Time variations of cosmic-ray helium isotopes with BESS-Polar i

K. Abe; H. Fuke; S. Haino; T. Hams; M. Hasegawa; A. Horikoshi; A. Itazaki; K. C. Kim; T. Kumazawa; A. Kusumoto; M. H. Lee; Y. Makida; S. Matsuda; Y. Matsukawa; K. Matsumoto; J. W. Mitchell; A. A. Moiseev; J. Nishimura; M. Nozaki; R. Orito; J. F. Ormes; N. Picot-Clémente; K. Sakai; M. Sasaki; E. S. Seo; Y. Shikaze; R. Shinoda; R. E. Streitmatter; J. Suzuki; Y. Takasugi; K. Takeuchi; K. Tanaka; N. Thakur; T. Yamagami; A. Yamamoto; T. Yoshida; K. Yoshimura

doi:10.1016/j.asr.2013.09.028

Time variations of cosmic-ray helium isotopes with BESS-Polar i

K. Abe, H. Fuke, S. Haino, T. Hams, M. Hasegawa, A. Horikoshi, A. Itazaki, K. C. Kim, T. Kumazawa, A. Kusumoto, M. H. Lee, Y. Makida, S. Matsuda, Y. Matsukawa, K. Matsumoto, J. W. Mitchell, A. A. Moiseev, J. Nishimura, M. Nozaki, R. OritoJ. F. Ormes, N. Picot-Clémente, K. Sakai, M. Sasaki, E. S. Seo, Y. Shikaze, R. Shinoda, R. E. Streitmatter, J. Suzuki, Y. Takasugi, K. Takeuchi, K. Tanaka, N. Thakur, T. Yamagami, A. Yamamoto, T. Yoshida, K. Yoshimura

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The Balloon-borne Experiment with a Superconducting Spectrometer (BESS) is configured with a solenoidal superconducting magnet and a suite of precision particle detectors, including time-of-flight hodoscopes based on plastic scintillators, a silica-aerogel Cherenkov detector, and a high resolution tracking system with a central jet-type drift chamber. The charges of incident particles are determined from energy losses in the scintillators. Their magnetic rigidities (momentum/charge) are measured by reconstructing each particle trajectory in the magnetic field, and their velocities are obtained by using the time-of-flight system. Together, these measurements can accurately identify helium isotopes among the incoming cosmic-ray helium nuclei up to energies in the GeV per nucleon region. The BESS-Polar I instrument flew for 8.5 days over Antarctica from December 13th to December 21st, 2004. Its long-duration flight and large geometric acceptance allow the time variations of isotopic fluxes to be studied for the first time. The time variations of helium isotope fluxes are presented here for rigidities from 1.2 to 2.5 GV and results are compared to previously reported proton data and neutron monitor data.

Original language	English
Pages (from-to)	1426-1431
Number of pages	6
Journal	Advances in Space Research
Volume	53
Issue number	10
DOIs	https://doi.org/10.1016/j.asr.2013.09.028
Publication status	Published - May 15 2014
Externally published	Yes

Keywords

Cosmic-ray flux time variations
Cosmic-ray isotopes
Solar activity
Solar modulation

ASJC Scopus subject areas

Aerospace Engineering
Astronomy and Astrophysics
Geophysics
Atmospheric Science
Space and Planetary Science
Earth and Planetary Sciences(all)

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10.1016/j.asr.2013.09.028

Cite this

Abe, K., Fuke, H., Haino, S., Hams, T., Hasegawa, M., Horikoshi, A., Itazaki, A., Kim, K. C., Kumazawa, T., Kusumoto, A., Lee, M. H., Makida, Y., Matsuda, S., Matsukawa, Y., Matsumoto, K., Mitchell, J. W., Moiseev, A. A., Nishimura, J., Nozaki, M., ... Yoshimura, K. (2014). Time variations of cosmic-ray helium isotopes with BESS-Polar i. Advances in Space Research, 53(10), 1426-1431. https://doi.org/10.1016/j.asr.2013.09.028

