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  2. Tetsuya Yoshida

Tetsuya Yoshida

  (吉田 哲也)

Profile Information

Affiliation
Professor, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
Professor, School of Physical Sciences, The Graduate University for Advanced Studies
Visiting Professor, Graduate School of Science and Engineering, Aoyama Gakuin University
Degree
Doctor of Science(Feb, 1991, The University of Tokyo)
J-GLOBAL ID
200901011121067404
researchmap Member ID
1000013960

「初期宇宙の素粒子的描像での理解」を目指して低エネルギー反粒子宇宙線観測気球実験に参画。2006年からは自ら気球実験を実施してきた経験をベースに，日本で唯一気球実験を運営しているJAXA宇宙科学研究所の教授に着任し，大気球実験の実施責任者として大学の研究者等による宇宙科学研究を推進している。大気球，観測ロケットといった小型飛翔体による科学成果の創出に加えて宇宙科学研究を場とした幅広い人材育成への貢献にも取り組んでいる。

Major Research Interests

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Research Areas

 2

Research History

 7
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Education

 2

Committee Memberships

 7
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Awards

 1

Major Papers

 195
  • K. Sakai, H. Fuke, K. Yoshimura, M. Sasaki, K. Abe, S. Haino, T. Hams, M. Hasegawa, K. C. Kim, M. H. Lee, Y. Makida, J. W. Mitchell, J. Nishimura, M. Nozaki, R. Orito, J. F. Ormes, E. S. Seo, R. E. Streitmatter, N. Thakur, A. Yamamoto, T. Yoshida
    Physical Review Letters, 132(13), Mar 25, 2024  Peer-reviewed
  • 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., Myers, Z., Nishimura, J., Nozaki, M., Orito, R., Ormes, J.F., Sakai, K., Sasaki, M., Seo, E.S., Shikaze, Y., Shinoda, R., Streitmatter, R.E., Suzuki, J., Takasugi, Y., Takeuchi, K., Tanaka, K., Thakur, N., Yamagami, T., Yamamoto, A., Yoshida, T., Yoshimura, K.
    Physical Review Letters, 108(13) 131301, Mar, 2012  Peer-reviewed
    In two long-duration balloon flights over Antarctica, the Balloon-borne Experiment with a Superconducting Spectrometer (BESS) collaboration has searched for antihelium in the cosmic radiation with the highest sensitivity reported. BESS-Polar I flew in 2004, observing for 8.5 days. BESS-Polar II flew in 2007-2008, observing for 24.5 days. No antihelium candidate was found in BESS-Polar I data among 8.4 x 10(6) vertical bar Z vertical bar = 2 nuclei from 1.0 to 20 GV or in BESS-Polar II data among 4: 0 x 10(7) vertical bar Z vertical bar = 2 nuclei from 1.0 to 14 GV. Assuming antihelium to have the same spectral shape as helium, a 95% confidence upper limit to the possible abundance of antihelium relative to helium of 6.9 x 10(-8) was determined combining all BESS data, including the two BESS-Polar flights. With no assumed antihelium spectrum and a weighted average of the lowest antihelium efficiencies for each flight, an upper limit of 1.0 x 10(-7) from 1.6 to 14 GV was determined for the combined BESS-Polar data. Under both antihelium spectral assumptions, these are the lowest limits obtained to date.
  • Abe, K., Fuke, H., Haino, S., Hams, T., Hasegawa, M., Horikoshi, A., Kim, K.C., Kusumoto, A., Lee, M.H., Makida, Y., Matsuda, S., Matsukawa, Y., Mitchell, J.W., Nishimura, J., Nozaki, M., Orito, R., Ormes, J.F., Sakai, K., Sasaki, M., Seo, E.S., Shinoda, R., Streitmatter, R.E., Suzuki, J., Tanaka, K., Thakur, N., Yamagami, T., Yamamoto, A., Yoshida, T., Yoshimura, K.
    Physical Review Letters, 108(5) 51102, Jan, 2012  Peer-reviewed
