A mask for high-intensity heavy-ion beams in the MAYA active target

• DOI: 10.1016/j.nima.2014.08.046
• Publication Date: 2014-09-06T16:28:50Z
• Authors: C. Rodríguez-Tajes; J. Pancin; S. Damoy; T. Roger; M. Babo; M. Caamaño; F. Farget; G.F. Grinyer; B. Jacquot; D. Pérez-Loureiro; D. Ramos; D. Suzuki
• Keywords: 03 medical and health sciences; 0302 clinical medicine; Beam mask; [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]; Active target; 530; High intensity; Heavy beam; Time-projection chamber

Abstract The use of high-intensity and/or heavy-ion beams in active targets and time-projection chambers is often limited by the strong ionization produced by the beam. Besides the difficulties associated with the saturation of the detector and electronics, beam-related signals may hide the physical events of interest or reduce the detector performance. In addition, space-charge effects may deteriorate the homogeneity of the electric drift field and distort the subsequent reconstruction of particle trajectories. In anticipation of future projects involving such conditions, a dedicated beam mask has been developed and tested in the MAYA active target. Experimental results with a 136Xe beam are presented.