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17-20 avril 2012
Chapelle des Cordeliers
Europe/Paris timezone
Accueil > Contribution List

Liste des présentations

Affichage61 contributions sur 61
Type: Oral Session: Applications of muon imaging in geophysics, archeology, civil and industrial engineering
Thématique: Applications of muon imaging in civil and industrial engineering
A novel geophysical imaging method using muon tomography is being developed for mineral exploration. This nondestructive technique, similar in principle to computed tomography, can be used to identify massive ore bodies underground. A proof-of-concept trial has been conducted using a known volcanic massive sulfide deposit at Mt. Myra located on Vancouver Island in British Columbia. Muon flux dat ... Plus
Présenté par Zhiyi LIU on 19 avr. 2012 à 14:00
Session: Volcanology
Présenté par Pf. Dominique GIBERT on 18 avr. 2012 à 17:25
Session: Volcanology
Présenté par Prof. Paolo Emilio STROLIN on 18 avr. 2012 à 17:15
Session: Volcanology
Présenté par Prof. Hiroyuki TANAKA on 18 avr. 2012 à 17:05
Type: Oral Session: Atmospheric Muons and Neutrinos
Thématique: Earth and Planetary Science with muons and neutrinos
Primary cosmic-protons and nuclei interact in the atmosphere and produce cascades of secondary hadrons, some of which decay to produce muons and neutrinos. Production of pions, kaons and other hadrons occurs at the level of nucleon-nucleon interactions. For example, the excess of positive muons is a consequence of the excess of protons over neutrons in the primary spectrum of cosmic-ray nucleons ... Plus
Présenté par Thomas GAISSER on 19 avr. 2012 à 09:20
Type: Oral Session: Atmospheric Muons and Neutrinos
Thématique: Earth and Planetary Science with muons and neutrinos
At sea level the flux of charged particles is dominated by muons, which originated by the decay of mesons produced by the interactions of primary cosmic rays at the top of the atmosphere. Due to their relative stability and small cross sections, these particle are able to arrive deep under-ground, -water or -ice. As a consequence, their penetration properties opens the possibility of radiography ... Plus
Présenté par Prof. maurizio SPURIO on 19 avr. 2012 à 09:50
Type: Oral Session: Atmospheric Muons and Neutrinos
Thématique: Earth and Planetary Science with muons and neutrinos
The main source of background for the radiography of volcanoes with atmospheric muons comes from the accidental coincidences produced in the telescopes by the atmospheric showers. In order to quantify this background, the showers were investigated using two MonteCarlo packages, Corsika[1] and Geant4[2]. The talk will describe the simulation chain and give very preliminary results on the shower t ... Plus
Présenté par M. Samuel BÉNÉ on 19 avr. 2012 à 11:30
Type: Oral Session: Technical developments for muon and neutrino imaging
Thématique: Technical developments for muon and neutrino imaging
The REGARD group (Eötvös Loránd University and Wigner RCP RMI collaboration for R&D of gaseous detectors) developed a portable detector for environmental application: searching for large scale underground rock/soil inhomogenities [1]. The designed muontomograph is based on the newly developed Closed Cathode Chamber (CCC) technology [2], which provide an cheap, easy handling, portable, high-reso ... Plus
Présenté par Mr. László OLÁH on 19 avr. 2012 à 17:30
Type: Oral Session: Volcanology
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
Guadeloupe Island (West French Indies) is one of the twenty islands that compose the Lesser Antilles Arc, which results from the subduction of the Atlantic Ocean plate beneath the Caribbean one. The island lies in a complex volcano-tectonic system and the need to understand its geological context has led to numerous on- and offshore geophysical investigations. This work presents the compilation an ... Plus
Présenté par Mlle. Lydie GAILLER on 18 avr. 2012 à 10:00
Type: Oral Session: Volcanology
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
We present density radiographies obtained for the Soufrière of Guadeloupe lava dome, both in the North-South and East-West planes. These radiographies reveal the highly heterogeneous density structure of the volcano, with low-density regions corresponding to recognized hydrothermally altered areas. The main structures observed in the density radiographies correlate with anomalies in electrical re ... Plus
