title: New interpretations of measured antihydrogen velocities and field ionization spectra.
abstract: We present extensive Monte Carlo simulations, showing that cold antihydrogen (H) atoms are produced when antiprotons (p) are gently heated in the side wells of a nested Penning trap. The observed H with high energies, that had seemed to indicate otherwise, are instead explained by a surprisingly effective charge-exchange mechanism. We shed light on the previously measured field-ionization spectrum, and reproduce both the characteristic low-field power law as well as the enhanced H production at higher fields. The latter feature is shown to arise from H toms too deeply bound to be described as guiding center atoms, atoms with internally chaotic motion.
authors.affiliation: ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA.
authors.forename: T
authors.initials: T
authors.lastname: Pohl
authors.forename: H R
authors.initials: HR
authors.lastname: Sadeghpour
authors.forename: G
authors.initials: G
authors.lastname: Gabrielse