Precise measurements of atmospheric muon fluxes with the BESS spectrometer

M. Motoki; T. Sanuki; S. Orito; K. Abe; K. Anraku; Y. Asaoka; M. Fujikawa; H. Fuke; S. Haino; M. Imori; K. Izumi; T. Maeno; Y. Makida; N. Matsui; H. Matsumoto; H. Matsunaga; J. Mitchell; T. Mitsui; A. Moiseev; J. Nishimura; M. Nozaki; J. Ormes; T. Saeki; M. Sasaki; E. S. Seo; Y. Shikaze; T. Sonoda; R. Streitmatter; J. Suzuki; K. Tanaka; I. Ueda; J. Z. Wang; N. Yajima; T. Yamagami; A. Yamamoto; Y. Yamamoto; K. Yamato; T. Yoshida; K. Yoshimura

doi:10.1016/S0927-6505(02)00195-0

Precise measurements of atmospheric muon fluxes with the BESS spectrometer

M. Motoki^*, T. Sanuki, S. Orito, K. Abe, K. Anraku, Y. Asaoka, M. Fujikawa, H. Fuke, S. Haino, M. Imori, K. Izumi, T. Maeno, Y. Makida, N. Matsui, H. Matsumoto, H. Matsunaga, J. Mitchell, T. Mitsui, A. Moiseev, J. NishimuraM. Nozaki, J. Ormes, T. Saeki, M. Sasaki, E. S. Seo, Y. Shikaze, T. Sonoda, R. Streitmatter, J. Suzuki, K. Tanaka, I. Ueda, J. Z. Wang, N. Yajima, T. Yamagami, A. Yamamoto, Y. Yamamoto, K. Yamato, T. Yoshida, K. Yoshimura

^*Corresponding author for this work

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

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Abstract

The vertical absolute fluxes of atmospheric muons and muon charge ratio have been measured precisely at different geomagnetic locations by using the BESS spectrometer. The observations had been performed at sea level (30 m above sea level) in Tsukuba, Japan, and at 360 m above sea level in Lynn Lake, Canada. The vertical cutoff rigidities in Tsukuba (36.2°N, 140.1°E) and in Lynn Lake (56.5°N, 101.0°W) are 11.4 and 0.4 GV, respectively. We have obtained vertical fluxes of positive and negative muons in a momentum range from 0.6 to 20 GeV/c with systematic errors <3% in both measurements. By comparing the data collected at two different geomagnetic latitudes, we have seen an effect of cutoff rigidity. The dependence on the atmospheric pressure and temperature, and the solar modulation effect have been also clearly observed. We also clearly observed the decrease of charge ratio of muons at low momentum side with at higher cutoff rigidity region.

Original language	English
Pages (from-to)	113-126
Number of pages	14
Journal	Astroparticle Physics
Volume	19
Issue number	1
DOIs	https://doi.org/10.1016/S0927-6505(02)00195-0
Publication status	Published - 2003 Apr
Externally published	Yes

Keywords

Atmospheric muon
Atmospheric neutrino
Superconducting spectrometer

ASJC Scopus subject areas

Astronomy and Astrophysics

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10.1016/S0927-6505(02)00195-0

Cite this

Motoki, M., Sanuki, T., Orito, S., Abe, K., Anraku, K., Asaoka, Y., Fujikawa, M., Fuke, H., Haino, S., Imori, M., Izumi, K., Maeno, T., Makida, Y., Matsui, N., Matsumoto, H., Matsunaga, H., Mitchell, J., Mitsui, T., Moiseev, A., ... Yoshimura, K. (2003). Precise measurements of atmospheric muon fluxes with the BESS spectrometer. Astroparticle Physics, 19(1), 113-126. https://doi.org/10.1016/S0927-6505(02)00195-0

Motoki, M, Sanuki, T, Orito, S, Abe, K, Anraku, K, Asaoka, Y, Fujikawa, M, Fuke, H, Haino, S, Imori, M, Izumi, K, Maeno, T, Makida, Y, Matsui, N, Matsumoto, H, Matsunaga, H, Mitchell, J, Mitsui, T, Moiseev, A, Nishimura, J, Nozaki, M, Ormes, J, Saeki, T, Sasaki, M, Seo, ES, Shikaze, Y, Sonoda, T, Streitmatter, R, Suzuki, J, Tanaka, K, Ueda, I, Wang, JZ, Yajima, N, Yamagami, T, Yamamoto, A, Yamamoto, Y, Yamato, K, Yoshida, T & Yoshimura, K 2003, 'Precise measurements of atmospheric muon fluxes with the BESS spectrometer', Astroparticle Physics, vol. 19, no. 1, pp. 113-126. https://doi.org/10.1016/S0927-6505(02)00195-0