    The energy spectrum of cosmic-ray antiprotons ((p) over bar 's) from 0.17 to 3.5 GeV has been measured using 7886 (p) over bar 's detected by BESS-Polar II during a long-duration flight over Antarctica near solar minimum in December 2007 and January 2008. This shows good consistency with secondary (p) over bar calculations. Cosmologically primary (p) over bar 's have been investigated by comparing measured and calculated (p) over bar spectra. BESS-Polar II data show no evidence of primary (p) over bar 's from the evaporation of primordial black holes.
  • Shikaze, Y., Haino, S., Abe, K., Fuke, H., Hams, T., Kim, K.C., Makida, Y., Matsuda, S., Mitchell, J.W., Moiseev, A.A., Nishimura, J., Nozaki, M., Orito, S., Ormes, J.F., Sanuki, T., Sasaki, M., Seo, E.S., Streitmatter, R.E., Suzuki, J., Tanaka, K., Yamagami, T., Yamamoto, A., Yoshida, T., Yoshimura, K.
    Astroparticle Physics, 28(1) 154-167, Sep, 2007  Peer-reviewed
    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/cm(2). 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. (C) 2007 Elsevier B.V. All rights reserved.
  • Abe, K., Sanuki, T., Anraku, K., Asaoka, Y., Fuke, H., Haino, S., Ikeda, N., Imori, M., Izumi, K., Maeno, T., Makida, Y., Matsuda, S., Matsui, N., Matsukawa, T., Matsumoto, H., Mitchell, J.W., Moiseev, A.A., Nishimura, J., Nozaki, M., Orito, S., Ormes, J.F., Sasaki, M., Seo, E.S., Shikaze, Y., Sonoda, T., Streitmatter, R.E., Suzuki, J., Tanaka, K., Tanizaki, K., Yamagami, T., Yamamoto, A., Yamamoto, Y., Yamato, K., Yoshida, T., Yoshimura, K.
    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 645(5-6) 472-475, Feb, 2007  Peer-reviewed
  • Yamato, K., Abe, K., Fuke, H., Haino, S., Makida, Y., Matsuda, S., Matsumoto, H., Mitchell, J.W., Moiseev, A.A., Nishimura, J., Nozaki, M., Orito, S., Ormes, J.F., Sanuki, T., Sasaki, M., Seo, E.S., Shikaze, Y., Streitmatter, R.E., Suzuki, J., Tanaka, K., Yamagami, T., Yamamoto, A., Yoshida, T., Yoshimura, K.
    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 632(4) 475-479, Jan, 2006  Peer-reviewed
    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, including our previous measurements at mountain altitude, were compared with estimated spectra calculated on various assumptions regarding the energy distribution of antiprotons that interacted with air nuclei. (c) 2005 Elsevier B.V. All rights reserved.
  • Fuke, H., Maeno, T., Abe, K., Haino, S., Makida, Y., Matsuda, S., Matsumoto, H., 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., Tanizaki, K., Yamagami, T., Yamamoto, A., Yamamoto, Y., Yamato, K., Yoshida, T., Yoshimura, K.
    Physical Review Letters, 95(8) 81101, Aug, 2005  Peer-reviewed
    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 1.9x10(-4) (m(2)s sr GeV/nucleon)(-1) for the differential flux of cosmic-ray antideuterons, at the 95% confidence level, between 0.17 and 1.15 GeV/nucleon at the top of the atmosphere.
  • Haino, S., Sanuki, T., Abe, K., Anraku, K., Asaoka, Y., Fuke, H., Imori, M., Itasaki, A., Maeno, T., Makida, Y., Matsuda, S., Matsui, N., Matsumoto, H., 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., Takasugi, Y., Tanaka, K., Tanizaki, K., Yamagami, T., Yamamoto, A., Yamamoto, Y., Yamato, K., Yoshida, T., Yoshimura, K.
    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 594(1-2) 35-46, Jul, 2004  Peer-reviewed
    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. We report absolute fluxes of primary protons and helium nuclei in the energy ranges, 1-540 GeV and 1-250 GeV/n, respectively, and absolute flux of atmospheric muons in the momentum range 0.6-400 GeV/c. (C) 2004 Elsevier B.V. All rights reserved.
