Publications (10)
Online monitoring system and data management for KamLAND
M. Motoki, F. Suekane, K. Tada +1
In January 22, 2002, KamLAND started the data-taking. The KamLAND detector is a complicated system which consists of liquid scintillator, buffer oil, spherical balloon and so on. I…
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…
Measurement of Low-Energy Cosmic-Ray Antiprotons at Solar Minimum
H. Matsunaga, S. Orito, H. Matsumoto +21
The absolute fluxes of the cosmic-ray antiprotons at solar minimum are measured in the energy range 0.18 to 1.4 GeV, based on 43 events unambiguously detected in BESS '95 data. The…
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…
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…
Precision Measurement of Cosmic-Ray Antiproton Spectrum
S. Orito, T. Maeno, H. Matsunaga +31
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 de…
Laboratory Studies on the Removal of Radon-Born Lead from KamLAND's Organic Liquid Scintillator
G. Keefer, C. Grant, A. Piepke +64
The removal of radioactivity from liquid scintillator has been studied in preparation of a low background phase of KamLAND. This paper describes the methods and techniques develope…
A New Limit on the Flux of Cosmic Antihelium
T. Saeki, K. Anraku, S. Orito +21
A very sensitive search for cosmic-ray antihelium was performed using data obtained from three scientific flights of BESS magnetic rigidity spectrometer. We have not observed any a…
Precise Measurements of Atmospheric Muon Fluxes with the BESS Spectrometer
M. Motoki, T. Sanuki, S. Orito +36
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 observat…
Precise Measurement of Cosmic-Ray Proton and Helium Spectra with the BESS Spectrometer
T. Sanuki, M. Motoki, H. Matsumoto +31
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…