Présenté par Prof. Dominique GIBERT on 18 avr. 2012 à 14:00
Type: Poster Session: Poster Session
Thématique: Technical developments for muon and neutrino imaging
We will present a real-time monitoring system for cosmic-ray muon radiography as an application of a readout module developed by T. Uchida et al [1,2]. The readout module was developed originally for probing the internal structure of volcanoes in 2008 [3]. Its features are small in size, low power consumption, and the capability to access remotely via Ethernet. The current statistics data of cosmi ... Plus
Présenté par Mr. Taro KUSAGAYA on 18 avr. 2012 à 09:00
Type: Poster Session: Poster Session
Thématique: Applications of muon imaging in civil and industrial engineering
A research for high level radioactive waste disposal should investigate geological structure and saturation change of rock mass around a disposal cavern. In the CO2 geological storage and the underground storage of crude oil, natural gas or liquefied petroleum gas (LPG), it is necessary to monitor an upward migration of a gaseous fluid which is stored in underground. For an investigation of slope ... Plus
Présenté par M. Hiroshi SUENAGA on 18 avr. 2012 à 09:00
Type: Poster Session: Poster Session
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
We have developed a method of analyzing gravity and muon-radiographic data for resolving a three-dimensional density structure of a volcano. In the method, we search for a density structure that explains the muon and gravity data by using a linear inversion scheme. As a demonstration, we applied this method to Mt. Showa-Shinzan lava dome, Hokkaido, Japan. At this site, muon observation has alrea ... Plus
Présenté par Mr. Ryuichi NISHIYAMA on 18 avr. 2012 à 09:00
Type: Poster Session: Poster Session
Thématique: Applications of muon imaging in civil and industrial engineering
The Fukushima Daiichi nuclear disaster is a series of equipment failures and nuclear meltdowns, following the T¯ohoku earthquake and tsunami on 11 March 2011. We present a new method for visualizing nuclear reactors. Muon radiography based on the multiple Coulomb scattering of cosmic-ray muons has been performed. In this work, we discuss experimental results obtained with a cost-effective simp ... Plus
Présenté par Prof. Hiroyuki TANAKA, Dr. Kuniyoshi TAKAMATSU on 18 avr. 2012 à 09:00
Type: Oral Session: Technical developments for muon and neutrino imaging
Thématique: Technical developments for muon and neutrino imaging
Glass Resistive Plate Chambers (GRPC) are excellent candidates to study volcanoes structure. They provide high efficiency and excellent homogeneity to detect the muons crossing the volcanoes. Few chambers of 1m2 equipped with an embedded readout electronics of 1 cm2 segmentation that were developed to be the active medium of a sampling hadronic calorimeter proposed for the future Internation ... Plus
Présenté par Mr. imad LAKTINEH on 19 avr. 2012 à 16:50
Type: Oral Session: Volcanology
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
Muon radiography of volcanoes aims at estimating the density of rocks constituting the volcanic edifice from muon fluxes. Earthquake tomography aims at estimating the seismic velocity of the same rocks from the travel times of seismic waves. Muon radiography and earthquake tomography are inverse problems that share some similar features - muon flux variation and travel time may be both written as ... Plus
Présenté par Prof. Jean-Luc GOT on 18 avr. 2012 à 09:20
Présenté par Dr. Andrea RUSSO on 17 avr. 2012 à 14:10
Type: Oral Session: Volcanology
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
We have investigated the dynamics of volcanic explosive eruptions, from the sub-surface source mechanisms through to the surface emission dynamics. To this end, we carried out a cross-correlation of broadband seismic data and ground-based Doppler radar data (VOLDORAD) recorded at Arenal (Costa Rica). Arenal is a small stratovolcano ca. 1.1 km in height, characterized by a mildly-explosive activity ... Plus
Présenté par Dr. Sebastien VALADE on 18 avr. 2012 à 09:40
Présenté par Dr. Cristina CARLOGANU on 17 avr. 2012 à 14:40
Type: Oral Session: Atmospheric Muons and Neutrinos
Thématique: Earth and Planetary Science with muons and neutrinos
