title: Characterization of an atomic hydrogen source for charge exchange experiments.
abstract: We characterized the dissociation fraction of a thermal dissociation atomic hydrogen source by injecting the mixed atomic and molecular output of the source into an electron beam ion trap containing highly charged ions and recording the x-ray spectrum generated by charge exchange using a high-resolution x-ray calorimeter spectrometer. We exploit the fact that the charge exchange state-selective capture cross sections are very different for atomic and molecular hydrogen incident on the same ions, enabling a clear spectroscopic diagnostic of the neutral species.
authors.affiliation: NASA Goddard Space Flight Center, Code 662, Greenbelt, Maryland 20771, USA.
authors.forename: M A
authors.initials: MA
authors.lastname: Leutenegger
authors.affiliation: Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA.
authors.forename: P
authors.initials: P
authors.lastname: Beiersdorfer
authors.affiliation: NASA Goddard Space Flight Center, Code 662, Greenbelt, Maryland 20771, USA.
authors.forename: G L
authors.initials: GL
authors.lastname: Betancourt-Martinez
authors.affiliation: Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA.
authors.forename: G V
authors.initials: GV
authors.lastname: Brown
authors.affiliation: Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA.
authors.forename: N
authors.initials: N
authors.lastname: Hell
authors.affiliation: NASA Goddard Space Flight Center, Code 662, Greenbelt, Maryland 20771, USA.
authors.forename: R L
authors.initials: RL
authors.lastname: Kelley
authors.affiliation: NASA Goddard Space Flight Center, Code 662, Greenbelt, Maryland 20771, USA.
authors.forename: C A
authors.initials: CA
authors.lastname: Kilbourne
authors.affiliation: Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, California 94550, USA.
authors.forename: E W
authors.initials: EW
authors.lastname: Magee
authors.affiliation: NASA Goddard Space Flight Center, Code 662, Greenbelt, Maryland 20771, USA.
authors.forename: F S
authors.initials: FS
authors.lastname: Porter