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Design and operation of a field telescope for cosmic ray geophysical tomography

Abstract : The cosmic ray muon tomography gives an access to the density structure of geological targets. In the present article we describe a muon telescope adapted to harsh environmental conditions. In particular the design optimizes the total weight and power consumption to ease the deployment and increase the autonomy of the detector. The muon telescopes consist of at least two scintillator detection matrices readout by photosensors via optical fibres. Two photosensor options have been studied. The baseline option foresees one multianode photomultiplier (MAPM) per matrix. A second option using one multipixel photon counter (MPPC) per bar is under development. The readout electronics and data acquisition system developed for both options are detailed. We present a first data set acquired in open-sky conditions compared with the muon flux detected across geological objects.
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N. Lesparre, J. Marteau, Y. Déclais, Dominique Gibert, B. Carlus, et al.. Design and operation of a field telescope for cosmic ray geophysical tomography. Geoscientific Instrumentation, Methods and Data Systems, European Geosciences Union 2012, 1, pp.33-42. ⟨10.5194/gi-1-33-2012⟩. ⟨insu-00814367⟩

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