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Search Results: 1 - 10 of 111846 matches for " O. Guillaudin "
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MIMAC : a micro-TPC detector for non-baryonic dark matter search
F. Mayet,O. Guillaudin,D. Santos,A. Trichet
Physics , 2009, DOI: 10.1051/eas/0936037
Abstract: The MIMAC project is multi-chamber detector for Dark Matter search, aiming at measuring both track and ionization with a matrix of micromegas micro-TPC filled with He3 and CF4. Recent experimental results on the first measurements of the Helium quenching factor at low energy (1 keV recoil) are presented.
MIMAC : Detection of low energy recoils for Dark Matter search
A. Trichet,F. Mayet,O. Guillaudin,D. Santos
Physics , 2009, DOI: 10.1051/eas/0936047
Abstract: The MIMAC project is based on a matrix of Micro Time Projection Chambers (micro-TPC) for Dark Matter search, filled with He3 or CF4 and using ionization and tracks. The first measurement of the energy resolution of this micro-TPC is presented as well as its low threshold
Development of a front end ASIC for Dark Matter directional detection with MIMAC
J. P. Richer,G. Bosson,O. Bourrion,C. Grignon,O. Guillaudin,F. Mayet,D. Santos
Physics , 2009, DOI: 10.1016/j.nima.2010.04.041
Abstract: A front end ASIC (BiCMOS-SiGe 0.35 \mum) has been developed within the framework of the MIMAC detector project, which aims at directional detection of non-baryonic Dark Matter. This search strategy requires 3D reconstruction of low energy (a few keV) tracks with a gaseous \muTPC. The development of this front end ASIC is a key point of the project, allowing the 3D track reconstruction. Each ASIC monitors 16 strips of pixels with charge preamplifiers and their time over threshold is provided in real time by current discriminators via two serializing LVDS links working at 320 MHz. The charge is summed over the 16 strips and provided via a shaper. These specifications have been chosen in order to build an auto triggered electronics. An acquisition board and the related software were developed in order to validate this methodology on a prototype chamber. The prototype detector presents an anode where 2 x 96 strips of pixels are monitored.
Development and validation of a 64 channel front end ASIC for 3D directional detection for MIMAC
J. P. Richer,O. Bourrion,G. Bosson,O. Guillaudin,F. Mayet,D. Santos
Physics , 2011, DOI: 10.1088/1748-0221/6/11/C11016
Abstract: A front end ASIC has been designed to equip the {\mu}TPC prototype developed for the MIMAC project, which requires 3D reconstruction of low energy particle tracks in order to perform directional detection of galactic Dark Matter. Each ASIC is able to monitor 64 strips of pixels and provides the "Time Over Threshold" information for each of those. These 64 digital informations, sampled at a rate of 50 MHz, can be transferred at 400MHz by eight LVDS serial links. Eight ASIC were validated on a 2x256 strips of pixels prototype.
Quenching factor measurement in low pressure gas detector for directional dark matter search
O. Guillaudin,J. Billard,G. Bosson,O. Bourrion,T. Lamy,F. Mayet,D. Santos,P. Sortais
Physics , 2011, DOI: 10.1051/eas/1253015
Abstract: There is considerable experimental effort dedicated to the directional detection of particle dark matter. Gaseous mu-TPC detectors present the privileged features of being able to reconstruct the track and the energy of the recoil nucleus following the interaction. A precise measurement of the recoil energy is a key point for the directional search strategy. Quenching has to be taken into account, i.e. only a certain fraction of the recoil energy is deposited in the ionization channel. Measurements of the ionization quenching factor for different gas mixture at room temperature have been made with a dedicated ion beam facility at the LPSC of Grenoble.
Micromegas micro-TPC for direct Dark Matter search with MIMAC
F. Mayet,O. Guillaudin,C. Grignon,C. Koumeir,D. Santos,P. Colas,I. Giomataris
Physics , 2009, DOI: 10.1088/1742-6596/179/1/012011
Abstract: The MIMAC project is a multi-chamber detector for Dark Matter search, aiming at measuring both track and ionization with a matrix of micromegas micro-TPC filled with He3 and CF4. Recent experimental results on the first measurements of the Helium quenching factor at low energy (1 keV recoil) are presented, together with the first simulation of the track reconstruction. Recontruction of track of alpha from Radon impurities is shown as a first proof of concept.
Directional detection of Dark Matter
J. Billard,F. Mayet,J. F. Macias-Perez,D. Santos,C. Grignon,O. Guillaudin
Physics , 2010,
Abstract: Directional detection of galactic Dark Matter is a promising search strategy for discriminating genuine WIMP events from background ones. However, to take full advantage of this powerful detection method, one need to be able to extract information from an observed recoil map to identify a WIMP signal. We present a comprehensive formalism, using a map-based likelihood method allowing to recover the main incoming direction of the signal, thus proving its galactic origin, and the corresponding significance. Constraints are then deduced in the (sigma_n, m_chi) plane.
Low energy measurements with Helium Micromegas micro-TPC
O. Guillaudin,F. Mayet,C. Grignon,C. Koumeir,D. Santos,P. Colas,I. Giomataris
Physics , 2009, DOI: 10.1088/1742-6596/179/1/012012
Abstract: The measurement of the ionization produced by particles in a medium presents a great interest in several fields from metrology to particule physics and cosmology. The ionization quenching factor is defined as the fraction of energy released by ionisation by a recoil in a medium compared with its kinetic energy. At low energy, in the range of a few keV, the ionization falls rapidly and systematic measurement are needed. We have developped an experimental setup devoted to the measurement of low energy (keV) ionization quenching factor for the MIMAC project. The ionization produced in the gas has been measured with a Micromegas detector filled with Helium gas mixture.
Dedicated front-end and readout electronics developments for real time 3D directional detection of dark matter with MIMAC
O. Bourrion,G. Bosson,C. Grignon,J. P. Richer,O. Guillaudin,F. Mayet,J. Billard,D. Santos
Physics , 2011, DOI: 10.1051/eas/1253016
Abstract: A complete dedicated electronics, from front-end to back-end, was developed to instrument a MIMAC prototype. A front end ASIC able to monitor 64 strips of pixels and to provide their individual "Time Over Threshold" information has been designed. An associated acquisition electronics and a real time track reconstruction software have been developed to monitor a 512 channel prototype. This auto-triggered electronic uses embedded processing to reduce the data transfer to its useful part only, i.e. decoded coordinates of hit tracks and corresponding energy measurements. The electronic designs, acquisition software and the results obtained are presented.
Data acquisition electronics and reconstruction software for directional detection of Dark Matter with MIMAC
O. Bourrion,G. Bosson,C. Grignon,J. L. Bouly,J. P. Richer,O. Guillaudin,F. Mayet,D. Santos
Physics , 2010, DOI: 10.1016/j.nima.2010.07.035
Abstract: Directional detection of galactic Dark Matter requires 3D reconstruction of low energy nuclear recoils tracks. A dedicated acquisition electronics with auto triggering feature and a real time track reconstruction software have been developed within the framework of the MIMAC project of detector. This auto-triggered acquisition electronic uses embedded processing to reduce data transfer to its useful part only, i.e. decoded coordinates of hit tracks and corresponding energy measurements. An acquisition software with on-line monitoring and 3D track reconstruction is also presented.
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