Electron anti-neutrinos produced by natural radioactivity inside the Earth - geoneutrinos - can be used as a unique direct probe in order to determine the amount of long-lived radioactive elements inside our planet and to constrain the radiogenic contribution to the terrestrial heat. The composition of the Earth's interior, the heat sources driving the mantle convection, the generation of the Eart ... Plus
Présenté par Dr. Livia LUDHOVA on 19 avr. 2012 à 10:20
Type: Oral Session: Atmospheric Muons and Neutrinos
Thématique: Earth and Planetary Science with muons and neutrinos
The quantitative interpretation of the imaging of large structures using the atmospheric muon flux depends on the details of the muon energy spectrum and angular distribution, on the model describing the interaction of the muons with the medium inside those structures, in particular the muon absorption and diffusion, as well as on the detector resolution. The impact of such parameters will be disc ... Plus
Présenté par Dr. Bogdan VULPESCU
Type: Oral Session: Volcanology
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
Muon imagery of volcanoes and other types of geological structures is presently actively developed by several groups in the world. It has the potential capability to provide the 2D or 3D distribution of density with an accuracy of a few percent. However, at this stage of the development of the method, comparisons with the results from established geophysical methods are necessary to validate its r ... Plus
Présenté par Mlle. Angélie PORTAL on 18 avr. 2012 à 11:30
Session: Tomographic reconstruction methods
Thématique: Inverse problem in Appplied Mathematics
Electrical Impedance Tomography (EIT) is a non-invasive, low cost technology developed to image the electrical conductivity distribution of a conductive medium. The technique works by performing simultaneous measurements of electric currents and voltages on the boundary of an object. These are the data used by an image reconstruction algorithm to determine the electrical conductivity distribution ... Plus
Présenté par Dr. CRISTIANA SEBU on 20 avr. 2012 à 09:25
Type: Oral Session: Volcanology
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
The island of La Réunion (Indian Ocean) is a large oceanic volcanic system of which most of the volume is submerged. We present a study of its internal structure using geophysical methods. Subaerial and marine gravity and magnetic measurements have been compiled with terrestrial-based electromagnetic surveys. Geophysical models have been constructed using geological constraints and results from p ... Plus
Présenté par Ms. Lydie GAILLER on 18 avr. 2012 à 10:20
Type: Poster Session: Poster Session
Thématique: Applications of muon imaging in civil and industrial engineering
Introduction The technology that enables us to observe the internal structure of a volcano and the city foundation is being developed by utilizing the muon’s significant penetration power. From the possibility to use this technology for the surveillance inside a large-scale civil engineering structure, we are planning an experimental measurement. General Instruction A final target is safety ... Plus
Présenté par Dr. Akira SANNOMIYA on 18 avr. 2012 à 09:00
Présenté par Prof. Hiroyuki TANAKA on 20 avr. 2012 à 09:00
Type: Oral Session: Tomographic reconstruction methods
Thématique: Inverse problem in Appplied Mathematics
Iterative reconstruction in tomography, based on inverse problems approaches, have long proven their potential to enhance reconstruction quality, compared to the filtered backprojection (FBP). The drawback of iterative methods is their expensive computation time. However ongoing researches on algorithms and recent enhancements in computational power, call for a re-evaluation of the potential of it ... Plus
Présenté par M. Fabien MOMEY on 20 avr. 2012 à 10:50
Type: Oral Session: Volcanology
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
Ngauruhoe (2287 m high) was New Zealand’s most active volcano for over a century until 1975, when after a series of Vulcanian eruptions, it became quiescent. It is a steep conical volcano, which had an open vent about 200 metres deep in late 1973, which has since filled up. It is important in considering the hazard of future eruptions, and in interpreting any possible eruption precursors, to kno ... Plus