Abe, K, Fuke, H, Haino, S, Hams, T, Hasegawa, M, Horikoshi, A, Itazaki, A, Kim, KC, Kumazawa, T, Kusumoto, A, Lee, MH, Makida, Y, Matsuda, S, Matsukawa, Y, Matsumoto, K, Mitchell, JW, Moiseev, AA, Nishimura, J, Nozaki, M, Orito, R, Ormes, JF, Picot-Clémente, N, Sakai, K, Sasaki, M, Seo, ES, Shikaze, Y, Shinoda, R, Streitmatter, RE, Suzuki, J, Takasugi, Y, Takeuchi, K, Tanaka, K, Thakur, N, Yamagami, T, Yamamoto, A, Yoshida, T & Yoshimura, K 2014, 'Time variations of cosmic-ray helium isotopes with BESS-Polar i', Advances in Space Research, vol. 53, no. 10, pp. 1426-1431. https://doi.org/10.1016/j.asr.2013.09.028

@article{1f9051322a5e45e496026abe38cd5d5f,

title = "Time variations of cosmic-ray helium isotopes with BESS-Polar i",

abstract = "The Balloon-borne Experiment with a Superconducting Spectrometer (BESS) is configured with a solenoidal superconducting magnet and a suite of precision particle detectors, including time-of-flight hodoscopes based on plastic scintillators, a silica-aerogel Cherenkov detector, and a high resolution tracking system with a central jet-type drift chamber. The charges of incident particles are determined from energy losses in the scintillators. Their magnetic rigidities (momentum/charge) are measured by reconstructing each particle trajectory in the magnetic field, and their velocities are obtained by using the time-of-flight system. Together, these measurements can accurately identify helium isotopes among the incoming cosmic-ray helium nuclei up to energies in the GeV per nucleon region. The BESS-Polar I instrument flew for 8.5 days over Antarctica from December 13th to December 21st, 2004. Its long-duration flight and large geometric acceptance allow the time variations of isotopic fluxes to be studied for the first time. The time variations of helium isotope fluxes are presented here for rigidities from 1.2 to 2.5 GV and results are compared to previously reported proton data and neutron monitor data.",

keywords = "Cosmic-ray flux time variations, Cosmic-ray isotopes, Solar activity, Solar modulation",

author = "K. Abe and H. Fuke and S. Haino and T. Hams and M. Hasegawa and A. Horikoshi and A. Itazaki and Kim, {K. C.} and T. Kumazawa and A. Kusumoto and Lee, {M. H.} and Y. Makida and S. Matsuda and Y. Matsukawa and K. Matsumoto and Mitchell, {J. W.} and Moiseev, {A. A.} and J. Nishimura and M. Nozaki and R. Orito and Ormes, {J. F.} and N. Picot-Cl{\'e}mente and K. Sakai and M. Sasaki and Seo, {E. S.} and Y. Shikaze and R. Shinoda and Streitmatter, {R. E.} and J. Suzuki and Y. Takasugi and K. Takeuchi and K. Tanaka and N. Thakur and T. Yamagami and A. Yamamoto and T. Yoshida and K. Yoshimura",

note = "Funding Information: The BESS-Polar experiment is a Japan-U.S. collaboration, supported by KAKEN-Hi ( 13001004 and 18104006 ) in Japan, and by NASA in the US. The authors thank NASA Headquarters, the NASA Balloon Program Office at Goddard Space Flight Center/Wallops Flight Facility, and the NASA Columbia Scientific Balloon Facility, as well as ISAS/JAXA and KEK for their support. Thanks to the US National Science Foundation (NSF) and Raytheon Polar Services Company for their professional support in the USA and in Antarctica. The authors thank the Bartol Research Institute neutron monitor program, supported by the NSF (Grant ATM-0000315 ), for providing their data. The authors thank the ACE SWEPAM, MAG, EPAM, and SIS instrument teams and the ACE Science Center for providing the ACE data.",

year = "2014",

month = may,

day = "15",

doi = "10.1016/j.asr.2013.09.028",

language = "English",

volume = "53",

pages = "1426--1431",

journal = "Life sciences and space research",

issn = "0273-1177",

publisher = "Elsevier Limited",

number = "10",

}

TY - JOUR

T1 - Time variations of cosmic-ray helium isotopes with BESS-Polar i

AU - Abe, K.

AU - Fuke, H.

AU - Haino, S.

AU - Hams, T.

AU - Hasegawa, M.

AU - Horikoshi, A.

AU - Itazaki, A.

AU - Kim, K. C.

AU - Kumazawa, T.

AU - Kusumoto, A.

AU - Lee, M. H.

AU - Makida, Y.

AU - Matsuda, S.

