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 |
|---|---|
| Title of host publication | Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007 |
| Publisher | Universidad Nacional Autonoma de Mexico |
| Pages | 455-458 |
| Number of pages | 4 |
| Volume | 1 |
| Edition | SH |
| Publication status | Published - 2007 |
| Externally published | Yes |
| 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 |
Fingerprint
ASJC Scopus subject areas
- Nuclear and High Energy Physics
Cite this
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, Koji.
Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007. Vol. 1 SH. ed. Universidad Nacional Autonoma de Mexico, 2007. p. 455-458.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
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, Koji
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.
UR - http://www.scopus.com/inward/record.url?scp=84899526162&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84899526162&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84899526162
VL - 1
SP - 455
EP - 458
BT - Proceedings of the 30th International Cosmic Ray Conference, ICRC 2007
PB - Universidad Nacional Autonoma de Mexico
ER -