  • Sanuki, T., Fujikawa, M., Abe, K., Anraku, K., Asaoka, Y., Fuke, H., Haino, S., Imori, M., Izumi, K., Maeno, T., Makida, Y., Matsui, N., Matsumoto, H., Matsunaga, H., Motoki, M., Nishimura, J., Nozaki, M., Orito, S., Sasaki, M., Shikaze, Y., Sonoda, T., Suzuki, J., Tanaka, K., Toki, Y., Yamamoto, A., Yamamoto, Y., Yamato, K., Yoshida, T., Yoshimura, K.
    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 581(3-4) 272-273, Feb, 2004  
  • Sanuki, T., Fujikawa, M., Matsunaga, H., Abe, K., Anraku, K., Fuke, H., Haino, S., Imori, M., Izumi, K., Maeno, T., Makida, Y., Matsui, N., Matsumoto, H., Nishimura, J., Nozaki, M., Orito, S., Sasaki, M., Shikaze, Y., Suzuki, J., Tanaka, K., Yamamoto, A., Yamamoto, Y., Yamato, K., Yoshida, T., Yoshimura, K.
    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 577(1-2) 10-17, Dec, 2003  Peer-reviewed
    Energy spectra of atmospheric secondary cosmic-ray protons and antiprotons were measured at mountain altitude, 2770 m above sea level. We observed more than 10(5) protons and 10(2) antiprotons. Our proton spectrum is generally consistent with other previous measurements. The observed antiproton spectrum suggests that the energy loss due to non-annihilation processes is less significant than that assumed in previous model calculations. (C) 2003 Published by Elsevier B.V.
  • Y Asaoka, Y Shikaze, K Abe, K Anraku, M Fujikawa, H Fuke, S Haino, M Imori, K Izumi, T Maeno, Y Makida, S Matsuda, N Matsui, T Matsukawa, H Matsumoto, H Matsunaga, J Mitchell, T Mitsui, A Moiseev, M Motoki, J Nishimura, M Nozaki, S Orito, JF Ormes, T Saeki, T Sanuki, M Sasaki, ES Seo, T Sonoda, R Streitmatter, J Suzuki, K Tanaka, K Tanizaki, Ueda, I, JZ Wang, Y Yajima, Y Yamagami, A Yamamoto, Y Yamamoto, K Yamato, T Yoshida, K Yoshimura
    PHYSICAL REVIEW LETTERS, 88(5) 51101, Feb, 2002  Peer-reviewed
    The energy spectra of cosmic-ray low-energy antiprotons ((p) over bar 's) and protons (p's) have been measured by BESS in 1999 and 2000, during a period covering reversal at the solar magnetic field. Based an these measurements, a sudden increase of the (p) over bar /p flux ratio following the solar magnetic field reversal was observed, and it generally agrees with a drift model of the solar modulation.
  • H Matsunaga, S Orito, H Matsumoto, K Yoshimura, A Moiseev, K Anraku, R Golden, M Imori, Y Makida, J Mitchell, M Motoki, J Nishimura, M Nozaki, J Ormes, T Saeki, T Sanuki, R Streitmatter, J Suzuki, K Tanaka, Ueda, I, N Yajima, T Yamagami, A Yamamoto, T Yoshida
    PHYSICAL REVIEW LETTERS, 81(19) 4052-4055, Nov, 1998  Peer-reviewed
    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 1995 data. The resultant energy spectrum appears to be flat below 1 GeV, compatible with a possible admixture of primary antiproton component with a soft energy spectrum, while the possibility of secondary antiprotons alone explaining the data cannot be excluded with the present accuracy. Further improvement of statistical accuracy and extension of the energy range are planned in future BESS flights. [S0031-9007(98)07573-5].
  • Saeki, T., Anraku, K., Orito, S., Ormes, J., Imori, M., Kimbell, B., Makida, Y., Matsumoto, H., Matsunaga, H., Mitchell, J., Motoki, M., Nishimura, J., Nozaki, M., Otoba, M., Sanuki, T., Streitmatter, R., Suzuki, J., Tanaka, K., Ueda, I., Yajima, N., Yamagami, T., Yamamoto, A., Yoshida, T., Yoshimura, K.
