  A system of two microchannel-plate detectors has been successfully
implemented for tracking projectile-fragmentation beams. The detectors provide
interaction positions, angles, and arrival times of ions at the reaction
target. The current design is an adaptation of an assembly used for low-energy
beams ($\sim$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
${}^{56}$Ni beam show that the tracking system can achieve sub-nanosecond
timing resolution and a position resolution of $\sim$1 mm for beam intensities
up to $5\times10^{5}$ pps.
