Proton and Helium Spectra from the CREAM-III Flight

Y. S. Yoon; T. Anderson; A. Barrau; N. B. Conklin; S. Coutu; L. Derome; J. H. Han; J. A. Jeon; K. C. Kim; M. H. Kim; H. Y. Lee; J. Lee; M. H. Lee; S. E. Lee; J. T. Link; A. Menchaca-Rocha; J. W. Mitchell; S. I. Mognet; S. Nutter; I. H. Park; N. Picot-Clemente; A. Putze; E. S. Seo; J. Smith; J. Wu

doi:10.3847/1538-4357/aa68e4

Proton and Helium Spectra from the CREAM-III Flight

Y. S. Yoon, T. Anderson, A. Barrau, N. B. Conklin, S. Coutu, L. Derome, J. H. Han, J. A. Jeon, K. C. Kim, M. H. Kim, H. Y. Lee, J. Lee, M. H. Lee, S. E. Lee, J. T. Link, A. Menchaca-Rocha, J. W. Mitchell, S. I. Mognet, S. Nutter, I. H. ParkN. Picot-Clemente, A. Putze, E. S. Seo, J. Smith, J. Wu

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Abstract

Primary cosmic-ray elemental spectra have been measured with the balloon-borne Cosmic Ray Energetics And Mass (CREAM) experiment since 2004. The third CREAM payload (CREAM-III) flew for 29 days during the 2007-2008 Antarctic season. Energies of incident particles above 1 TeV are measured with a calorimeter. Individual elements are clearly separated with a charge resolution of ∼0.12 e (in charge units) and ∼0.14 e for protons and helium nuclei, respectively, using two layers of silicon charge detectors. The measured proton and helium energy spectra at the top of the atmosphere are harder than other existing measurements at a few tens of GeV. The relative abundance of protons to helium nuclei is 9.53 ±0.03 for the range of 1 TeV/n to 63 TeV/n. This ratio is considerably smaller than other measurements at a few tens of GeV/n. The spectra become softer above ∼20 TeV. However, our statistical uncertainties are large at these energies and more data are needed.

Original language	English (US)
Article number	5
Journal	Astrophysical Journal
Volume	839
Issue number	1
DOIs	https://doi.org/10.3847/1538-4357/aa68e4
State	Published - Apr 10 2017

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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Yoon, Y. S., Anderson, T., Barrau, A., Conklin, N. B., Coutu, S., Derome, L., Han, J. H., Jeon, J. A., Kim, K. C., Kim, M. H., Lee, H. Y., Lee, J., Lee, M. H., Lee, S. E., Link, J. T., Menchaca-Rocha, A., Mitchell, J. W., Mognet, S. I., Nutter, S., ... Wu, J. (2017). Proton and Helium Spectra from the CREAM-III Flight. Astrophysical Journal, 839(1), Article 5. https://doi.org/10.3847/1538-4357/aa68e4

@article{3b2a265f743b4b0e9b35902ff234b103,

title = "Proton and Helium Spectra from the CREAM-III Flight",

abstract = "Primary cosmic-ray elemental spectra have been measured with the balloon-borne Cosmic Ray Energetics And Mass (CREAM) experiment since 2004. The third CREAM payload (CREAM-III) flew for 29 days during the 2007-2008 Antarctic season. Energies of incident particles above 1 TeV are measured with a calorimeter. Individual elements are clearly separated with a charge resolution of ∼0.12 e (in charge units) and ∼0.14 e for protons and helium nuclei, respectively, using two layers of silicon charge detectors. The measured proton and helium energy spectra at the top of the atmosphere are harder than other existing measurements at a few tens of GeV. The relative abundance of protons to helium nuclei is 9.53 ±0.03 for the range of 1 TeV/n to 63 TeV/n. This ratio is considerably smaller than other measurements at a few tens of GeV/n. The spectra become softer above ∼20 TeV. However, our statistical uncertainties are large at these energies and more data are needed.",

author = "Yoon, {Y. S.} and T. Anderson and A. Barrau and Conklin, {N. B.} and S. Coutu and L. Derome and Han, {J. H.} and Jeon, {J. A.} and Kim, {K. C.} and Kim, {M. H.} and Lee, {H. Y.} and J. Lee and Lee, {M. H.} and Lee, {S. E.} and Link, {J. T.} and A. Menchaca-Rocha and Mitchell, {J. W.} and Mognet, {S. I.} and S. Nutter and Park, {I. H.} and N. Picot-Clemente and A. Putze and Seo, {E. S.} and J. Smith and J. Wu",