    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 422(1-4) 319-324, Mar, 1998  Peer-reviewed
    A very sensitive search for cosmic-ray antihelium was performed using data obtained from three scientific flights of the BESS magnetic rigidity spectrometer. We have not observed any antihelium; this places a model-independent upper limit (95% C.L.) on the antihelium flux of 6 x 10(-4) m(-2)sr(-1)s(-1) at the top of the atmosphere in the rigidity region 1 to 16 GV, after correcting for the estimated interaction loss of antihelium in the air and in the instrument. The corresponding upper limit on the <(He)over bar>/He flux ratio is 3.1 x 10(-6), 30 times more stringent than the limits obtained in similar rigidity regions with magnetic spectrometers previous to BESS. (C) 1998 Published by Elsevier Science B.V.
  • Yoshimura, K., Orito, S., Ueda, I., Anraku, K., Golden, R., Imori, M., Inaba, S., Kimbell, B., Kimura, N., Makida, Y., Matsumoto, H., Matsunaga, H., Mitchell, J., Motoki, M., Nishimura, J., Nozaki, M., Ormes, J., Saeki, T., Streitmatter, R., Suzuki, J., Tanaka, K., Yajima, N., Yamagami, T., Yamamoto, A., Yoshida, T.
    Physical Review Letters, 75(21) 3792-3795, Nov, 1995  Peer-reviewed
    A search for cosmic-ray antiprotons was performed using a balloon-borne experiment with a superconducting magnetic rigidity spectrometer (BESS). We have detected four antiprotons in the kinetic energy range between 300 and 500 MeV, the first antiprotons to be identified by a direct mass measurement. The corresponding (p) over bar/p flux ratio at the top of the atmosphere is found to be 1.2(-0.65)(+1.0) X 10(-5). No antiprotons were observed in the range between 175 and 300 MeV, resulting in a 90% C.L. upper limit on the flux ratio of 2.9 X 10(-5).
  • M. Z. Akrawy, G. Alexander, J. Allison, P. P. Allport, K. J. Anderson, J. C. Armitage, G. T.J. Arnison, P. Ashton, G. Azuelos, J. T.M. Baines, A. H. Ball, J. Banks, G. J. Barker, R. J. Barlow, J. R. Batley, J. Becker, T. Behnke, K. W. Bell, G. Bella, S. Bethke, O. Biebel, U. Binder, I. J. Bloodworth, P. Bock, H. Breuker, R. M. Brown, R. Brun, A. Buijs, H. J. Burckhart, P. Capiluppi, R. K. Carnegie, A. A. Carter, J. R. Carter, C. Y. Chang, D. G. Charlton, J. T.M. Chrin, P. E.L. Clarke, I. Cohen, W. J. Collins, J. E. Conboy, M. Couch, M. Coupland, M. Cuffiani, S. Dado, G. M. Dallavalle, P. Debu, M. M. Deninno, A. Dieckmann, M. Dittmar, M. S. Dixit, E. Duchovni, I. P. Duerdoth, D. J.P. Dumas, H. El Mamouni, P. A. Elcombe, P. G. Estabrooks, E. Etzion, F. Fabbri, P. Farthouat, H. M. Fischer, D. G. Fong, M. T. French, C. Fukunaga, A. Gaidot, O. Ganel, J. W. Gary, J. Gascon, N. I. Geddes, C. N.P. Gee, C. Geich-Gimbel, S. W. Gensler, F. X. Gentit, G. Giacomelli, V. Gibson, W. R. Gibson, J. D. Gillies, J. Goldberg, M. J. Goodrick, W. Gorn, D. Granite, E. Gross, J. Grunhaus, H. Hagedorn, J. Hagemann, M. Hansroul, C. K. Hargrove, I. Harrus, J. Hart, P. M. Hattersley, M. Hauschild, C. M. Hawkes, E. Heflin, R. J. Hemingway, R. D. Heuer, J. C. Hill, S. J. Hillier, C. Ho, J. D. Hobbs, P. R. Hobson, D. Hochman, B. Holl, R. J. Homer, S. R. Hou, C. P. Howarth, R. Humbert, R. E. Hughes-Jones, P. Igo-Kemenes, H. Ihssen, D. C. Imrie, A. Jawahery, P. W. Jeffreys, H. Jeremie, M. Jimack, M. Jobes, R. W.L. Jones, P. Jovanovic, D. Karlen, K. Kawagoe, T. Kawamoto, R. G. Kellogg, B. W. Kennedy, C. Kleinwort, D. E. Klem, G. Knop, T. Kobayashi, T. P. Kokott, L. Köpke, R. Kowalewski, H. Kreutzmann, J. Kroll, M. Kuwano, P. Kyberd, G. D. Lafferty, F. Lamarche, W. J. Larson, J. G. Layter, P. Le