O. Guillaudin
A5021973019- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- CCD and CMOS Imaging Sensors
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Radiation Therapy and Dosimetry
- Scientific Research and Discoveries
- Cosmology and Gravitation Theories
- Superconducting and THz Device Technology
- Astrophysics and Cosmic Phenomena
- Boron Compounds in Chemistry
- Nuclear physics research studies
- Particle accelerators and beam dynamics
- Fractal and DNA sequence analysis
- Neutrino Physics Research
- Quantum, superfluid, helium dynamics
- Radio Astronomy Observations and Technology
- Microwave Engineering and Waveguides
- High-Energy Particle Collisions Research
- Radiation Effects in Electronics
- Advanced Thermodynamic Systems and Engines
- Blind Source Separation Techniques
- Analog and Mixed-Signal Circuit Design
Université Grenoble Alpes
2013-2025
Laboratoire de Physique Subatomique et de Cosmologie
2014-2024
Institut National de Physique Nucléaire et de Physique des Particules
2013-2024
Centre National de la Recherche Scientifique
2013-2024
Institut polytechnique de Grenoble
2010-2024
Université Joseph Fourier
2007-2016
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2016
Université Pierre Mendès France
2014
CEA Cadarache
2011
We present the case for a dark matter detector with directional sensitivity. This document was developed at 2009 CYGNUS workshop on detection, and contains contributions from theorists experimental groups in field. describe need sensitivity; each experiment presents their project's status; we close feasibility study scaling up to one ton detector, which would cost around $150M.
Abstract The New Experiments With Spheres-Gas (NEWS-G) collaboration intends to achieve sub-GeV/c 2 Weakly Interacting Massive Particles (WIMPs) detection using Spherical Proportional Counters (SPCs). SPCs are gaseous detectors relying on ionisation with a single ionization electron energy threshold. latest generation of SPC for direct dark matter searches has been installed at SNOLAB in Canada 2021. This article details the different processes involved fabrication NEWS-G experiment. Also...
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,...
The NEWS-G collaboration uses spherical proportional counters (SPCs) to search for weakly interacting massive particles (WIMPs). In this paper, we report the first measurements of nuclear quenching factor in neon gas at 2 bar using an SPC deployed a neutron beam TUNL facility. energy-dependence is modeled simple power law: $\ensuremath{\alpha}{\mathrm{E}}_{\mathrm{nr}}^{\ensuremath{\beta}}$; determine its parameters by simultaneously fitting data collected with detector over range energies....
Directional detection of non-baryonic Dark Matter is a promising search strategy for discriminating WIMP events from background ones. This requires both measurement the recoil energy down to few keV and 3D reconstruction tracks mm. The MIMAC project, based on micro-TPC matrix, filled with CF4 CHF3 being developed. first results chamber prototype this low nuclear recoils (1H 19F) obtained mono-energetic neutron fields are presented. discovery potential illustrated by realistic case accessible MIMAC.
The aim of the MIMAC project is to detect non-baryonic Dark Matter with a directional TPC using high precision Micromegas readout plane. We will describe in detail recent developments done bulk detectors as well characterisation measurements performed an Argon(95%)-Isobutane(5%) mixture. Track alpha particles be shown.
There is considerable experimental effort dedicated to the directional detection of particle dark matter. Gaseous μTPC detectors present privileged features being able reconstruct track and energy recoil nucleus following interaction. A precise measurement a key point for search strategy. Quenching has be taken into account, i.e. only certain fraction deposited in ionization channel. Measurements quenching factor different gas mixture at room temperature have been made with ion beam facility...
MIMAC (MIcro-TPC MAtrix of Chambers) is a directional WIMP Dark Matter detector project. Direct dark matter experiments need high level electron/recoil discrimination to search for nuclear recoils produced by WIMP-nucleus elastic scattering. In this paper, we proposed an original method electron event rejection based on multivariate analysis applied experimental data acquired using monochromatic neutron fields. This shows that 105 power reachable discrimination. Moreover, the efficiency was...