AU - Matsukawa, Y.

AU - Matsumoto, K.

AU - Mitchell, J. W.

AU - Moiseev, A. A.

AU - Nishimura, J.

AU - Nozaki, M.

AU - Orito, R.

AU - Ormes, J. F.

AU - Picot-Clémente, N.

AU - Sakai, K.

AU - Sasaki, M.

AU - Seo, E. S.

AU - Shikaze, Y.

AU - Shinoda, R.

AU - Streitmatter, R. E.

AU - Suzuki, J.

AU - Takasugi, Y.

AU - Takeuchi, K.

AU - Tanaka, K.

AU - Thakur, N.

AU - Yamagami, T.

AU - Yamamoto, A.

AU - Yoshida, T.

AU - Yoshimura, K.

N1 - Funding Information: The BESS-Polar experiment is a Japan-U.S. collaboration, supported by KAKEN-Hi ( 13001004 and 18104006 ) in Japan, and by NASA in the US. The authors thank NASA Headquarters, the NASA Balloon Program Office at Goddard Space Flight Center/Wallops Flight Facility, and the NASA Columbia Scientific Balloon Facility, as well as ISAS/JAXA and KEK for their support. Thanks to the US National Science Foundation (NSF) and Raytheon Polar Services Company for their professional support in the USA and in Antarctica. The authors thank the Bartol Research Institute neutron monitor program, supported by the NSF (Grant ATM-0000315 ), for providing their data. The authors thank the ACE SWEPAM, MAG, EPAM, and SIS instrument teams and the ACE Science Center for providing the ACE data.

PY - 2014/5/15

Y1 - 2014/5/15

N2 - The Balloon-borne Experiment with a Superconducting Spectrometer (BESS) is configured with a solenoidal superconducting magnet and a suite of precision particle detectors, including time-of-flight hodoscopes based on plastic scintillators, a silica-aerogel Cherenkov detector, and a high resolution tracking system with a central jet-type drift chamber. The charges of incident particles are determined from energy losses in the scintillators. Their magnetic rigidities (momentum/charge) are measured by reconstructing each particle trajectory in the magnetic field, and their velocities are obtained by using the time-of-flight system. Together, these measurements can accurately identify helium isotopes among the incoming cosmic-ray helium nuclei up to energies in the GeV per nucleon region. The BESS-Polar I instrument flew for 8.5 days over Antarctica from December 13th to December 21st, 2004. Its long-duration flight and large geometric acceptance allow the time variations of isotopic fluxes to be studied for the first time. The time variations of helium isotope fluxes are presented here for rigidities from 1.2 to 2.5 GV and results are compared to previously reported proton data and neutron monitor data.

AB - The Balloon-borne Experiment with a Superconducting Spectrometer (BESS) is configured with a solenoidal superconducting magnet and a suite of precision particle detectors, including time-of-flight hodoscopes based on plastic scintillators, a silica-aerogel Cherenkov detector, and a high resolution tracking system with a central jet-type drift chamber. The charges of incident particles are determined from energy losses in the scintillators. Their magnetic rigidities (momentum/charge) are measured by reconstructing each particle trajectory in the magnetic field, and their velocities are obtained by using the time-of-flight system. Together, these measurements can accurately identify helium isotopes among the incoming cosmic-ray helium nuclei up to energies in the GeV per nucleon region. The BESS-Polar I instrument flew for 8.5 days over Antarctica from December 13th to December 21st, 2004. Its long-duration flight and large geometric acceptance allow the time variations of isotopic fluxes to be studied for the first time. The time variations of helium isotope fluxes are presented here for rigidities from 1.2 to 2.5 GV and results are compared to previously reported proton data and neutron monitor data.

KW - Cosmic-ray flux time variations

KW - Cosmic-ray isotopes

KW - Solar activity

KW - Solar modulation

UR - http://www.scopus.com/inward/record.url?scp=84898797772&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84898797772&partnerID=8YFLogxK

U2 - 10.1016/j.asr.2013.09.028

DO - 10.1016/j.asr.2013.09.028

M3 - Article

AN - SCOPUS:84898797772

SN - 0273-1177

VL - 53

SP - 1426

EP - 1431

JO - Life sciences and space research

JF - Life sciences and space research

IS - 10

ER -

Time variations of cosmic-ray helium isotopes with BESS-Polar i

Abstract

Keywords

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