Du, P. Leblanc, A. M. Lee, M. H. Lehto, D. Lellouch, P. Lennert, L. Lessard, L. Levinson, S. L. Lloyd, F. K. Loebinger, J. M. Lorah, B. Lorazo, M. J. Losty, J. Ludwig, J. Ma, A. A. Macbeth, M. Mannelli, S. Marcellini, G. Maringer, A. J. Martin, J. P. Martin, T. Mashimo, P. Mättig, U. Maur, T. J. McMahon, J. R. McNutt, A. C. McPherson, F. Meijers, D. Menszner, F. S. Merritt, H. Mes, A. Michelini, R. P. Middleton, G. Mikenberg, D. J. Miller, C. Milstene, M. Minowa, W. Mohr, A. Montanari, T. Mori, M. W. Moss, P. G. Murphy, W. J. Murray, B. Nellen, H. H. Nguyen, M. Nozaki, A. J.P. O'Dowd, S. W. O'Neale, B. P. O'Neill, F. G. Oakham, F. Odorici, M. Ogg, H. Oh, M. J. Oreglia, S. Orito, J. P. Pansart, G. N. Patrick, S. J. Pawley, P. Pfister, J. E. Pilcher, J. L. Pinfold, D. E. Plane, B. Poli, A. Pouladdej, T. W. Pritchard, G. Quast, J. Raab, M. W. Redmond, D. L. Rees, M. Regimbald, K. Riles, C. M. Roach, S. A. Robins, A. Rollnik, J. M. Roney, S. Rossberg, A. M. Rossi, P. Routenburg, K. Runge, O. Runolfsson, S. Sanghera, R. A. Sansum, M. Sasaki, B. J. Saunders, A. D. Schaile, O. Schaile, W. Schappert, P. Scharff-Hansen, S. Schreiber, J. Schwarz, A. Shapira, B. C. Shen, P. Sherwood, A. Simon, P. Singh, G. P. Siroli, A. Skuja, A. M. Smith, T. J. Smith, G. A. Snow, R. W. Springer, M. Sproston, K. Stephens, H. E. Stier, R. Ströhmer, D. Strom, H. Takeda, T. Takeshita, T. Tsukamoto, M. F. Turner, G. Tysarczyk-Niemeyer, D. Van den plas, G. J. Van Dalen, G. Vasseur, C. J. Virtue, H. von der Schmitt, J. von Krogh, A. Wagner, C. Wahl, C. P. Ward, D. R. Ward, J. Waterhouse, P. M. Watkins, A. T. Watson, N. K. Watson, M. Weber, S. Weisz, P. S. Wells, N. Wermes, M. Weymann, G. W. Wilson, J. A. Wilson, I. Wingerter, V-H. Winterer, N. C. Wood, S. Wotton, B. Wuensch, T. R. Wyatt, R. Yaari, Y. Yang, G. Yekutieli, T. Toshida, W. Zeuner, G. T. Zorn
    Physics Letters B, 248(1-2) 211-219, Sep 27, 1990  Peer-reviewed
    A search has been performed for the production of neutralinos (χ, χ′) in e+e- annihilation at energies near the Z0 pole. No evidence for these particles was found either in searches for events with two acoplanar jets, low visible energy, and missing pt (sensitive to Z0→χχ′→χχff) or in searches for single-photon events (sensitive to Z0→χχ′→χχγ). Model independent upper limits (at the 95% CL) on the branching ratio for the decay mode Z0 →χχ′ of a few 10-4 are obtained for most of the range of neutralino masses that is kinematically accessible at LEP energies. Upper limits on the mixing factor of neutralinos are also placed as a function of the neutralino masses. © 1990.
  • Akrawy, M.Z., Alex, er, G., Allison, J., Allport, P.P., Anderson, K.J., Armitage, J.C., Arnison, G.T.J., Ashton, P., Azuelos, G., Baines, J.T.M., Ball, A.H., Banks, J., Barker, G.J., Barlow, R.J., Batley, J.R., Becker, J., Behnke, T., Bell, K.W., Bella, G., Bethke, S., Biebel, O., Binder, U., Bloodworth, I.J., Bock, P., Breuker, H., Brown, R.M., Brun, R., Buijs, A., Burckhart, H.J., Capiluppi, P., Carnegie, R.K., Carter, A.A., Carter, J.R., Chang, C.Y., Charlton, D.G., Chrin, J.T.M., Cohen, I., Collins, W.J., Conboy, J.E., Couch, M., Coupl, , M., Cuffiani, M., Dado, S., Dallavalle, G.M., Debu, P., Deninno, M.M., Dieckmann, A., Dittmar, M., Dixit, M.S., Duchovni, E., Duerdoth, I.P., Dumas, P., el