Solar Modulation of low-energy antiproton and proton spectra measured by BESS

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

Solar Modulation of low-energy antiproton and proton spectra measured by BESS

J. W. Mitchell, K. Abe, H. Fuke, S. Haino, T. Hams, M. Hasegawa, A. Horikoshi, K. C. Kim, M. H. Lee, Y. Makida, S. Matsuda, A. Moiseev, J. Nishimura, M. Nozaki, R. Orito, S. Orito, J. F. Ormes, K. Sakai, M. Sasaki, E. S. SeoY. Shikaze, R. E. Streitmatter, J. Suzuki, K. Tanaka, N. Thakur, T. Yamagami, A. Yamamoto, T. Yoshida, K. Yoshimura

Research Institute for Interdisciplinary Science

Research output: Contribution to conference › Paper › peer-review

8 Citations (Scopus)

Abstract

The spectra of low-energy cosmic-ray protons and antiprotons have been measured by BESS in nine high-latitude balloon flights between 1993 and 2004. These measurements span a range of Solar activity from before the previous Solar minimum through Solar maximum and the onset of the present Solar minimum, as well as a Solar magnetic field reversal from positive to negative in 2000. Because protons and antiprotons differ only in charge sign, simultaneous measurements provide a sensitive probe of charge-dependent Solar modulation. The antiproton to proton ratio measured by BESS is consistent with simple spherically symmetric models of Solar modulation during the Sun's positive polarity phase, but requires charge-sign-dependent drift models during the negative phase. The BESS measurements are presented and compared to models of Solar modulation.

Original language	English
Pages	455-458
Number of pages	4
Publication status	Published - 2007
Event	30th International Cosmic Ray Conference, ICRC 2007 - Merida, Yucatan, Mexico Duration: Jul 3 2007 → Jul 11 2007

Other

Other	30th International Cosmic Ray Conference, ICRC 2007
Country	Mexico
City	Merida, Yucatan
Period	7/3/07 → 7/11/07

ASJC Scopus subject areas

Nuclear and High Energy Physics

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Mitchell, J. W., Abe, K., Fuke, H., Haino, S., Hams, T., Hasegawa, M., Horikoshi, A., Kim, K. C., Lee, M. H., Makida, Y., Matsuda, S., Moiseev, A., Nishimura, J., Nozaki, M., Orito, R., Orito, S., Ormes, J. F., Sakai, K., Sasaki, M., ... Yoshimura, K. (2007). Solar Modulation of low-energy antiproton and proton spectra measured by BESS. 455-458. Paper presented at 30th International Cosmic Ray Conference, ICRC 2007, Merida, Yucatan, Mexico.

Solar Modulation of low-energy antiproton and proton spectra measured by BESS. / Mitchell, J. W.; Abe, K.; Fuke, H.; Haino, S.; Hams, T.; Hasegawa, M.; Horikoshi, A.; Kim, K. C.; Lee, M. H.; Makida, Y.; Matsuda, S.; Moiseev, A.; Nishimura, J.; Nozaki, M.; Orito, R.; Orito, S.; Ormes, J. F.; Sakai, K.; Sasaki, M.; Seo, E. S.; Shikaze, Y.; Streitmatter, R. E.; Suzuki, J.; Tanaka, K.; Thakur, N.; Yamagami, T.; Yamamoto, A.; Yoshida, T.; Yoshimura, K.

2007. 455-458 Paper presented at 30th International Cosmic Ray Conference, ICRC 2007, Merida, Yucatan, Mexico.

Research output: Contribution to conference › Paper › peer-review

Mitchell, JW, Abe, K, Fuke, H, Haino, S, Hams, T, Hasegawa, M, Horikoshi, A, Kim, KC, Lee, MH, Makida, Y, Matsuda, S, Moiseev, A, Nishimura, J, Nozaki, M, Orito, R, Orito, S, Ormes, JF, Sakai, K, Sasaki, M, Seo, ES, Shikaze, Y, Streitmatter, RE, Suzuki, J, Tanaka, K, Thakur, N, Yamagami, T, Yamamoto, A, Yoshida, T & Yoshimura, K 2007, 'Solar Modulation of low-energy antiproton and proton spectra measured by BESS', Paper presented at 30th International Cosmic Ray Conference, ICRC 2007, Merida, Yucatan, Mexico, 7/3/07 - 7/11/07 pp. 455-458.

