M. Chapellier
A5013719422- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Quantum, superfluid, helium dynamics
- Superconducting and THz Device Technology
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Astrophysics and Cosmic Phenomena
- Advanced NMR Techniques and Applications
- Nuclear physics research studies
- Physics of Superconductivity and Magnetism
- Solid-state spectroscopy and crystallography
- Nuclear Physics and Applications
- Scientific Research and Discoveries
- Cold Atom Physics and Bose-Einstein Condensates
- High-pressure geophysics and materials
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Advanced Thermoelectric Materials and Devices
- Rare-earth and actinide compounds
- Muon and positron interactions and applications
- NMR spectroscopy and applications
- CCD and CMOS Imaging Sensors
Queen's University
2017-2025
Institut National de Physique Nucléaire et de Physique des Particules
2015-2024
Université Paris-Saclay
2012-2024
Centre National de la Recherche Scientifique
2015-2024
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2020-2024
Institut polytechnique de Grenoble
2022
Université Grenoble Alpes
2022
Université Paris-Sud
2008-2020
Campus France
2018
ADIR Association
2016
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...
The EDELWEISS-II Collaboration has completed a direct search for WIMP dark matter with an array of ten 400-g cryogenic germanium detectors in operation at the Laboratoire Souterrain de Modane. combined use thermal phonon sensors and charge collection electrodes interleaved geometry enables efficient rejection γ-induced radioactivity as well near-surface interactions. A total effective exposure 384 kg d been achieved, mostly coming from fourteen months continuous operation. Five nuclear...
The final results of the EDELWEISS-I dark matter search using cryogenic heat-and-ionization Ge detectors are presented. data sample corresponds to an increase by a factor 5 in exposure relative previously published results. A recoil energy threshold 13 keV or better was achieved with three 320 g working simultaneously over four months stable operation. Limits on spin-independent cross section for scattering weakly interacting massive particle nucleon derived from accumulated fiducial...
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...
This paper reports on the development of a technology involving $$^{100}\hbox {Mo}$$ -enriched scintillating bolometers, compatible with goals CUPID, proposed next-generation bolometric experiment to search for neutrinoless double-beta decay. Large mass ( $$\sim 1~\hbox {kg}$$ ), high optical quality, radiopure -containing zinc and lithium molybdate crystals have been produced used develop performance single detector modules based 0.2–0.4 kg bolometers. In particular, energy resolution...
Abstract CUPID-Mo is a bolometric experiment to search for neutrinoless double-beta decay ( $$0\nu \beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>0</mml:mn><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:mrow></mml:math> ) of $$^{100}\hbox {Mo}$$ xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow /><mml:mn>100</mml:mn></mml:msup><mml:mtext>Mo</mml:mtext></mml:mrow></mml:math> . In this article, we detail the detector...
The CUPID-Mo experiment at the Laboratoire Souterrain de Modane (France) is a demonstrator for CUPID, next-generation ton-scale bolometric $0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ experiment. It consists of 4.2 kg array 20 enriched ${\mathrm{Li}}_{2}$$^{100}\mathrm{Mo}{\mathrm{O}}_{4}$ scintillating bolometers to search lepton-number-violating process decay in $^{100}\mathrm{Mo}$. With more than one year operation ($^{100}\mathrm{Mo}$ exposure $1.17\text{ }\text{...
Abstract The CUPID-Mo experiment to search for 0 $$\nu \beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>ν</mml:mi> <mml:mi>β</mml:mi> </mml:mrow> </mml:math> decay in $$^{100}$$ <mml:msup> <mml:mrow /> <mml:mn>100</mml:mn> </mml:msup> Mo has been recently completed after about 1.5 years of operation at Laboratoire Souterrain de Modane (France). It served as a demonstrator CUPID, next generation experiment. was comprised 20 enriched $$\hbox {Li}_{{2}}$$...