Mamouni, H., Elcombe, P.A., Estabrooks, P.G., Etzion, E., Fabbri, F., Farthouat, P., Fischer, H.M., Fong, D.G., French, M.T., Fukunuga, C., Gaidot, A., Ganel, O., Gary, J.W., Gascon, J., Geddes, N.I., Gee, C.N.P., Geich-Gimbel, C., Gensler, S.W., Gentit, F.X., Giacomelli, G., Gibson, V., Gibson, W.R., Gillies, J.D., Goldberg, J., Goodrick, M.J., Gorn, W., Granite, D., Gross, E., Grosse-Wiesmann, P., Grunhaus, J., Hagedorn, H., Hagemann, J., Hansroul, M., Hargrove, C.K., Hart, J., Hattersley, P.M., Hauschild, M., Hawkes, C.M., Helfin, E., Hemingway, R.J., Heuer, R.D., Hill, J.C., Hiller, S.J., Ho, C., Hobbs, J.D., Hobson, P.R., Hochman, D., Holl, B., Homer, R.J., Hou, S.R., Howarth, C.P., Hughes-Jones, R.E., Igo-Kimenes, P., Ihssen, H., Imrie, D.C., Jawahery, A., Jeffreys, P.W., Jeremie, H., Jimack, M., Jobes, M., Jones, R.W.L., Jovanovic, P., Karlen, D., Kawagoe, K., Kawamoto, T., Kellogg, R.G., Kennedy, B.W., Kleinwort, C., Klem, D.E., Knop, G., Kobayashi, T., Kokott, T.P., K{\"o}pke, L., Kowalewski, R., Kreutzmann, H., von Krogh, J., Kroll, J., Kuwano, M., Kyberd, P., Lafferty, G.D., Lamarche, F., Larson, W.J., Lasota, M.M.B., Layter, J.G., le Du, P., Leblanc, P., Lee, A.M., Lellouch, D., Lennert, P., Lessard, L., Levinson, L., Lloyd, S.L., Loebinger, F.K., Lorah, J.M., Lorazo, B., Losty, M.J., Ludwig, J., Lupu, N., Ma, J., Macbeth, A.A., Mannelli, M., Marcellini, S., Maringer, G., Martin, A.J., Martin, J.P., Mashimo, T., M{\"a}ttig, P., Maur, U., McMahon, T.J., McPherson, A.C., Meijers, F., Menszner, D., Merritt, F.S., Mes, H., Michelini, A., Middleton, R.P., Mikenberg, G., Miller, D.J., Milstene, C., Minowa, M., Mohr, W., Montanari, A., Mori, T., Moss, M.W., Murphy, P.G., Murray, W.J., Nellen, B., Nguyen, H.H., Nozaki, M., O{'}Dowd, A.J.P., O{'}neale, S.W., O{'}neill, B.P., Oakham, F.G., Odorici, F., Ogg, M., Oh, H., Oreglia, M.J., Orito, S., Pansart, J.P., Patrick, G.N., Pawley, S.J., Pfister, P., Pilcher, J.E., Pinfold, J.L., Plane, D.E., Poli, B., Pouladdej, A., Pritchard, T.W., Quast, G., Raab, J., Redmond, M.W., Rees, D.L., Regimbald, M., Riles, K., Roach, C.M., Robins, S.A., Rollnik, A., Roney, J.M., Rossberg, S., Rossi, A.M., Routenburg, P., Runge, K., Runolfsson, O., Sanghera, S., Sansum, R.A., Sasaki, M., Saunders, B.J., Schaile, A.D., Schaile, O., Schappert, W., Scharff-Hansen, P., von der Schmitt, H., Schreiber, S., Schwarz, J., Shapira, A., Shen, B.C., Sherwood, P., Simon, A., Siroli, G.P., Skuja, A., Smith, A.M., Smith, T.J., Snow, G.A., Spreadbury, E.J., Springer, R.W., Sproston, M., Stephens, K., Stier, H.E., Str{\"o}hmer, R., Strom, D., Takeda, H., Takeshita, T., Tsukamoto, T., Turner, M.F., Tysarczyk-Niemeyer, G., van den Plas, D., V, alen, G.J., Vasseur, G., Virtue, C.J., Wagner, A., Wahl, C., Ward, C.P., Ward, D.R., Waterhouse, J., Watkins, P.M., Watson, A.T., Watson, N.K., Weber, M., Weisz, S., Wermes, N., Weymann, M., Wilson, G.W., Wilson, J.A., Wingerter, I., Winterer, V.-H., Wood, N.C., Wotton, S., Wuensch, B., Wyatt, T.R., Yaari, R., Yang, Y., Yekutieli, G., Yoshida, T., Zeuner, W., Zorn, G.T.
    Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 242(2) 299-308, Jun, 1990  Peer-reviewed
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Misc.