Présenté par Dr. Tony HURST on 18 avr. 2012 à 15:20
Type: Oral Session: Tomographic reconstruction methods
Thématique: Inverse problem in Appplied Mathematics
Physical effects degrading the quality of reconstructed medical images have been corrected during a while using analytical methods, applied to projections or directly to reconstructed images but those methods are still aproximative. An alternative approach is to correct those effects using iterative methods during the reconstruction of images.vThe principal is to model the physical and technologi ... Plus
Présenté par Dr. Lydia MAIGNE on 20 avr. 2012 à 12:05
Type: Oral Session: Volcanology
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
The improvements of automated scanning systems have produced an impressive revival of the nuclear emulsion technique, thus allowing their large scale application in particle physics experiments. The portability of a nuclear emulsion based detector makes it well suitable also for the muon radiography of internal structures of volcanoes. We present the application of this technique to the study of ... Plus
Présenté par Dr. Andrea RUSSO on 18 avr. 2012 à 14:20
Type: Oral Session: Technical developments for muon and neutrino imaging
Thématique: Technical developments for muon and neutrino imaging
Resistive Plate Chambers are widely used in high energy physics experiments as reliable trigger systems due to their excellent time resolution and rate capability, while generally the track spatial information is obtained by means of different detectors. Studies show that it is possible to produce RPC with good spatial resolution (~ 0.5 mm) by appropriate choice of the pitch of the readout strips. ... Plus
Présenté par Mr. Christian THOMAY on 19 avr. 2012 à 17:10
Type: Oral Session: Atmospheric Muons and Neutrinos
Thématique: Earth and Planetary Science with muons and neutrinos
In spring of 2011, the world's largest neutrino observatory, IceCube, was completed within deep glacial ice at the South Pole. IceCube is designed to detect Cherenkov light emitted by secondary charged particles generated from high-energy neutrinos. The primary mission of IceCube is to discover the origin of cosmic neutrinos, while detailed studies of the atmospheric neutrino background have bee ... Plus
Présenté par Dr. Kotoyo HOSHINA on 19 avr. 2012 à 11:10
Type: Oral Session: Tomographic reconstruction methods
Thématique: Inverse problem in Appplied Mathematics
The purpose of the talk is to present an approach of tomographic inverse problems based on regularization by covariance type norm in a stochastic framework. By using Bochner’s characterization of definite positive functions, some useful classes of covariance kernels can be displayed, and I will indicate how to assign values to the regularization parameters through L-curve analysis. I will also g ... Plus
Présenté par Dr. Bernard VALETTE on 20 avr. 2012 à 09:50
Type: Oral Session: Technical developments for muon and neutrino imaging
Thématique: Technical developments for muon and neutrino imaging
Muon telescopes, which detect atmospheric muons produced from cosmic ray showers, are providing an invaluable tool to volcanologists the world over by imaging the cone structure of the volcanoes. An instrument of this type has been assembled in Italy by the MuRay collaboration. The MuRay telescope uses scintillator rods to detect and track atmospheric muons. One of the novelties with respect to ... Plus
Présenté par Raffaello D'ALESSANDRO on 19 avr. 2012 à 15:40
on 19 avr. 2012 à 09:00
Type: Oral Session: Technical developments for muon and neutrino imaging
Thématique: Technical developments for muon and neutrino imaging
T2DM2 SUMMARY OF OBJECTIVES AND SCIENTIFIC The aim of this project is to develop a new field of study in the geosciences, using a detector very promising and innovative coming from particle physics, applied to the temporal tomography of subsurface a few hundred meters thickness of rock. The field of applications concerns the stability of rocks, the monitoring of rheological properties, as for e ... Plus
Présenté par M. Pierre SALIN on 19 avr. 2012 à 16:30
Type: Oral Session: Applications of muon imaging in geophysics, archeology, civil and industrial engineering
Thématique: Applications of muon imaging in archeology
