10 papers
Measurements of Primary and Atmospheric Cosmic-Ray Spectra with the BESS-TeV Spectrometer
S. Haino, T. Sanuki, K. Abe +30
Primary and atmospheric cosmic-ray spectra were precisely measured with the BESS-TeV spectrometer. The spectrometer was upgraded from BESS-98 to achieve seven times higher resoluti…
Measurement of Cosmic-Ray Proton and Antiproton Spectra at Mountain Altitude
T. Sanuki, M. Fujikawa, H. Matsunaga +22
Cosmic-ray proton and antiproton spectra were measured at mountain altitude, 2770 m above sea level. We observed more than 2 x 10^5 protons and 10^2 antiprotons in a kinetic energy…
Measurements of atmospheric muon spectra at mountain altitude
T. Sanuki, M. Fujikawa, K. Abe +26
We report new measurements of the atmospheric muons at mountain altitude. The measurement was carried out with the BESS detector at the top of Mt. Norikura, Japan. The altitude is…
Measurements of Cosmic-ray Low-energy Antiproton and Proton Spectra in a Transient Period of the Solar Field Reversal
Y. Asaoka, Y. Shikaze, K. Abe +39
The energy spectra of cosmic-ray low-energy antiprotons and protons have been measured by BESS in 1999 and 2000, during a period covering the solar magnetic field reversal. Based o…
Measurement of low-energy antiproton detection efficiency in BESS below 1 GeV
Y. Asaoka, K. Yoshimura, T. Yoshida +22
An accelerator experiment was performed using a low-energy antiproton beam to measure antiproton detection efficiency of BESS, a balloon-borne spectrometer with a superconducting s…
Successive Measurements of Cosmic-Ray Antiproton Spectrum in a Positive Phase of the Solar Cycle
T. Maeno, S. Orito, H. Matsunaga +1
The energy spectrum of cosmic-ray antiprotons has been measured by BESS successively in 1993, 1995, 1997 and 1998. In total, 848 antiprotons were clearly identified in energy range…