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  • Yoshida Tetsuya
    Meeting abstracts of the Physical Society of Japan, 55(1) 61-61, Mar 10, 2000  
  • 「パリティ」, 15(12) 91-92, 2000  
  • 応用物理学会放射線分科会｢放射線｣, 25(4) 3-16, 1999  
  • A Moiseev, K Yoshimura, Ueda, I, K Anraku, R Golden, M Imori, S Inaba, B Kimbell, N Kimura, Y Makida, H Matsumoto, H Matsunaga, J Mitchell, M Motoki, J Nishimura, M Nozaki, S Orito, J Ormes, T Saeki, ES Seo, S Stochaj, R Streitmatter, J Suzuki, K Tanaka, N Yajima, T Yamagami, A Yamamoto, T Yoshida
    ASTROPHYSICAL JOURNAL, 482(2) 1087-1087, Jun, 1997  
  • Seo, E.S., Matsunaga, H., Anraku, K., Imori, M., Makida, Y., Matsumoto, H., McDonald, F.B., Mitchell, J., Moiseev, A., Motoki, M., Nishimura, J., Nozaki, M., Orito, S., Ormes, J.F., Otoba, M., Saeki, T., Sanuki, T., Streitmatter, R.E., Suzuki, J., Tanaka, K., Ueda, I., Wang, J.Z., Yajima, N., Yamagami, T., Yamamoto, A., Yoshida, T., Yoshimura, K.
    Advances in Space Research, 19(5) 751-754, 1997  
    The Balloon Bome Experiment with a Superconducting Solenoid Spectrometer (BESS) was flown annually in 1993, 1994, and 1995. In this report we present the energy spectra and isotopic composition of cosmic ray H and He measured from the 1993 flight. The low energy fluxes of H and He agree with the IMP-8 satellite data for a 26 day period (7/14/93 - 8/9/93) that overlapped the BESS flight. Both H-2 and He-3 were well separated from H-1 and He-4. The measured spectra were corrected for the atmospheric overburden and compared with the interstellar/heliospheric propagation calculations. (C) 1997 COSPAR.
  • Makida, Y., Anraku, K., Suzuki, J., Yamamoto, A., Yoshida, T., Yoshimura, K., Ueda, I., Saeki, T., Matsunaga, H., Orito, S., Nozaki, M., Imori, M., Motoki, M., Yajima, N., Righter, D.L.
    IEEE Transactions on Applied Superconductivity, 5(2) 658-661, Jun, 1995  
    A thin superconducting solenoid was launched by using a large balloon up to an altitude of 36.5 km in Northern Canada in the summer of 1993 as a core facility for the cosmic ray spectrometer, BESS. The magnet was excited up to 1.0 T in persistent current mode on the ground and was launched being attended with 2.7 G shocks. After 17 hours successful flight, it was discharged on the sky and made a mild descending and landing by using a parachute for recovery. The magnet was safely operated without problems during flight in 1993 and contributed to an second observation in the summer of 1994.
  • Yamamoto, A., Anraku, K., Golden, R., Haga, T., Higashi, Y., Imori, M., Inaba, S., Kimbell, B., Kimura, N., Makida, Y., Matsumoto, H., Matsunaga, H., Motoki, M., Nishimura, J., Nozaki, M., Orito, S., Saeki, T., Suzuki, J., Takimi, N., Tanaka, K., Ueda, I., Yajima, N., Yamagami, T., Yamamoto, A., Yoshida, T., Yoshimura, K.
    Advances in Space Research, 14(2) 75-87, 1994  
    A balloon-borne superconducting solenoidal magnet spectrometer, BESS, has been designed and developed to investigate cosmic-rays and particle-astrophysics. Search for primordial antimatter in cosmic-rays and observation of gamma-rays are primary objectives to study early history of the Universe. The cylindrical spectrometer configuration with a thin superconducting solenoid magnet is optimized to provide a large geometrical acceptance of 0.5-1.0 m(2)sr for these scientific objectives. The spectrometer system has been completed and is planned to be launched for the first scientific flight from Lynn Lake, Canada, in 1993. This report describes the progress of the spectrometer development and discuss about its capability to search for primordial antimatter in cosmic rays.
