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Your search keyword '"Shikaze, Y."' showing total 3 results
Start Over Author "Shikaze, Y." Topic astronomy
3 results on '"Shikaze, Y."'

1. Time Variations of Cosmic-Ray Helium Isotopes with BESS-Polar I

Author

Abe, K, Fuke, H, Haino, S, Hams, T, Hasegawa, M, Horikoshi, A, Itazaki, A, Kim, K. C, Kumazawa, T, Kusumoto, A, Lee, M. H, Makida, Y, Matsuda, S, Matsukawa, Y, Matsumoto, K, Mitchell, J. W, Moiseev, A. A, Nishimura, J, Nozaki, M, Orito, R, Ormes, J. F, Picot-Clemente, N, Sakai, K, Sasaki, M, Seo, E. S, Shikaze, Y, and Streitmatter, R. E

Subjects
Astronomy
Abstract

The Balloon-borne Experiment with a Superconducting Spectrometer (BESS) is configured with a solenoidal superconducting magnet and a suite of precision particle detectors, including time-of-flight hodoscopes based on plastic scintillators, a silica-aerogel Cherenkov detector, and a high resolution tracking system with a central jet-type drift chamber. The charges of incident particles are determined from energy losses in the scintillators. Their magnetic rigidities (momentum/charge) are measured by reconstructing each particle trajectory in the magnetic field, and their velocities are obtained by using the time-of-flight system. Together, these measurements can accurately identify helium isotopes among the incoming cosmic-ray helium nuclei up to energies in the GeV per nucleon region. The BESS-Polar I instrument flew for 8.5 days over Antarctica from December 13th to December 21st, 2004. Its long-duration flight and large geometric acceptance allow the time variations of isotopic fluxes to be studied for the first time. The time variations of helium isotope fluxes are presented here for rigidities from 1.2 to 2.5 GV and results are compared to previously reported proton data and neutron monitor data.

Published
2013
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2. Search for cosmic-ray antiproton origins and for cosmological antimatter with BESS

Author

Mitchell, J. W., Hams, T., Itazaki, A., Kim, K. C., Kumazawa, T., Lee, M. H., Matsumoto, K., Moiseev, A. A., Myers, Z., Ormes, J. F., Seo, E. S., Streitmatter, R. E., Takasugi, Y., Takeuchi, K., Thakur, N., BESS, Collaboration, Yamamoto, Akira, Yoshimura, Koji, Abe, Koh, Fuke, Hideyuki, Haino, S., Hasegawa, M., Horikoshi, A., Kusumoto, A., Makida, Y., Matsuda, S., Matsukawa, Y., Nishimura, Jun, Nozaki, M., Orito, R., Sakai, K., Sasaki, M., Shikaze, Y., Shinoda, R., Suzuki, J., Tanaka, K., Taniguchi, T., Yamagami, Takamasa, and Yoshida, Tetsuya

Subjects
Solar minimum, Physics, Atmospheric Science, Astrophysics::High Energy Astrophysical Phenomena, media_common.quotation_subject, High Energy Physics::Phenomenology, Dark matter, Aerospace Engineering, Astronomy, Astronomy and Astrophysics, Cosmic ray, Primordial black hole, Astrophysics, Universe, Geophysics, Space and Planetary Science, Antiproton, Antimatter, General Earth and Planetary Sciences, Space Science, media_common
Abstract

著者人数: 38名, 資料番号: SA1004102000

Published
2013

3. Search for fractionally charged particles in cosmic rays with the BESS spectrometer

Author

Fuke, H., Tasaki, Y., Abe, K., Haino, S., Makida, Y., Matsuda, S., Mitchell, J.W., Moiseev, A.A., Nishimura, J., Nozaki, M., Orito, S., Ormes, J.F., Sasaki, M., Seo, E.S., Shikaze, Y., Streitmatter, R.E., Suzuki, J., Tanaka, K., Yamagami, T., and Yamamoto, A.

Subjects
*ASTROPHYSICAL radiation, *COSMIC rays, *IONIZING radiation, *ASTRONOMY
Abstract

Abstract: Historically, there are been many searches for fractionally charged particles in the cosmic radiation. However, few searches have been performed near the top of the atmosphere. We performed a search for relativistic charged particles in cosmic rays using data collected during four BESS balloon flights from 1997 to 2000 carried out in northern Canada. The data were analyzed by examining energy deposition in the time-of-flight scintillator hodoscopes. No candidate was found. We derive an upper limit of 4.5×10−7 (cm2 ssr)−1 for the flux of charged particles, at the 90% confidence level. [Copyright &y& Elsevier]

Published
2008
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