Mitchell, J. W. ; Abe, K. ; Fuke, H. ; Haino, S. ; Hams, T. ; Hasegawa, M. ; Horikoshi, A. ; Kim, K. C. ; Lee, M. H. ; Makida, Y. ; Matsuda, S. ; Moiseev, A. ; Nishimura, J. ; Nozaki, M. ; Orito, R. ; Orito, S. ; Ormes, J. F. ; Sakai, K. ; Sasaki, M. ; Seo, E. S. ; Shikaze, Y. ; Streitmatter, R. E. ; Suzuki, J. ; Tanaka, K. ; Thakur, N. ; Yamagami, T. ; Yamamoto, A. ; Yoshida, T. ; Yoshimura, K. / Solar Modulation of low-energy antiproton and proton spectra measured by BESS. Paper presented at 30th International Cosmic Ray Conference, ICRC 2007, Merida, Yucatan, Mexico.4 p.

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title = "Solar Modulation of low-energy antiproton and proton spectra measured by BESS",

abstract = "The spectra of low-energy cosmic-ray protons and antiprotons have been measured by BESS in nine high-latitude balloon flights between 1993 and 2004. These measurements span a range of Solar activity from before the previous Solar minimum through Solar maximum and the onset of the present Solar minimum, as well as a Solar magnetic field reversal from positive to negative in 2000. Because protons and antiprotons differ only in charge sign, simultaneous measurements provide a sensitive probe of charge-dependent Solar modulation. The antiproton to proton ratio measured by BESS is consistent with simple spherically symmetric models of Solar modulation during the Sun's positive polarity phase, but requires charge-sign-dependent drift models during the negative phase. The BESS measurements are presented and compared to models of Solar modulation.",

author = "Mitchell, {J. W.} and K. Abe and H. Fuke and S. Haino and T. Hams and M. Hasegawa and A. Horikoshi and Kim, {K. C.} and Lee, {M. H.} and Y. Makida and S. Matsuda and A. Moiseev and J. Nishimura and M. Nozaki and R. Orito and S. Orito and Ormes, {J. F.} and K. Sakai and M. Sasaki and Seo, {E. S.} and Y. Shikaze and Streitmatter, {R. E.} and J. Suzuki and K. Tanaka and N. Thakur and T. Yamagami and A. Yamamoto and T. Yoshida and K. Yoshimura",

year = "2007",

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TY - CONF

T1 - Solar Modulation of low-energy antiproton and proton spectra measured by BESS

AU - Mitchell, J. W.

AU - Abe, K.

AU - Fuke, H.

AU - Haino, S.

AU - Hams, T.

AU - Hasegawa, M.

AU - Horikoshi, A.

AU - Kim, K. C.

AU - Lee, M. H.

AU - Makida, Y.

AU - Matsuda, S.

AU - Moiseev, A.

AU - Nishimura, J.

AU - Nozaki, M.

AU - Orito, R.

AU - Orito, S.

AU - Ormes, J. F.

AU - Sakai, K.

AU - Sasaki, M.

AU - Seo, E. S.

AU - Shikaze, Y.

AU - Streitmatter, R. E.

AU - Suzuki, J.

AU - Tanaka, K.

AU - Thakur, N.

AU - Yamagami, T.

AU - Yamamoto, A.

AU - Yoshida, T.

AU - Yoshimura, K.

PY - 2007

Y1 - 2007

N2 - The spectra of low-energy cosmic-ray protons and antiprotons have been measured by BESS in nine high-latitude balloon flights between 1993 and 2004. These measurements span a range of Solar activity from before the previous Solar minimum through Solar maximum and the onset of the present Solar minimum, as well as a Solar magnetic field reversal from positive to negative in 2000. Because protons and antiprotons differ only in charge sign, simultaneous measurements provide a sensitive probe of charge-dependent Solar modulation. The antiproton to proton ratio measured by BESS is consistent with simple spherically symmetric models of Solar modulation during the Sun's positive polarity phase, but requires charge-sign-dependent drift models during the negative phase. The BESS measurements are presented and compared to models of Solar modulation.

AB - The spectra of low-energy cosmic-ray protons and antiprotons have been measured by BESS in nine high-latitude balloon flights between 1993 and 2004. These measurements span a range of Solar activity from before the previous Solar minimum through Solar maximum and the onset of the present Solar minimum, as well as a Solar magnetic field reversal from positive to negative in 2000. Because protons and antiprotons differ only in charge sign, simultaneous measurements provide a sensitive probe of charge-dependent Solar modulation. The antiproton to proton ratio measured by BESS is consistent with simple spherically symmetric models of Solar modulation during the Sun's positive polarity phase, but requires charge-sign-dependent drift models during the negative phase. The BESS measurements are presented and compared to models of Solar modulation.

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M3 - Paper

AN - SCOPUS:84899526162

SP - 455

EP - 458

T2 - 30th International Cosmic Ray Conference, ICRC 2007

Y2 - 3 July 2007 through 11 July 2007

ER -