Cosmic ray helium isotopes from the BESS-Polar I experiment

N. Picot-Clemente; K. Abe; H. Fuke; S. Haino; T. Hams; A. Itazaki; K. C. Kim; T. Kumazawa; M. H. Lee; Y. Makida; S. Matsuda; K. Matsumoto; J. W. Mitchell; Z. Myers; J. Nishimura; M. Nozaki; R. Orito; J. F. Ormes; M. Sasaki; E. S. Seo; Y. Shikaze; R. E. Streitmatter; J. Suzuki; Y. Takasugi; K. Takeuchi; K. Tanaka; T. Yamagami; A. Yamamoto; T. Yoshida; K. Yoshimura

doi:10.7529/ICRC2011/V06/0699

Cosmic ray helium isotopes from the BESS-Polar I experiment

N. Picot-Clemente, K. Abe, H. Fuke, S. Haino, T. Hams, A. Itazaki, K. C. Kim, T. Kumazawa, M. H. Lee, Y. Makida, S. Matsuda, K. Matsumoto, J. W. Mitchell, Z. Myers, J. Nishimura, M. Nozaki, R. Orito, J. F. Ormes, M. Sasaki, E. S. SeoY. Shikaze, R. E. Streitmatter, J. Suzuki, Y. Takasugi, K. Takeuchi, K. Tanaka, T. Yamagami, A. Yamamoto, T. Yoshida, K. Yoshimura

Research Institute for Interdisciplinary Science

Research output: Contribution to conference › Paper

Abstract

The first flight of the Balloon-Borne Experiment with a Superconducting Spectrometer (BESS-Polar I) in Antarctica collected about 900 million cosmic ray events during 8.5 days in 2004. Particle charge was determined from energy loss in the scintillators, rigidity by reconstructing each particle trajectory in the magnetic field, and velocity by utilizing time of flights counters. These measurements can clearly identify hydrogen and helium isotopes among the incoming particles. These isotopes are generally believed to result from nuclear interactions of primaries with the interstellar medium. Measurement of their flux is expected to provide important information on cosmic ray sources and particle propagation in interstellar space. The presentation will focus on determination of the helium isotope flux in the kinetic energy per nucleon range 0.1 GeV/n to about 1.5 GeV/n. After quickly introducing the BESS-Polar I detector, the dedicated analysis to differentiate isotopes will be described. Finally, the energy spectra will be presented and compared to previous measurements.

Original language	English
Pages	51-54
Number of pages	4
DOIs	https://doi.org/10.7529/ICRC2011/V06/0699
Publication status	Published - Jan 1 2011
Event	32nd International Cosmic Ray Conference, ICRC 2011 - Beijing, China Duration: Aug 11 2011 → Aug 18 2011

Other

Other	32nd International Cosmic Ray Conference, ICRC 2011
Country	China
City	Beijing
Period	8/11/11 → 8/18/11

Keywords

BESS
BESS-polar I
Balloon-borne experiment
Cosmic-rays
Helium isotopes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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Picot-Clemente, N., Abe, K., Fuke, H., Haino, S., Hams, T., Itazaki, A., Kim, K. C., Kumazawa, T., Lee, M. H., Makida, Y., Matsuda, S., Matsumoto, K., Mitchell, J. W., Myers, Z., Nishimura, J., Nozaki, M., Orito, R., Ormes, J. F., Sasaki, M., ... Yoshimura, K. (2011). Cosmic ray helium isotopes from the BESS-Polar I experiment. 51-54. Paper presented at 32nd International Cosmic Ray Conference, ICRC 2011, Beijing, China. https://doi.org/10.7529/ICRC2011/V06/0699

Cosmic ray helium isotopes from the BESS-Polar I experiment. / Picot-Clemente, N.; Abe, K.; Fuke, H.; Haino, S.; Hams, T.; Itazaki, A.; Kim, K. C.; Kumazawa, T.; Lee, M. H.; Makida, Y.; Matsuda, S.; Matsumoto, K.; Mitchell, J. W.; Myers, Z.; Nishimura, J.; Nozaki, M.; Orito, R.; Ormes, J. F.; Sasaki, M.; Seo, E. S.; Shikaze, Y.; Streitmatter, R. E.; Suzuki, J.; Takasugi, Y.; Takeuchi, K.; Tanaka, K.; Yamagami, T.; Yamamoto, A.; Yoshida, T.; Yoshimura, K.

2011. 51-54 Paper presented at 32nd International Cosmic Ray Conference, ICRC 2011, Beijing, China.