The project of a micro-TPC matrix chambers 3He and CF4 for direct detection non-baryonic dark matter is outlined. privileged properties are highlighted. double (ionization - projection tracks) will assure the electron-recoil discrimination. complementarity MIMAC supersymmetric search with respect to other experiments illustrated. modular character detector allows have different gases get A-dependence. pressure degreee freedom gives possibility work at high low pressures. regime...
The ionization quenching factor (IQF) is defined as the fraction of energy released by a recoil in medium through compared with its total kinetic energy. At low energies, range few keV, produced falls rapidly and systematic measurements are needed. We report carried out at such energies function pressure He4 350, 700, 1000 1300 mbar. In order to produce nucleus moving controlled detection volume, we have developed an Electron Cyclotron Resonance Ion Source (ECRIS) coupled chamber...
Directional detection of non-baryonic Dark Matter is a promising search strategy for discriminating WIMP events from neutrons, the ultimate background dark matter direct detection. This requires both precise measurement energy down to few keV and 3D reconstruction tracks mm. The MIMAC (MIcro-tpc MAtrix Chambers) collaboration has developed in last years an original prototype detector based on coupling large pixelized micromegas with special fast self-triggered electronics showing feasibility...
The Planck High Frequency Instrument (HFI) surveyed the sky continuously from August 2009 to January 2012. Its noise and sensitivity performance were excellent, but rate of cosmic ray impacts on HFI detectors was unexpectedly high. Furthermore, collisions rays with focal plane produced transient signals in data (glitches) a wide range characteristics. A study detector modules has been undertaken categorize characterize glitches, correct time-ordered data, understand residual effects maps...
Abstract This paper presents Dandelion, a new dish antenna experiment searching for dark photons (DPs) with masses around the meV that will start acquiring in 2024. A spherical mirror acts as conversion surface between DPs and standard converge to matrix of 418 Kinetic Inductance Detectors cooled down 150 mK. tilt at 1 Hz moves expected signal over pixels thus enabling continuous background reference measurement. The has two modulations: spatial modulation providing directional signature...
Directional detection of non-baryonic Dark Matter is a promising search strategy for discriminating WIMP events from background. However, this requires both precise measurement the energy down to few keV and 3D reconstruction tracks mm. To achieve goal, MIMAC project has been developed. It based on gaseous micro-TPC matrix, filled with CF4 CHF3. The first results low nuclear recoils (H, F) obtained mono-energetic neutron field are presented. discovery potential discussed illustrated by...
The amount of energy released by a nuclear recoil ionizing the atoms active volume detection appears "quenched" compared to an electron same kinetic energy. This different behavior in ionization between electrons and nuclei is described Ionization Quenching Factor (IQF) it plays crucial role direct dark matter searches. For low energies (below $50~\mathrm{keV}$), IQF measurements deviate significantly from common models used for theoretical predictions simulations. We report proton,...
The dark matter directional detection opens a new field in cosmology bringing the possibility to build map of nuclear recoils that would be able explore galactic halo giving access particle characterization such and shape halo. MIMAC (MIcro-tpc MAtrix Chambers) collaboration has developed last years an original prototype detector based on direct coupling large pixelized micromegas with devoted fast self-triggered electronics showing feasibility generation detectors. discovery potential this...
Three-dimensional track reconstruction is a key issue for directional Dark Matter detection and it requires precise knowledge of the electron drift velocity. Magboltz simulations are known to give good evaluation this parameter. However, large TPC operated underground on long time scale may be characterized by an effective velocity that differ from value evaluated simulation. In situ measurement parameter hence needed as way avoid bias in 3D reconstruction. We present dedicated method with...
Directional detection of non-baryonic Dark Matter requires 3D reconstruction low energy nuclear recoils tracks. A gaseous micro-TPC matrix, filled with either 3He, CF4 or C4H10 has been developed within the MIMAC project. dedicated acquisition electronics and a real time track software have to monitor 512 channel prototype. This autotriggered electronic uses embedded processing reduce data transfer its useful part only, i.e. decoded coordinates hit tracks corresponding measurements. An...