considered. optimal strategy detector optimization depends critically on whether emphasis put WIMP masses below or above...
The EURECA (European Underground Rare Event Calorimeter Array) project is aimed at searching for dark matter particles using cryogenic bolometers. proponents of the present have decided to pool their strengths and expertise build a facility house up 1000 kg detectors, EURECA, consisting in first instance germanium CaWO4 crystals. shielding will be provided through large water tank which cryostat with detectors immersed. infrastructure an essential tool community interested searches. Beyond...
The LUMINEU project is a demonstrator experiment that will search for the neutrinoless double beta decay of isotope $$^{100}$$ Mo embedded in zinc molybdate (ZnMoO $$_4$$ ) scintillating bolometers. In this context, crystal boule enriched to 99.5 % with mass 171 g was grown first time by low-thermal-gradient Czochralski technique. production cycle provided high yield (the 84 initial charge) and an acceptable level—around 4 %—of irrecoverable losses costly material. Two crystals 59 63 g,...
Random coincidence of events (particularly from two neutrino double beta decay) could be one the main sources background in search for neutrinoless decay with cryogenic bolometers due to their poor time resolution. Pulse-shape discrimination by using front edge analysis, mean-time and $\chi^2$ methods was applied discriminate randomly coinciding ZnMoO$_4$ scintillating bolometers. These can effectively rejected at level 99% analysis heat signals rise-time about 14 ms signal-to-noise ratio...
We report on the development of scintillating bolometers based lithium molybdate crystals that contain molybdenum has depleted into double-β active isotope 100Mo (Li2100deplMoO4). used two Li2100deplMoO4 cubic samples, each which consisted 45-millimeter sides and had a mass 0.28 kg; these samples were produced following purification crystallization protocols developed for search experiments with 100Mo-enriched Li2MoO4 crystals. Bolometric Ge detectors utilized to register scintillation...
Random coincidences of nuclear events can be one the main background sources in low-temperature calorimetric experiments looking for neutrinoless double-beta decay, especially those searches based on scintillating bolometers embedding promising candidate $^{100}$Mo, because relatively short half-life two-neutrino decay this nucleus. We show work that randomly coinciding double $^{100}$Mo enriched Li$_2$$^{100}$MoO$_4$ detectors effectively discriminated by pulse-shape analysis light channel...
For the first time, a cadmium tungstate crystal scintillator enriched in $$^{116}$$ Cd has been succesfully tested as scintillating bolometer. The measurement was performed above ground at temperature of 18 mK. mass 34.5 g and enrichment level $$\sim $$ 82 %. Despite substantial pile-up effect due to above-ground operation, detector demonstrated high energy resolution (2–7 keV FWHM 0.2–2.6 MeV $$\gamma range 7.5 double-beta decay transition 2813 keV), powerful particle identification...