Research output: Contribution to conference › Paper

Picot-Clemente, N, Abe, K, Fuke, H, Haino, S, Hams, T, Itazaki, A, Kim, KC, Kumazawa, T, Lee, MH, Makida, Y, Matsuda, S, Matsumoto, K, Mitchell, JW, Myers, Z, Nishimura, J, Nozaki, M, Orito, R, Ormes, JF, Sasaki, M, Seo, ES, Shikaze, Y, Streitmatter, RE, Suzuki, J, Takasugi, Y, Takeuchi, K, Tanaka, K, Yamagami, T, Yamamoto, A, Yoshida, T & Yoshimura, K 2011, 'Cosmic ray helium isotopes from the BESS-Polar I experiment', Paper presented at 32nd International Cosmic Ray Conference, ICRC 2011, Beijing, China, 8/11/11 - 8/18/11 pp. 51-54. https://doi.org/10.7529/ICRC2011/V06/0699

Picot-Clemente, N. ; Abe, K. ; Fuke, H. ; Haino, S. ; Hams, T. ; Itazaki, A. ; Kim, K. C. ; Kumazawa, T. ; Lee, M. H. ; Makida, Y. ; Matsuda, S. ; Matsumoto, K. ; Mitchell, J. W. ; Myers, Z. ; Nishimura, J. ; Nozaki, M. ; Orito, R. ; Ormes, J. F. ; Sasaki, M. ; Seo, E. S. ; Shikaze, Y. ; Streitmatter, R. E. ; Suzuki, J. ; Takasugi, Y. ; Takeuchi, K. ; Tanaka, K. ; Yamagami, T. ; Yamamoto, A. ; Yoshida, T. ; Yoshimura, K. / Cosmic ray helium isotopes from the BESS-Polar I experiment. Paper presented at 32nd International Cosmic Ray Conference, ICRC 2011, Beijing, China.4 p.

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abstract = "The first flight of the Balloon-Borne Experiment with a Superconducting Spectrometer (BESS-Polar I) in Antarctica collected about 900 million cosmic ray events during 8.5 days in 2004. Particle charge was determined from energy loss in the scintillators, rigidity by reconstructing each particle trajectory in the magnetic field, and velocity by utilizing time of flights counters. These measurements can clearly identify hydrogen and helium isotopes among the incoming particles. These isotopes are generally believed to result from nuclear interactions of primaries with the interstellar medium. Measurement of their flux is expected to provide important information on cosmic ray sources and particle propagation in interstellar space. The presentation will focus on determination of the helium isotope flux in the kinetic energy per nucleon range 0.1 GeV/n to about 1.5 GeV/n. After quickly introducing the BESS-Polar I detector, the dedicated analysis to differentiate isotopes will be described. Finally, the energy spectra will be presented and compared to previous measurements.",

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AU - Picot-Clemente, N.

AU - Abe, K.

AU - Fuke, H.

AU - Haino, S.

AU - Hams, T.

AU - Itazaki, A.

AU - Kim, K. C.

AU - Kumazawa, T.

AU - Lee, M. H.

AU - Makida, Y.

AU - Matsuda, S.

AU - Matsumoto, K.

AU - Mitchell, J. W.

AU - Myers, Z.

AU - Nishimura, J.

AU - Nozaki, M.

AU - Orito, R.

AU - Ormes, J. F.

AU - Sasaki, M.

AU - Seo, E. S.

AU - Shikaze, Y.

AU - Streitmatter, R. E.

AU - Suzuki, J.

AU - Takasugi, Y.

AU - Takeuchi, K.

AU - Tanaka, K.

AU - Yamagami, T.

AU - Yamamoto, A.

AU - Yoshida, T.

AU - Yoshimura, K.

PY - 2011/1/1

Y1 - 2011/1/1

N2 - The first flight of the Balloon-Borne Experiment with a Superconducting Spectrometer (BESS-Polar I) in Antarctica collected about 900 million cosmic ray events during 8.5 days in 2004. Particle charge was determined from energy loss in the scintillators, rigidity by reconstructing each particle trajectory in the magnetic field, and velocity by utilizing time of flights counters. These measurements can clearly identify hydrogen and helium isotopes among the incoming particles. These isotopes are generally believed to result from nuclear interactions of primaries with the interstellar medium. Measurement of their flux is expected to provide important information on cosmic ray sources and particle propagation in interstellar space. The presentation will focus on determination of the helium isotope flux in the kinetic energy per nucleon range 0.1 GeV/n to about 1.5 GeV/n. After quickly introducing the BESS-Polar I detector, the dedicated analysis to differentiate isotopes will be described. Finally, the energy spectra will be presented and compared to previous measurements.

AB - The first flight of the Balloon-Borne Experiment with a Superconducting Spectrometer (BESS-Polar I) in Antarctica collected about 900 million cosmic ray events during 8.5 days in 2004. Particle charge was determined from energy loss in the scintillators, rigidity by reconstructing each particle trajectory in the magnetic field, and velocity by utilizing time of flights counters. These measurements can clearly identify hydrogen and helium isotopes among the incoming particles. These isotopes are generally believed to result from nuclear interactions of primaries with the interstellar medium. Measurement of their flux is expected to provide important information on cosmic ray sources and particle propagation in interstellar space. The presentation will focus on determination of the helium isotope flux in the kinetic energy per nucleon range 0.1 GeV/n to about 1.5 GeV/n. After quickly introducing the BESS-Polar I detector, the dedicated analysis to differentiate isotopes will be described. Finally, the energy spectra will be presented and compared to previous measurements.

KW - BESS

KW - BESS-polar I

KW - Balloon-borne experiment

KW - Cosmic-rays

KW - Helium isotopes

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