V. Fischer
A5045673590- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Nuclear physics research studies
- Nuclear Physics and Applications
- Advanced Sensor and Energy Harvesting Materials
- Organic Electronics and Photovoltaics
- Analytical Chemistry and Sensors
- Atomic and Molecular Physics
- Scheduling and Optimization Algorithms
- Thin-Film Transistor Technologies
- Embedded Systems Design Techniques
- Conducting polymers and applications
- Atomic and Subatomic Physics Research
- Advanced NMR Techniques and Applications
- Simulation Techniques and Applications
- Radiation Therapy and Dosimetry
- Induction Heating and Inverter Technology
- Copper Interconnects and Reliability
- Advanced Memory and Neural Computing
- Gas Sensing Nanomaterials and Sensors
- Semiconductor materials and devices
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2012-2024
Université Grenoble Alpes
2003-2024
CEA Grenoble
2023-2024
Fermi National Accelerator Laboratory
2022-2024
CEA LETI
2023-2024
Direction de la Recherche Technologique
2023-2024
Iowa State University
2022-2023
Institut de Recherche sur les Lois Fondamentales de l'Univers
2012-2022
Université Paris-Saclay
2022
CEA Paris-Saclay
2015-2022
We present a comprehensive review of keV-scale sterile neutrino Dark Matter, collecting views and insights from all disciplines involved - cosmology, astrophysics, nuclear, particle physics in each case viewed both theoretical experimental/observational perspectives. After reviewing the role active neutrinos physics, we focus on context Matter puzzle. Here, first motivation for based challenges tensions purely cold scenarios. then round out discussion by critically summarizing known...
The Double Chooz experiment presents improved measurements of the neutrino mixing angle θ 13 using data collected in 467.90 live days from a detector positioned at an average distance 1050 m two reactor cores nuclear power plant. Several novel techniques have been developed to achieve significant reductions backgrounds and systematic uncertainties with respect previous publications, whereas efficiency $$ {\overline{\nu}}_e signal has increased. value is measured be sin2 2θ = 0.090 − 0.029 +...
The RENO experiment recently reported the disappearance of reactor electron antineutrinos consistent with neutrino oscillations, a significance 4.9 standard deviations. published ratio observed to expected number in far detector is R=0.920 +-0.009(stat.) +-0.014(syst.) and corresponds sin^2 2theta13 = 0.113 +-0.013(stat.) +-0.019(syst), using rate-only analysis. In this letter we reanalyze data find R=0.903 +-0.01(stat.), leading 0.135. Moreover show that measurement still depend prompt high...
Abstract New developments in liquid scintillators, high-efficiency, fast photon detectors, and chromatic sorting have opened up the possibility for building a large-scale detector that can discriminate between Cherenkov scintillation signals. Such could reconstruct particle direction species using light while also having excellent energy resolution low threshold of scintillator detector. Situated deep underground, utilizing new techniques computing reconstruction, this achieve unprecedented...
The Double Chooz experiment has determined the value of neutrino oscillation parameter $\theta_{13}$ from an analysis inverse beta decay interactions with neutron capture on hydrogen. This uses a three times larger fiducial volume than standard assessment, which is restricted to region doped gadolinium (Gd), yielding exposure 113.1 GW-ton-years. data sample used in this distinct that Gd analysis, and systematic uncertainties are also largely independent, some exceptions, such as reactor flux...
Abstract The next core-collapse supernova in the Milky Way or its satellites will represent a once-in-a-generation opportunity to obtain detailed information about explosion of star and provide significant scientific insight for variety fields because extreme conditions found within. Supernovae our galaxy are not only rare on human timescale but also happen at unscheduled times, so it is crucial be ready use all available instruments capture possible from event. first indication potential...
The SNO+ experiment is located 2 km underground at SNOLAB in Sudbury, Canada. A low background search for neutrinoless double beta (0νββ) decay will be conducted using 780 tonnes of liquid scintillator loaded with 3.9 natural tellurium, corresponding to 1.3 130Te. This paper provides a general overview the experiment, including detector design, construction process plants, commissioning efforts, electronics upgrades, data acquisition systems, and calibration techniques. collaboration reusing...
Originally designed as a new nuclear reactor monitoring device, the Nucifer detector has successfully detected its first neutrinos. We provide second-shortest baseline measurement of neutrino flux. The detection electron antineutrinos emitted in decay chains fission products, combined with core simulations, provides tool to assess both thermal power and fissile content whole could be used by International Agency for Atomic Energy enhance safeguards civil reactors. Deployed at only 7.2 m away...
The Double Chooz collaboration presents a measurement of the neutrino mixing angle θ 13 using reactor $$ \overline{\nu_{\mathrm{e}}} observed via inverse beta decay reaction in which neutron is captured on hydrogen. This based 462.72 live days data, approximately twice as much data previous such analysis, collected with detector positioned at an average distance 1050 m from two cores. Several novel techniques have been developed to achieve significant reductions backgrounds and systematic...
We present a search for Lorentz violation with 8249 candidate electron antineutrino events taken by the Double Chooz experiment in 227.9 live days of running. This analysis, featuring sidereal time dependence events, is first test invariance using reactor-based source. No variation data and disappearance results are consistent independent oscillations. Under Standard-Model Extension, we set limits on 14 violating coefficients associated transitions between tau flavor, two competitive muon flavor.
