The Supertiger Instrument: Measurement of Elemental Abundances of Ultra-Heavy Galactic Cosmic Rays

Binns, W. R.; Bose, R.; Braun, Dana; Brandt, T. J.; Daniels, W. M.; Dowkonnt, P.; Fitzsimmons, Sean P.; Hahne, D. J.; Hams, T.; Israel, M. H.; Klemic, J.; Labrador, A. W.; Link, J. T.; Mewaldt, R. A.; Mitchell, J. W.; Moore, Philip; Murphy, Ryan; Olevitch, M. A.; Rauch, B. F.; Sakai, Kenichi; Sebastian, F. San; Sasaki, M.; Simburger, Garry E; Stone, E. C.; Waddington, C. J.; Ward, J. E.; Wiedenbeck, M. E.

doi:10.1088/0004-637x/788/1/18

Cited by 39 publications

(32 citation statements)

References 37 publications

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“…Photomultiplier Tubes (PMTs) were used to measure the light output of GCR nuclei within each detector, and the PMT signals were read out with a custom electronics suite. More information on the SuperTIGER instrument can be found in [1]. In these proceedings, more information on the instrument and data analysis can be found in [2] and [3].…”

Section: Introductionmentioning

confidence: 99%

Abundances of Ultra-Heavy Galactic Cosmic Rays from the SuperTIGER Instrument

Murphy¹,

Binns²,

Bose³

et al. 2016

Proceedings of the 34th International Cosmic Ray Conference — PoS(ICRC2015)

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The SuperTIGER (Trans-Iron Galactic Element Recorder) experiment was launched on a longduration balloon flight from Williams Field, Antarctica, on December 8, 2012. SuperTIGER flew for a total of 55 days at a mean atmospheric depth of 4.4 g/cm 2 . The instrument measured the abundances of galactic cosmic rays in the charge (Z) range Z ≥ 10 with excellent charge resolution, displaying well resolved individual element peaks for 10 ≤ Z ≤ 40. SuperTIGER collected ∼ 3.95 × 10 6 Iron nuclei, ∼ 7.1 times as many as detected by TIGER. We will present details of the data analysis techniques and the elemental abundances in the range 30 ≤ Z ≤ 40. The data presented contain more than 600 events in this charge range, with charge resolution at 26 Fe of < 0.18 cu. Our measured abundances are generally consistent with those measured by TIGER and ACE. Our results confirm the earlier results from TIGER, supporting a model of cosmic-ray origin in OB associations, with preferential acceleration of refractory elements over volatile elements.

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Section: Introductionmentioning

confidence: 99%

Abundances of Ultra-Heavy Galactic Cosmic Rays from the SuperTIGER Instrument

Murphy¹,

Binns²,

Bose³

et al. 2016

Proceedings of the 34th International Cosmic Ray Conference — PoS(ICRC2015)

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“…Understanding the origin of CRs, their acceleration mechanisms, main features of the interstellar propagation, and CR source composition would be impossible without extraordinary efforts of the teams built around Cosmic Ray Iso-tope Spectrometer (CRIS) onboard NASA's Advanced Composition Explorer (ACE, Stone et al 1998), Super TransIron Galactic Element Recorder (SuperTIGER, Binns et al 2014), and other (earlier) experiments such as ATIC, BESS, CAPRICE, CREAM, HEAO-3, HEAT, ISOMAX, TIGER, TRACER, Ulysses, and others. Launched in 1977 at the dawn of the space era, Voyager 1, 2 spacecrafts (Stone et al 1977) demonstrate unbelievable scientific longevity providing unique data on the elemental spectra and composition at the interstellar reaches of the Solar system, currently at 138 AU and 114 AU from the Sun, correspondingly.…”

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confidence: 99%

Solution of Heliospheric Propagation: Unveiling the Local Interstellar Spectra of Cosmic-ray Species

Boschini

Torre

Gervasi

et al. 2017

ApJ

149

181

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Local interstellar spectra (LIS) for protons, helium and antiprotons are built using the most recent experimental results combined with the state-of-the-art models for propagation in the Galaxy and heliosphere. Two propagation packages, GALPROP and HelMod, are combined to provide a single framework that is run to reproduce direct measurements of cosmic ray (CR) species at different modulation levels and at both polarities of the solar magnetic field. To do so in a self-consistent way, an iterative procedure was developed, where the GALPROP LIS output is fed into HelMod that provides modulated spectra for specific time periods of selected experiments to compare with the data; the HelMod parameters optimization is performed at this stage and looped back to adjust the LIS using the new GALPROP run. The parameters were tuned with the maximum likelihood procedure using an extensive data set of proton spectra from 1997-2015. The proposed LIS accommodate both the low energy interstellar CR spectra measured by Voyager 1 and the high energy observations by BESS, Pamela, AMS-01, and AMS-02 made from the balloons and near-Earth payloads; it also accounts for Ulysses counting rate features measured out of the ecliptic plane. The found solution is in a good agreement with proton, helium, and antiproton data by AMS-02, BESS, and PAMELA in the whole energy range.

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“…The balloon-borne superTIGER stratospheric experiment [3] was also based on using the Cherenkov technique. Charge distributions in a wide range of charges for superheavy nuclei with charges above Z = 40 were obtained for nucleus energies above 2-3 GeV/nucleon, with…”

Section: Existing Datamentioning

confidence: 99%

“…None of the experiments [1][2][3] measured the isotopic composition of cosmic-ray nuclei. Information on isotopes of superheavy nuclei in cosmic rays was obtained in the CRIS experiment on board the ACE spacecraft [4].…”

Section: Pos(icrc2017)166mentioning

confidence: 99%