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  2. 吉田 哲也

吉田 哲也

ヨシダ テツヤ  (Tetsuya Yoshida)

基本情報

所属
国立研究開発法人宇宙航空研究開発機構 宇宙科学研究所 教授
総合研究大学院大学 物理科学研究科 教授
青山学院大学 大学院理工学研究科 客員教授
学位
理学博士(1991年2月 東京大学)
J-GLOBAL ID
200901011121067404
researchmap会員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。

主要な研究キーワード

 25
もっとみる

研究分野

 2

経歴

 7
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学歴

 2

委員歴

 7
もっとみる

受賞

 1

主要な論文

 209
  • 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) 2024年3月25日  査読有り
  • 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 2012年3月  査読有り
    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 2012年1月  査読有り
    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 2007年9月  査読有り
    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 2007年2月  査読有り
  • 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 2006年1月  査読有り
    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.
  • Phys. Rev. Lett. 95(8) 81101 2005年8月  査読有り
  • Phys. Lett. B 594(1-2) 35-46 2004年7月  査読有り
  • 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 2004年2月  
  • SANUKI T, FUJIKAWA M, MATSUNAGA H, ABE K, MAENO T, MAKIDA Y, NOZAKI M, SASAKI M, SUZUKI J
    Phys. Lett. B 577(1-2) 10-17 2003年12月  査読有り
  • Phys. Rev. Lett. 88(5) 51101 2002年2月  査読有り
  • MATSUNAGA H, MATSUMOTO H, GOLDEN R, MITCHELL J, NOZAKI M, STREITMATTER R, SUZUKI J, YAMAGAMI T, YOSHIDA T
    Phys. Rev. Lett. 81(19) 4052-4055 1998年11月  査読有り
  • SAEKI T, ANRAKU K, ORITO S, ORMES J, KIMBELL B, MAKIDA Y, MATSUMOTO H, NISHIMURA J, YOSHIDA T
    Phys. Lett. B 422(1-4) 319-324 1998年3月  査読有り
  • YOSHIMURA K, ORITO S, UEDA I, ANRAKU K, GOLDEN R, MATSUMOTO H, MITCHELL J, NISHIMURA J, YOSHIDA T
    Phys. Rev. Lett. 75(21) 3792-3795 1995年11月  査読有り
  • 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.Cuffani, S.Dado, G.M.Dallavalle, P.Debu, M.M.Deninno, A.Dieckmann, M.Dittmar, M.S.Dixit, E.Duchovni, I.P.Duerdoth, D.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.E.Hughes-Jones, R.Humbert, 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.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.VanDalen, 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.Wells, N.Wermes, M.Weymann, G.W.Wilson, J.A.Wilson, I.Wingerter, V-H.Winterer, N.C.Wood, S.Wotton, B.Wunsch, T.RWyatt, R.Yaari, Y.Yang, G.Yekutieli, T.Yoshida, W.Zeuner, G.T.Zorn
    Phys. Lett. B 248(1-2) 211-219 1990年9月27日  査読有り
  • 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, I.Cohen, W.J.Collins, J.E.Conboy, M.Couch, M.Coupland, M.Cuffani, S.Dado, G.M.Dallavalle, M.M.Deninno, A.Dieckmann, M.Dittmar, M.S.Dixit, E.Duchovni, I.P.Duerdoth, D.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, 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, P.Grosse-Wiesmann, J.Grunhaus, H.Hagedorn, J.Hagemann, M.Hansroul, C.K.Hargrove, 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.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.von Krogh, J.Kroll, M.Kuwano, P.Kyberd, G.D.Lafferty, F.Lamarche, W.J.Larson, M.M.B.Lasota, J.G.Layter, P.Le Du, P.Leblanc, A.M.Lee, D.Lellouch, P.Lennert, L.Lessard, L.Levinson, S.L.Lloyd, F.K.Loebinger, J.M.Lorah, B.Lorazo, M.J.Losty, J.Ludwig, N.Lupu, 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, 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.O'Neill, F.G.Oakham, F.Odorici, M.Ogg, H.Oh, M.J.Oreglia, S.Orito, 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, H.von der Schmitt, S.Schreiber, J.Schwarz, A.Shapira, B.C.Shen, P.Sherwood, A.Simon, G.P.Siroli, A.Skuja, A.M.Smith, T.J.Smith, G.A.Snow, E.J.Spreadbury, 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.VanDalen, C.J.Virtue, 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, N.Wermes, M.Weymann, G.W.Wilson, J.A.Wilson, I.Wingerter, V-H.Winterer, N.C.Wood, S.Wotton, B.Wunsch, T.R.Wyatt, R.Yaari, Y.Yang, G.Yekutieli, T.Yoshida, W.Zeuner, G.T.Zorn
    Phys. Lett. B 242(2) 299-308 1990年6月  査読有り
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MISC

 110
  • 吉田 哲也
    日本物理学会講演概要集 55(1) 61-61 2000年3月10日  
  • 「パリティ」 15(12) 91-92 2000年  
  • 応用物理学会放射線分科会｢放射線｣ 25(4) 3-16 1999年  
  • 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 1997年6月  
  • 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年  
    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 1995年6月  
    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年  
    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.
    宇宙科学研究所報告. 特集 31 37-45 1993年3月  
    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 1993年2月  
    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.
  • 吉田 哲也, 安楽 和明, 井森 正敏, 折戸 周治, 島村 光太郎, 野崎 光昭, 原 敏光, 山川 裕司, 山本 明, 春山 富義, 東 保男, 槙田 康博, 三戸 利行, 山上 隆正
    宇宙科学研究所報告. 特集 23 127-136 1989年3月  
    気球搭載用超伝導ソレノイドマグネットとジェット型ドリフトチェンバーを用いた大型のスペクトロメータの製作を現在進めている。この測定器により反ヘリウムを<He>^^^-/He&acd;10^<-8>の微量まで探索し, かつ特に低エネルギーの反陽子のエネルギースペクトラムを測定することによって宇宙起源反陽子を探す。同時に本測定器ではガンマ線をコイルで電子陽電子対にコンバートさせることによりそのエネルギー及び方向を精度良く測定できる。また宇宙線中の陽電子についてもこれまで指摘されているような10GeV以上での流束過剰の存在についても調べることができると思われる。63年6月にプロトタイプの小型測定器を三陸より気球で打ち上げほぼ期待された性能を得ることができた。本年度中に大方の測定器を完成させ, 来年以降観測を始める予定で現在準備を進めている。

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