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20. September 2017 11:00

Comparative tomography of the Soufrière de Guadeloupe volcano with cosmic muons

Farzad Hosseini
IPNL, Lyon, France

The subject of this work is the cosmic muon tomography of geological structures, an area that was born of the encounter between two scientific disciplines: particle physics and geosciences. It was an internship within the framework of the DIAPHANE project which is committed to tomography of the Soufrière of Guadeloupe which is an active volcano. An internship supervised by Jacques Marteau at the Lyon nuclear physics institute. We use the attenuation of the flow of muons in the dome to characterize its spatial distribution of matter: the larger and / or dense the dome is, the lower the flow of muons would be and vice versa. For example, a cavity in a homogeneous medium is translated for the instrument by an increase in the flow of muons at the axes of observation which pass through the cavity. We looked at the distribution of energy deposited in each matrix of telescope to select the right events and also the distribution of the muon flux along different channels in 2 d and 3 d. Finally an image of tomography was obtained where one can distinguish the different densities and structures. We have also compared the results of two phases for one of the sites around the Soufriere and verified and confirmed the relevance between them with different analyzes.