@article{73e3bc63b112431d802294fd6578f31b,

title = "Precise measurements of atmospheric muon fluxes with the BESS spectrometer",

abstract = "The vertical absolute fluxes of atmospheric muons and muon charge ratio have been measured precisely at different geomagnetic locations by using the BESS spectrometer. The observations had been performed at sea level (30 m above sea level) in Tsukuba, Japan, and at 360 m above sea level in Lynn Lake, Canada. The vertical cutoff rigidities in Tsukuba (36.2°N, 140.1°E) and in Lynn Lake (56.5°N, 101.0°W) are 11.4 and 0.4 GV, respectively. We have obtained vertical fluxes of positive and negative muons in a momentum range from 0.6 to 20 GeV/c with systematic errors <3% in both measurements. By comparing the data collected at two different geomagnetic latitudes, we have seen an effect of cutoff rigidity. The dependence on the atmospheric pressure and temperature, and the solar modulation effect have been also clearly observed. We also clearly observed the decrease of charge ratio of muons at low momentum side with at higher cutoff rigidity region.",

keywords = "Atmospheric muon, Atmospheric neutrino, Superconducting spectrometer",

author = "M. Motoki and T. Sanuki and S. Orito and K. Abe and K. Anraku and Y. Asaoka and M. Fujikawa and H. Fuke and S. Haino and M. Imori and K. Izumi and T. Maeno and Y. Makida and N. Matsui and H. Matsumoto and H. Matsunaga and J. Mitchell and T. Mitsui and A. Moiseev and J. Nishimura and M. Nozaki and J. Ormes and T. Saeki and M. Sasaki and Seo, {E. S.} and Y. Shikaze and T. Sonoda and R. Streitmatter and J. Suzuki and K. Tanaka and I. Ueda and Wang, {J. Z.} and N. Yajima and T. Yamagami and A. Yamamoto and Y. Yamamoto and K. Yamato and T. Yoshida and K. Yoshimura",

year = "2003",

month = apr,

doi = "10.1016/S0927-6505(02)00195-0",

language = "English",

volume = "19",

pages = "113--126",

journal = "Astroparticle Physics",

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T1 - Precise measurements of atmospheric muon fluxes with the BESS spectrometer

AU - Motoki, M.

AU - Sanuki, T.

AU - Orito, S.

AU - Abe, K.

AU - Anraku, K.

AU - Asaoka, Y.

AU - Fujikawa, M.

AU - Fuke, H.

AU - Haino, S.

AU - Imori, M.

AU - Izumi, K.

AU - Maeno, T.

AU - Makida, Y.

AU - Matsui, N.

AU - Matsumoto, H.

AU - Matsunaga, H.

AU - Mitchell, J.

AU - Mitsui, T.

AU - Moiseev, A.

AU - Nishimura, J.

AU - Nozaki, M.

AU - Ormes, J.

AU - Saeki, T.

AU - Sasaki, M.

AU - Seo, E. S.

AU - Shikaze, Y.

AU - Sonoda, T.

AU - Streitmatter, R.

AU - Suzuki, J.

AU - Tanaka, K.

AU - Ueda, I.

AU - Wang, J. Z.

AU - Yajima, N.

AU - Yamagami, T.

AU - Yamamoto, A.

AU - Yamamoto, Y.

AU - Yamato, K.

AU - Yoshida, T.

AU - Yoshimura, K.

PY - 2003/4

Y1 - 2003/4

N2 - The vertical absolute fluxes of atmospheric muons and muon charge ratio have been measured precisely at different geomagnetic locations by using the BESS spectrometer. The observations had been performed at sea level (30 m above sea level) in Tsukuba, Japan, and at 360 m above sea level in Lynn Lake, Canada. The vertical cutoff rigidities in Tsukuba (36.2°N, 140.1°E) and in Lynn Lake (56.5°N, 101.0°W) are 11.4 and 0.4 GV, respectively. We have obtained vertical fluxes of positive and negative muons in a momentum range from 0.6 to 20 GeV/c with systematic errors <3% in both measurements. By comparing the data collected at two different geomagnetic latitudes, we have seen an effect of cutoff rigidity. The dependence on the atmospheric pressure and temperature, and the solar modulation effect have been also clearly observed. We also clearly observed the decrease of charge ratio of muons at low momentum side with at higher cutoff rigidity region.

AB - The vertical absolute fluxes of atmospheric muons and muon charge ratio have been measured precisely at different geomagnetic locations by using the BESS spectrometer. The observations had been performed at sea level (30 m above sea level) in Tsukuba, Japan, and at 360 m above sea level in Lynn Lake, Canada. The vertical cutoff rigidities in Tsukuba (36.2°N, 140.1°E) and in Lynn Lake (56.5°N, 101.0°W) are 11.4 and 0.4 GV, respectively. We have obtained vertical fluxes of positive and negative muons in a momentum range from 0.6 to 20 GeV/c with systematic errors <3% in both measurements. By comparing the data collected at two different geomagnetic latitudes, we have seen an effect of cutoff rigidity. The dependence on the atmospheric pressure and temperature, and the solar modulation effect have been also clearly observed. We also clearly observed the decrease of charge ratio of muons at low momentum side with at higher cutoff rigidity region.

KW - Atmospheric muon

KW - Atmospheric neutrino

KW - Superconducting spectrometer

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DO - 10.1016/S0927-6505(02)00195-0

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AN - SCOPUS:0037375229

SN - 0927-6505

VL - 19

SP - 113

EP - 126

JO - Astroparticle Physics

JF - Astroparticle Physics

IS - 1

ER -

Precise measurements of atmospheric muon fluxes with the BESS spectrometer

Abstract

Keywords

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