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Autore/i: V. C. Antochi, G. Cavoto1,, I. A. Costa, E. Di Marco, G. D’Imperio, F. Iacoangeli, M. Marafini, A. Messina, D. Pinci, F. Renga, C. Voena, E. Baracchini, A. Cortez, G. Dho, L. Benussi, S. Bianco, C. Capoccia, M. Caponero, G. Maccarrone, G. Mazzitelli, A. Orlandi, E. Paoletti, L. Passamonti, D. Piccolo, D. Pierluigi, F. Rosatelli, A. Russo, G. Saviano, S. Tomassini, R. A. N´obrega and F. Petruci
Titolo: A GEM-based Optically Readout Time Projection Chamber for charged particle tracking
Numero: INFN-20-06/LNF
Data: 22-05-2020
PACS:
Pubblicato su:
PDF file: INFN-20-06-LNF.pdf
URL:
Abstract: The Time Projection Chamber (TPC) is an ideal candidate to track particles in a wide range of energies. Large volumes
TPCs can be readout with a suitable number of channels offering a complete 3D reconstruction of the charged particle
tracks and of their released energy allowing the identification of their mass. Moreover, He-based TPC’s are very
promising to study keV energy particles, opening the possibility for directional searches of Dark Matter (DM) and the
study of Solar Neutrinos (SN). On the other hand, in order to reach a keV energy threshold, a large number of channels is required to obtain a high granularity, that could be expensive and hard to manage.
A small prototype (named LEMOn) to test and validate an innovative read-out technique is described here. It based on the amplification of the ionization in Micro Pattern Gas Detector (MPGD) producing visible light collected by a sub-millimeter position resolution sCMOS (scientific CMOS) camera. This type of readout - in conjunction with a fast light detection - allows a 3D reconstruction of the tracks, a sensitivity to the track direction and a very promising particle identification capability useful to distinguish DM nuclear recoils from a γ-induced background.

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