Abstract
A system of two microchannel-plate detectors has been successfully implemented for tracking projectile-fragmentation beams. The detectors provide interaction positions, angles, and arrival Limes of ions at the reaction target. The current design is an adaptation of an assembly used for low-energy beams (similar to 1.4 MeV/nucleon). In order to improve resolution in tracking high-energy heavy-ion beams, the magnetic field strength between the secondary-electron accelerating foil and the microchannel plate had to be increased substantially. Results from an experiment using a 37-MeV/nucleon Ni-56 beam show that the tracking system can achieve sub-nanosecond timing resolution and a position resolution of similar to 1 mm for beam intensities up to 5 x 10(5) pps. (C) 2015 Elsevier B.V. All rights reserved,