  • Imori M., Shimamura K., Anraku K., Inaba S., Nozaki M., Yamagami T., Yoshida T.
    31 37-45, Mar, 1993  
    A few hundred batteries are employed to supply electricity to an experimental apparatus borne on a balloon. It is important to keep the batteries under good quality control. To facilitate such control, a modular architecture has been introduced to the organization of the batteries and the structure of the electronic system in the apparatus. The system comprises subsystems called modules. Electricity is supplied to each module by floating power supplies made from a dedicated portion of the batteries. The modules are electrically isolated individually. A local network is employed to enhance the modularity of the system. The modules communicate through a single twisted-pair cable, a party-line bus to which the modules are connected through isolation transformers.
  • Anraku, K., Haga, T., Imori, M., Nozaki, M., Orito, S., Shimamura, K., Tsunoda, T., Yoshida, T., Yoshimura, K., Ajima, Y., Ikeda, H., Inaba, S., Haruyama, T., Higashi, Y., Makida, Y., Suzuki, J., Yamamoto, A., Nishimura, J., Yamagami, T., Golden, R., Kimbell, B.
    Advances in Space Research, 13(2) 169-172, Feb, 1993  
    A Balloon Experiment with Superconducting Spectrometer (BESS) to search for primordial anti-matter abundance in cosmic radiation and to measure anti-proton spectrum is being prepared. A large geometry factor of 1.2 m2sr was achieved by the solenoidal detector configuration. The magnet provides an uniform magnetic field of 1.2 tesla over a cylindrical volume of 0.85m in diameter and 1.0m in length. Anti-helium nuclei will be searched for to a level of anti-He/He is similar to 10(-8) and the low energy primary anti-proton flux will be observed down to anti-proton/proton is similar to 10(-6). The superconducting magnet has been constructed and excited to 1 tesla and showed good and stable performance. The main tracking device, jet type drift chamber, together with the readout electronics and data acquisition system have been assembled and tested. A flight to test the detector performance at the balloon altitude was successfully carried out in September 1989.
  • YOSHIDA T., ANRAKU K., IMORI M., ORITO S., SHIMAMURA K., NOZAKI M., HARA T., YAMAKAWA H., YAMAMOTO A., HARUYAMA T., HIGASHI Y., MAKITA Y., MITO T., YAMAGAMI T.
    23 127-136, Mar, 1989  
    We are preparing a series of balloon-borne experiments to search for anti-protons and anti-matter of cosmic origin. The thin model solenoid for the ASTROMAG project will be equipped with a cylindrical jet chamber resulting to a large solid angle of 1m^2 sr. Anti-helium will then be searched for to a flux level of 10^<-8> relative to the helium. Simultaneously, we can perform a very sensitive search for GeV γ-rays from point-sources. The energy spectra of the positrons and of various isotopes can be measured over a wide energy range. The detectors are now under construction. A prototype detector was launched from Sanriku in June 1988 and the total system worked as expected.

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