Abe, K., Fuke, H., Haino, S., Hams, T., Itazaki, A., Kim, K. C., ...
The BESS-Polar spectrometer had its first successful balloon flight over Antarctica in December 2004. During the 8.5-day long-duration flight, almost 0.9 billion events were recorded and 1,520...
Tanimura, Y., Saegusa, J., Shikaze, Y., Tsutsumi, M., Shimizu, S., Yoshizawa, M.
The 8 and 27 keV monoenergetic neutron calibration fields have been developed by using 45Sc(p, n)45Ti reaction. Protons from a 4-MV Pelletron accelerator are used to bombard a thin scandium target...
Shikaze, Y., Tanimura, Y., Saegusa, J., Tsutsumi, M., Yamaguchi, Y., Uchita, Y.
Evaluation of the properties for quasi-monoenergetic neutron calibration fields of high energies more than 20 MeV at TIARA is proceeding for development of the field. Among the properties needed for...
Shikaze, Y., Haino, S., Abe, K., Fuke, H., Hams, T., Kim, K. C., ...
We measured low energy cosmic-ray proton and helium spectra in the kinetic energy range 0.215 - 21.5 GeV/n at different solar activities during a period from 1997 to 2002. The observations were...
Measurements of Atmospheric Antiprotons (2005)
Yamato, K., Abe, K., Fuke, H., Haino, S., Makida, Y., Matsuda, S., ...
We measured atmospheric antiproton spectra in the energy range 0.2 to 3.4 GeV, at sea level and at balloon altitude in the atmospheric depth range 4.5 to 26 g/cm^2. The observed energy spectra,...
Search for Cosmic-Ray Antideuterons (2005)
Fuke, H., Maeno, T., Abe, K., Haino, S., Makida, Y., Matsuda, S., ...
We performed a search for cosmic-ray antideuterons using data collected during four BESS balloon flights from 1997 to 2000. No candidate was found. We derived, for the first time, an upper limit of...
Measurements of Primary and Atmospheric Cosmic-Ray Spectra with the BESS-TeV Spectrometer (2004)
Haino, S., Sanuki, T., Abe, K., Anraku, K., Asaoka, Y., Fuke, H., ...
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 resolution in momentum...
Measurement of Cosmic-Ray Proton and Antiproton Spectra at Mountain Altitude (2003)
Sanuki, T., Fujikawa, M., Matsunaga, H., Abe, K., Anraku, K., Fuke, H., ...
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 range between 0.25...
Measurement of Cosmic-Ray Proton, Antiproton and Muon Spectra at Mountain Altitude (2003)
Sanuki, T., Fujikawa, M., Abe, K., Anraku, K., Fuke, H., Haino, S., ...
Measurement of cosmic-ray proton, antiproton and muon spectra was carried out at mountain altitude. We observed 2 x 10^5 protons and 10^2 antiprotons in a kinetic energy region of 0.25 -- 3.3 GeV....
Abe, K., Sanuki, T., Anraku, K., Asaoka, Y., Fuke, H., Haino, S., ...
The cosmic-ray proton, helium, and muon spectra at small atmospheric depths of 4.5 -- 28 g/cm^2 were precisely measured during the slow descending period of the BESS-2001 balloon flight. The...
Measurements of atmospheric muon spectra at mountain altitude (2002)
Sanuki, T., Fujikawa, M., Abe, K., Anraku, K., Asaoka, Y., Fuke, H., ...
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 2,770 m above sea...
Precise Measurements of Atmospheric Muon Fluxes with the BESS Spectrometer (2002)
Motoki, M., Sanuki, T., Orito, S., Abe, K., Anraku, K., Asaoka, Y., ...
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...
Asaoka, Y., Shikaze, Y., Abe, K., Anraku, K., Fujikawa, M., Fuke, H., ...
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 on these...
Measurement of low-energy antiproton detection efficiency in BESS below 1 GeV (2001)
Asaoka, Y., Yoshimura, K., Yoshida, T., Abe, K., Anraku, K., Fujikawa, M., ...
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 solenoid. Measured...
Precise Measurement of Cosmic-Ray Proton and Helium Spectra with the BESS Spectrometer (2000)
Sanuki, T., Motoki, M., Matsumoto, H., Seo, E. S., Wang, J. Z., Abe, K., ...
We report cosmic-ray proton and helium spectra in energy ranges of 1 to 120 GeV and 1 to 54 GeV/nucleon, respectively, measured by a balloon flight of the BESS spectrometer in 1998. The...
Large-Area Scintillator Hodoscope with 50 ps Timing Resolution Onboard BESS (2000)
Shikaze, Y., Orito, S., Mitsui, T., Yoshimura, K., Matsumoto, H., Matsunaga, H., ...
We describe the design and performance of a large-area scintillator hodoscope onboard the BESS rigidity spectrometer; an instrument with an acceptance of 0.3 m^{2}sr. The hodoscope is configured such...
Precision Measurement of Cosmic-Ray Antiproton Spectrum (1999)
Orito, S., Maeno, T., Matsunaga, H., Abe, K., Anraku, K., Asaoka, Y., ...
The energy spectrum of cosmic-ray antiprotons has been measured in the range 0.18 to 3.56 GeV, based on 458 antiprotons collected by BESS in recent solar-minimum period. We have detected for the...