The composition of xenon contained within planetary materials can elucidate the conditions within which they were formed and the environments in which they have resided since formation. This work focused on extracting and interpreting xenon isotopic compositions from primitive m…
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The SuperTIGER (Trans-Iron Galactic Element Recorder) experiment was launched on a long-duration balloon flight from Williams Field, Antarctica, on December 8, 2012. The instrument measured the relative elemental abundances of galactic cosmic rays (GCR) in the charge ( Z ) range…
Using the Cosmic Ray Isotope Spectrometer (CRIS) onboard the Advanced Composition Explorer (ACE) spacecraft, new and improved high-precision measurements of the elemental composition and energy spectra of galactic cosmic rays with energies from ∼50–550 MeV/nucleon and nuclear ch…
The Trans-Iron Galactic Element Recorder (TIGER) is a long duration balloon (LDB) borne instrument designed to measure the relative elemental abundances of the ultra-heavy (UH) (30 ≤ Z ≤ 40) galactic cosmic rays (GCR). TIGER measures charge (Z) and energy ( E) using a combinatio…
The precise phase-space distribution and properties of Galactic dark matter necessary for its direct and indirect detection are currently unknown. Since the distributions of normal and dark matter in the Milky Way are coupled to each other as they both move in the same gravitati…
The use of scintillating fibers in high-energy astrophysics shows great promise for future gamma-ray and cosmic-ray instruments. The current performance of scintillating fibers is examined in this work along with several read-out devices and associated electronics including imag…
The secondary isotopes 37Ar, 44Ti, 49V, 51Cr, 55Fe, and 57Co decay only by electron capture, which occurs preferentially at the lower cosmic-ray energies where electron attachment is more likely to occur; measurements of their abundances may reveal the interstellar energies of c…