@article{072ebc1ca9ad49b09f9310fd0b280182,
title = "Measurements of 0.2-20 GeV/n cosmic-ray proton and helium spectra from 1997 through 2002 with the BESS spectrometer",
abstract = "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 carried out with the BESS spectrometer launched on a balloon at Lynn Lake, Canada. A calculation for the correction of secondary particle backgrounds from the overlying atmosphere was improved by using the measured spectra at small atmospheric depths ranging from 5 through 37 g/cm2. The uncertainties including statistical and systematic errors of the obtained spectra at the top of atmosphere are 5-7% for protons and 6-9% for helium nuclei in the energy range 0.5-5 GeV/n.",
keywords = "Atmospheric proton, Cosmic-ray helium, Cosmic-ray proton, Solar modulation, Superconducting spectrometer",
author = "Y. Shikaze and S. Haino and K. Abe and H. Fuke and T. Hams and Kim, {K. C.} and Y. Makida and S. Matsuda and Mitchell, {J. W.} and Moiseev, {A. A.} and J. Nishimura and M. Nozaki and S. Orito and Ormes, {J. F.} and T. Sanuki and M. Sasaki and Seo, {E. S.} and Streitmatter, {R. E.} and J. Suzuki and K. Tanaka and T. Yamagami and A. Yamamoto and T. Yoshida and K. Yoshimura",
note = "Funding Information: We thank the NASA/GSFC/WFF Balloon office and the NSBF for the balloon expedition, and KEK and ISAS for various support. We are indebted to S.Yanagita and S.Miyake of Ibaraki University for their kindest cooperation of theoretical interpretations. This work was supported in Japan by Grant-in-Aid for Scientific Research, MEXT and by Heiwa Nakajima Foundation and JSPS in Japan, and by NASA in the USA. Analysis was performed using the computing facilities at ICEPP, the University of Tokyo. Funding Information: , University of Chicago, “National Science Foundation Grant ATM-9613963”. ",
year = "2007",
month = sep,
doi = "10.1016/j.astropartphys.2007.05.001",
language = "English",
volume = "28",
pages = "154--167",
journal = "Astroparticle Physics",
issn = "0927-6505",
publisher = "Elsevier",
number = "1",
}