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Particle identification with the cluster counting technique for the IDEA drift chamber.

Cuna F., Caputo C., Chiarello G., Corvaglia A., D'Anzi B., De Filippis N., Elmetenawee W., Gorini E., Grancagnolo F., Greco M., Gribanov S., Miccoli A., Jonson K., Panareo M., Popov A., Primavera M., Shuiting X., Taliercio A., Tassielli F.G., Ventura A.
Mercoledì 14/09   13:30 - 18:30   Aula B - Maria Goeppert-Mayer   I - Fisica nucleare e subnucleare
IDEA is an innovative general-purpose detector concept, designed to study electron-positron collisions in a wide energy range provided by a very large circular leptonic collider. The IDEA drift chamber is designed to provide an efficient tracking, a high-precision momentum measurement and an excellent particle identification by exploiting the application of the cluster counting technique. To investigate the potential of these techniques on physics events a simulation of the ionization clusters generation is needed. We developed an algorithm which uses the energy deposit information provided by Geant4 toolkit to reproduce the clusters number and the cluster size distribution. The results obtained confirm that the cluster counting technique allows to reach a resolution 2 times better than the ${d}E/{d}x$ method. A beam test has been performed during November 2021 at CERN to validate the simulations results and to perform a detailed study of the cluster counting technique at a fixed $\beta\gamma$. The setup will undergo a new test in July, exploiting a muon beam momentum in the relativistic rise range. The description of the simulations and the beam tests results will be presented.