Large‐area electronics for applications in environments with radioactive contamination or medical X‐ray detectors require materials and devices resistant to continuous ionizing radiation exposure. Here the superior hardness of oxide thin film transistors (TFTs) based on gallium‐indium‐zinc is demonstrated, when compared organic ones. In experiments both TFTs are subjected their performances monitored as a function total dose. Flexible maintain constant mobility 10 cm 2 V −1 s even after...
In this paper we present the development of enhanced printed temperature sensors on large area flexible substrates . The process flow is a fully screen technology that uses exclusively solution-processed materials. These Screen are based resistive pastes integrated in Wheatstone bridge circuit Substrate commercial Poly Ethylene Naphtalate (PEN) with thickness 125 µm. Functional demonstrated and characterized good electrical properties, showing sensitivity 0.06 V/°C at V =4.8 V. This by...
The oscillation results published by the Double Chooz Collaboration in 2011 and 2012 rely on background models substantiated reactor-on data. In this analysis, we present a background-model-independent measurement of mixing angle θ13 including 7.53 days reactor-off A global fit observed antineutrino rates for different reactor power conditions is performed, yielding both total rate. are improved significantly data fit, as it provides direct This rate modulation analysis considers candidates...
A measurement of the $^{8}\mathrm{B}$ solar neutrino flux has been made using a 69.2 kt-day dataset acquired with $\mathrm{SNO}+$ detector during its water commissioning phase. At energies above 6 MeV is an extremely pure sample elastic scattering events, owing primarily to detector's deep location, allowing accurate relatively little exposure. In that energy region best fit background rate $0.2{5}_{\ensuremath{-}0.07}^{+0.09}\text{ }\text{...
This paper reports results from a search for nucleon decay through invisible modes, where no visible energy is directly deposited during the itself, initial water phase of $\mathrm{SNO}+$. However, such decays within oxygen nucleus would produce an excited daughter that subsequently deexcite, often emitting detectable gamma rays. A rays yields limits $2.5\ifmmode\times\else\texttimes\fi{}{10}^{29}\text{ }\text{ }\mathrm{y}$ at 90% Bayesian credibility level (with prior uniform in rate)...
The R&D mission of the Accelerator Neutrino Neutron Interaction Experiment (ANNIE) is described in detail. ANNIE is: (1) an important measurement neutrino-nucleus interactions focusing specifically on neutron production, and (2) effort focused using new photodetector technology chemical additives to make advanced water-base neutrino detectors. experiment consists a small Water Cherenkov detector, instrumented with both conventional photomultiplier tubes (PMTs) Large Area Picosecond...
This article describes the setup and performance of near far detectors in Double Chooz experiment. The electron antineutrinos nuclear power plant were measured two identically designed with different average baselines about 400 m 1050 from reactor cores. Over many years data taking neutrino signals extracted interactions goal measuring a fundamental parameter context oscillation, mixing angle {\theta}13. central part was main detector comprising four cylindrical volumes filled organic...
Abstract The Accelerator Neutrino Neutron Interaction Experiment (ANNIE) is a 26-ton water Cherenkov neutrino detector installed on the Booster Beam (BNB) at Fermilab. Its main physics goals are to perform measurement of neutron yield from neutrino-nucleus interactions, as well charged-current cross section muon neutrinos. An equally important focus research and development new technologies target media. Specifically, water-based liquid scintillator (WbLS) interest novel medium, it allows...
Double Chooz is unique among modern reactor-based neutrino experiments studying $\bar \nu_e$ disappearance in that data can be collected with all reactors off. In this paper, we present from 7.53 days of reactor-off running. Applying the same selection criteria as used reactor-on oscillation analysis, a measured background rate 1.0$\pm$0.4 events/day obtained. The model for accidentals, cosmogenic $\beta$-$n$-emitting isotopes, fast neutrons cosmic muons, and stopped-$\mu$ decays analysis...
Core-collapse supernovae produce an intense burst of electron antineutrinos in the few-tens-of-MeV range. Several Large Liquid Scintillator-based Detectors (LLSD) are currently operated worldwide, being very effective for low energy antineutrino detection through Inverse Beta Decay (IBD) process. In this article, we develop a procedure prompt extraction supernova location by revisiting details IBD kinematics over broad range neutrinos. Combining all current scintillator-based detector, show...
The standard three-neutrino oscillation paradigm, associated with small squared mass splittings $\ll 0.1\ \mathrm{eV^2}$, has been successfully built up over the last 15 years using solar, atmospheric, long baseline accelerator and reactor neutrino experiments. However, this well-established picture might suffer from anomalous results reported at very short baselines in some of these If not experimental artifacts, such could possibly be interpreted as existence least an additional fourth...
Since its deployment in 2009 the Blockchain technology has been getting a lot of attention research, media as well various industries. In beginning, only financial related use cases were discussed and implemented, first real life well-known implementation was Bitcoin. then many different types Blockchains evolved. However, it is still unclear what basic characteristics are how those interact to form Blockchains. With this we therefore propose taxonomy help better understanding itself guide...