The design and performance of a system for performing translational energy spectroscopy on atomic hydrogen targets is presented. Low energy highly-charged ions are produced in a recoil ion source through collisions between target gases and a heavy, fast pump beam from the EN tandem accelerator. These ions are directed through a double-focusing magnetic spectrometer which selects the desired projectile charge state. An atomic hydrogen target is produced in a thermal dissociation oven. The energy and final charge states of the product ions are determined by a double-focusing, hemispherical electrostatic analyzer. The current work concentrates on the change in energy of the projectile ions accompanying electron capture for 250 eV per charge argon projectiles.