In 1969, Luis Alvarez ruled out the existence of an extra room in Khephren's pyramid, using a muon detector installed in the only known room, which is close to the ground level. Several studies have pointed out the possible existence of an extra room in Khufu's pyramid, which could be located below the level of known rooms. It would be detectable by modern muon detectors installed outside of t ... Plus
Présenté par Mr. Eric AUBOURG on 19 avr. 2012 à 14:20
Type: Poster Session: Poster Session
Thématique: Applications of muon imaging in civil and industrial engineering
The time resolution of dynamic muon radiography is defined by achieving the appropriate angular resolution, detection area, and cosmic ray muon flux (=70 muons/m2 sr sec). For example, at an angular resolution of 30 mrad, we need a detection area of 3.9 m2 to collect 100 muons in 8 hours for each bin. However, a space of this size in the correct position may be unavailable in an industrial plant ... Plus
Présenté par Prof. Hiroyuki TANAKA on 18 avr. 2012 à 09:00
Type: Oral Session: Tomographic reconstruction methods
Thématique: Inverse problem in Appplied Mathematics
Analytic two dimensional tomography aims at reconstructing a function from its line integrals, based on the exact inversion of the Radon operator. Until 2002 it was believed that no exact reconstruction was possible if any line integral was missing. Indeed, the reconstructions based on the FBP algorithm, used a non-local filter. Surprisingly, new results were published in 2002 (see [Clackdoyle ... Plus
Présenté par Dr. Catherine MENNESSIER on 20 avr. 2012 à 11:40
Type: Oral Session: Technical developments for muon and neutrino imaging
Thématique: Technical developments for muon and neutrino imaging
Muon imagery techniques, that use cosmic-ray muons generated in the upper atmosphere, are currently intensively being developed by several international groups to probe the internal structures of volcanic edifices to depths up to several kilometers. These techniques may be used to construct precise 3D models of rock density distribution, and, even more, its variation with time, within active volca ... Plus
Présenté par Dr. Philippe LABAZUY on 19 avr. 2012 à 18:10
Présenté par Prof. Hiroyuki TANAKA on 17 avr. 2012 à 14:20
Présenté par Fabio AMBROSINO on 17 avr. 2012 à 14:30
Session: Volcanology
Présenté par M. Jean-Luc GOT on 18 avr. 2012 à 16:45
Session: Tomographic reconstruction methods
Thématique: Inverse problem in Appplied Mathematics
SRRQ (Spinning Registration Reconstruction Quantization) is a reconstruction method alternating projections alignment and segmentation of reconstructed volume. This method reconstructs alternately and iteratively an object complying a priori constraints, and an object which some projections comply registrated projections known experimentally. A priori constraints are derived for an object to recon ... Plus
Présenté par Dr. Maxime MOREAUD on 20 avr. 2012 à 11:15
Type: Oral Session: Volcanology
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
The project TOMUVOL, aimed at developing a method for muonic tomography of volcanic edifices, has chosen the Puy de Dôme as an experimental test site. In fact, this volcano with a simple external shape has a complex internal structure that may allow testing the performances of this new method. The Puy de Dôme is a composite lava dome, about 11 ka old. It is composed of two distinct morphologica ... Plus
Présenté par Mr. Didier MIALLIER on 18 avr. 2012 à 11:10
Type: Oral Session: Technical developments for muon and neutrino imaging
Thématique: Technical developments for muon and neutrino imaging
The DIAPHANE project is dedicated to the density tomography of geological structures, focusing on active volcanoes like the ones in the Lesser Antilles belt. The aim of the project is to provide high resolution profiles, complementary to standard tomographic methods, to constrain the various evolution models of those volcanoes. In this talk we review the opto-electronics readout scheme of the tele ... Plus
Présenté par M. Claude GIRERD on 19 avr. 2012 à 15:20
Type: Oral Session: Technical developments for muon and neutrino imaging
Thématique: Technical developments for muon and neutrino imaging