The EDELWEISS collaboration reports on the search for Dark Matter (DM) particle interactions via Migdal effect with masses between $32$ MeV$\cdot$c$^{-2}$ to $2$ GeV$\cdot$c$^{-2}$ using a $200$ g cryogenic Ge detector sensitive simultaneously heat and ionization signals operated underground at Laboratoire Souterrain de Modane in France. phonon signal was read out Transition Edge Sensor made of NbSi thin film. biased $66$ V order benefit from Neganov-Trofimov-Luke amplification resulting...
Spherical proportional counters (SPCs) are gaseous particle detectors sensitive to single ionization electrons in their target media, with large detector volumes and low background rates. The $\mbox{NEWS-G}$ collaboration employs this technology search for low-mass dark matter, having previously performed searches at the Laboratoire Souterrain de Modane (LSM), including a recent campaign 135 cm diameter SPC filled methane. While situ calibrations of response were carried out LSM,...
A new type of radiation detector based on a spherical geometry is presented. The consists large gas volume with central electrode forming radial electric field. Charges deposited in the conversion drift to sensor where they are amplified and collected. We introduce small located at center acting as proportional amplification structure. It allows high gains be reached operates wide range pressures. Signal development absolute amplitude response consistent predictions. Sub-keV energy threshold...
The CDMS and EDELWEISS collaborations have combined the results of their direct searches for dark matter using cryogenic germanium detectors. total data set represents 614 kg.d equivalent exposure. A straightforward method combination was chosen its simplicity before were exchanged between experiments. are interpreted in terms limits on spin-independent WIMP-nucleon cross-section. For a WIMP mass 90 GeV/c^2, where this analysis is most sensitive, cross-section 3.3 x 10^{-44} cm^2 excluded at...
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...
Abstract We report the measurement of two-neutrino double-beta ( $$2\nu \beta $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>2</mml:mn><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:mrow></mml:math> ) decay $$^{100}$$ xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow /><mml:mn>100</mml:mn></mml:msup></mml:math> Mo to ground state Ru using lithium molybdate $$\hbox {Li}_2^{\;\;100}\hbox {MoO}_4$$...
Neutrinoless double beta decay (0νββ) is a yet unobserved nuclear process that would demonstrate Lepton number violation, clear evidence of beyond standard model physics. The two neutrino (2νββ) allowed by the and has been measured in numerous experiments. In this Letter, we report measurement 2νββ half-life Mo100 to ground state Ru100 [7.07±0.02(stat)±0.11(syst)]×1018 yr CUPID-Mo experiment. With relative precision ±1.6% most precise date rate Mo100. addition, constrain higher-order...
The magnetic properties of liquid $^{3}\mathrm{He}$ confined by fluorocarbon microspheres have been studied NMR in a large range fields (0.03--3 T) and between 10 800 mK. dynamics the magnetization are driven relaxation mechanisms adsorbed solid film. This is produced motion induced quantum exchange. spectral density this has deduced from measurements times liquid. exchange layer also allows transfer substrate $^{19}\mathrm{F}$ spins. Magnetic susceptibility done as function pressure...
The dispersion relations for magnetic excitons propagating on the hexagonal sites of double-hcp Pr provide clear evidence a pronounced anisotropy in exchange. energy excitations decreases rapidly as temperature is lowered, but becomes almost constant below about 7 K, agreement with random-phase-approximation calculation. No ordering has been observed above 0.4 although exchange close to critical value necessary an antiferromagnetic state.
The EDELWEISS-II Collaboration has performed a direct search for WIMP dark matter with an array of ten 400 g heat-and-ionization cryogenic detectors equipped interleaved electrodes the rejection near-surface events. Six months continuous operation at Laboratoire Souterrain de Modane have been achieved. observation one nuclear recoil candidate above 20 keV in effective exposure 144 kg d is interpreted terms limits on cross-section spin-independent interactions WIMPs and nucleons. A 1.0×10−7...
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...