year = "2017",

month = apr,

day = "10",

doi = "10.3847/1538-4357/aa68e4",

language = "English (US)",

volume = "839",

journal = "Astrophysical Journal",

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Yoon, YS, Anderson, T, Barrau, A, Conklin, NB, Coutu, S, Derome, L, Han, JH, Jeon, JA, Kim, KC, Kim, MH, Lee, HY, Lee, J, Lee, MH, Lee, SE, Link, JT, Menchaca-Rocha, A, Mitchell, JW, Mognet, SI, Nutter, S, Park, IH, Picot-Clemente, N, Putze, A, Seo, ES, Smith, J & Wu, J 2017, 'Proton and Helium Spectra from the CREAM-III Flight', Astrophysical Journal, vol. 839, no. 1, 5. https://doi.org/10.3847/1538-4357/aa68e4

TY - JOUR

T1 - Proton and Helium Spectra from the CREAM-III Flight

AU - Yoon, Y. S.

AU - Anderson, T.

AU - Barrau, A.

AU - Conklin, N. B.

AU - Coutu, S.

AU - Derome, L.

AU - Han, J. H.

AU - Jeon, J. A.

AU - Kim, K. C.

AU - Kim, M. H.

AU - Lee, H. Y.

AU - Lee, J.

AU - Lee, M. H.

AU - Lee, S. E.

AU - Link, J. T.

AU - Menchaca-Rocha, A.

AU - Mitchell, J. W.

AU - Mognet, S. I.

AU - Nutter, S.

AU - Park, I. H.

AU - Picot-Clemente, N.

AU - Putze, A.

AU - Seo, E. S.

AU - Smith, J.

AU - Wu, J.

PY - 2017/4/10

Y1 - 2017/4/10

N2 - Primary cosmic-ray elemental spectra have been measured with the balloon-borne Cosmic Ray Energetics And Mass (CREAM) experiment since 2004. The third CREAM payload (CREAM-III) flew for 29 days during the 2007-2008 Antarctic season. Energies of incident particles above 1 TeV are measured with a calorimeter. Individual elements are clearly separated with a charge resolution of ∼0.12 e (in charge units) and ∼0.14 e for protons and helium nuclei, respectively, using two layers of silicon charge detectors. The measured proton and helium energy spectra at the top of the atmosphere are harder than other existing measurements at a few tens of GeV. The relative abundance of protons to helium nuclei is 9.53 ±0.03 for the range of 1 TeV/n to 63 TeV/n. This ratio is considerably smaller than other measurements at a few tens of GeV/n. The spectra become softer above ∼20 TeV. However, our statistical uncertainties are large at these energies and more data are needed.

AB - Primary cosmic-ray elemental spectra have been measured with the balloon-borne Cosmic Ray Energetics And Mass (CREAM) experiment since 2004. The third CREAM payload (CREAM-III) flew for 29 days during the 2007-2008 Antarctic season. Energies of incident particles above 1 TeV are measured with a calorimeter. Individual elements are clearly separated with a charge resolution of ∼0.12 e (in charge units) and ∼0.14 e for protons and helium nuclei, respectively, using two layers of silicon charge detectors. The measured proton and helium energy spectra at the top of the atmosphere are harder than other existing measurements at a few tens of GeV. The relative abundance of protons to helium nuclei is 9.53 ±0.03 for the range of 1 TeV/n to 63 TeV/n. This ratio is considerably smaller than other measurements at a few tens of GeV/n. The spectra become softer above ∼20 TeV. However, our statistical uncertainties are large at these energies and more data are needed.

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UR - http://www.scopus.com/inward/citedby.url?scp=85018483965&partnerID=8YFLogxK

U2 - 10.3847/1538-4357/aa68e4

DO - 10.3847/1538-4357/aa68e4

M3 - Article

AN - SCOPUS:85018483965

SN - 0004-637X

VL - 839

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 5

ER -

Proton and Helium Spectra from the CREAM-III Flight

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