KM3NeT is an international consortium involving more than 300 scientists from 10 EU countries. Its main objective is the construction of a multi-km3 high-energy neutrino telescope in the Mediterranean Sea that will also host an interdisciplinary observatory for devices dedicated to marine sciences. KM3NeT has been included in the roadmap of the European Strategy Forum of Research Infrastructures ... Plus
Présenté par Annarita MARGIOTTA on 19 avr. 2012 à 14:40
Type: Oral Session: Technical developments for muon and neutrino imaging
Thématique: Technical developments for muon and neutrino imaging
The Mediterranean Eurocentre for Underwater Sciences and Technologies (MEUST) plans to deploy a second generation deep sea cabled infrastructure offshore of Toulon, France, within the framework of the European networks of neutrino telescopes KM3NeT and deep sea observatories EMSO. The project will be presented with emphasis on the layout of the deep sea infrastructure, its regional context and its ... Plus
Présenté par Dr. Claude VALLEE on 19 avr. 2012 à 15:00
Type: Oral Session: Volcanology
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
The MU-RAY project aims at the construction of muon telescopes and the development of new analysis tools for muon radiography. The telescopes are required to be able to work in harsh environment and to have low power consumption, good angular and time resolutions, large active area and modularity. A high background suppression is required. A prototype telescope has been constructed. The detector ... Plus
Présenté par Fabio AMBROSINO on 18 avr. 2012 à 14:40
Type: Poster Session: Poster Session
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
S. Miyamoto (7), C Bozza (6), N D’Ambrosio (1), G De Lellis (4), A Di Crescenzo (4), N Di Marco (1), U Kose (5), N Naganawa (3), M Nakamura (3), R Rescigno (6), A Russo (4), H Shimizu (2), C Sirignano (1), S Stellacci (6), P Strolin (4), H Tanaka (7), and V Tioukov (4) (1) INFN , Gran Sasso, Italy, (2) SEVO, Kyushu University Japan, (3) F-lab, Nagoya University, Japan, (4) INFN, Napoli, Ital ... Plus
Présenté par Dr. Seigo MIYAMOTO on 18 avr. 2012 à 09:00
Type: Oral Session: Technical developments for muon and neutrino imaging
Thématique: Technical developments for muon and neutrino imaging
We have developed a new radiographic method to measure the time variation of the water content of the soil with soft component of air shower. Air shower produced by a primary cosmic ray consists of hard component and soft component. Hard component is mainly consists of muon, and soft components is consists of electron, positron and photon. The penetration power of soft component is weaker than th ... Plus
Présenté par Mr. Akimichi TAKETA on 19 avr. 2012 à 17:50
Type: Oral Session: Volcanology
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
High energy (10^11+ eV) atmospheric muons are a natural probe for geophysical studies. They can travel through hundreds to kilometers of rocks allowing for a radiography of the density distributions within large structures, the like mountains or volcanoes. A collaboration between volcanologists, astroparticle- and particle physicists, TOMUVOL, has been formed in 2009 to study tomographic muon imag ... Plus
Présenté par Mr. Valentin NIESS on 18 avr. 2012 à 11:50
Présenté par Fabio AMBROSINO, Dr. Cristina CARLOGANU on 17 avr. 2012 à 14:50
Type: Oral Session: Volcanology
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
We have developed a multilayer, scintillator based, segmented muon hodoscope with the capacity to create up to 8 layers. One of the most important processes of cosmic ray muon radiography is the ability to select muon trajectories with precision from simultaneously arriving, vertical electromagnetic (EM) background components. As the size of the target increases, the muon path length of the targe ... Plus
Présenté par Prof. Hiroyuki TANAKA on 18 avr. 2012 à 12:10
Type: Oral Session: Volcanology
Thématique: Applications of muon imaging in volcanology; multi-probe structure study of volcanoes
Additional strategies to modify the rapid time measurement system of muon radiography may make it possible to survey a target without knowledge of its exterior shape. Examples of such targets would be an activated volcano with a growing lava dome or the geology of extraterrestrial exploration. Established techniques of muon radiography rely on precise exterior shape data because the method excl ... Plus
Présenté par Prof. Hiroyuki TANAKA on 18 avr. 2012 à 15:40
on 19 avr. 2012 à 20:00