Experimental Study of the Positive Ion Feedback from Gas to Liquid in a Dual-Phase Argon Chamber and Measurement of the Ion Mobility in Argon Gas oleh Luciano Romero, Roberto Santorelli, Edgar Sánchez García, Thorsten Lux, Michael Leyton, Silvestro di Luise, Pablo García Abia, Rodrigo López Manzano, José Manuel Cela-Ruiz, Sebastián Quizhpi, Vicente Pesudo