近藤 光志

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アバター
研究者氏名
近藤 光志
 
コンドウ コウジ
URL
http://sp.cosmos.ehime-u.ac.jp/~kondo/
所属
愛媛大学
部署
宇宙進化研究センター
学位
修士(理学)(愛媛大学), 博士(工学)(愛媛大学)

研究分野

 
 

委員歴

 
2015年4月
 - 
2017年3月
地球電磁気・地球惑星圏学会  学生発表賞(オーロラメダル)審査員
 

論文

 
Numerical MHD study for Plasmoid Instability in Uniform Resistivity
Shimizu, T., Kondoh, K., and Zenitani, S.,
Phys. Plasmas      2017年   [査読有り]
Shimizu Tohru, Torii Hiroyuki, Kondoh Koji
EARTH PLANETS AND SPACE   68    2016年5月   [査読有り]
Nitta, S., Wada, T., Fuchida, T., and Kondoh, K.
The Astrophysical Journal   828    2016年9月   [査読有り]
© 2016. The American Astronomical Society. All rights reserved. We have clarified the structure of asymmetric magnetic reconnection in detail as the result of the spontaneous evolutionary process. The asymmetry is imposed as ratio k of the magneti...
Kondoh Koji, Shimizu Tohru
EARTH PLANETS AND SPACE   66    2014年10月   [査読有り]
T. Shimizu, K. Kondoh
Physics of Plasmas   20    2013年12月   [査読有り]
The 3D instability of the spontaneous fast magnetic reconnection process is studied with magnetohydrodynamics (MHD) simulations, where the 2D model of the spontaneous fast magnetic reconnection is destabilized in three dimension. As well known in ...
Kondoh Koji, Ugai Masayuki, Shimizu Tohru
ADVANCES IN SPACE RESEARCH   48(2) 287-291   2011年7月   [査読有り]
T. Shimizu, K. Kondoh, M. Ugai
Earth, Planets and Space   61 569-572   2009年1月
Three-dimensional instability of spontaneous fast magnetic reconnection is studied using MHD (magneto- hydro-dynamic) simulation. Previous two-dimensional MHD studies have demonstrated that, if a current-driven anomalous resistivity is assumed, tw...
Ugai, M., Kondoh, K. & Shimizu, T.
Earth Planets and Space   61 561-564   2009年1月   [査読有り]
The 3D spontaneous fast reconnection model is applied to well-known signatures of geomagnetic substorms and solar flares. First, it is applied to the traveling compression regions (TCRs) associated with plasmoids propagating down the tail plasma s...
Kondoh, K. & Ugai, M.
Ann. Geophys.   27 2297-2302   2009年12月   [査読有り]
Three-dimensional configuration of earthward fast flow in the near-Earth plasma sheet is studied using threedimensional magnetohydrodynamics (MHD) simulations on the basis of the spontaneous fast reconnection model. In this study, the sheared magn...
Shimizu, T., Kondoh, K., Shibata, K., & Ugai, M.
Phys. Plasmas   16    2009年6月   [査読有り]
Three-dimensional instability of the spontaneous fast magnetic reconnection is studied with magnetohydrodynamic (MHD) simulation, where the two-dimensional model of the spontaneous fast magnetic reconnection is destabilized in three dimension. Gen...
MAGNETOHYDRODYNAMICS STUDY OF THREE-DIMENSIONAL FAST MAGNETIC RECONNECTION FOR INTERMITTENT SNAKE-LIKE DOWNFLOWS IN SOLAR FLARES
Shimizu, T., Kondoh, K., Ugai, M. & Shibata, K.
The Astrophysical Journal      2009年   [査読有り]
Three dimensional configuration of earthward fast plasma flow in the near-Earth plasma sheet
Kondoh Koji, Ugai Masayuki, Shimizu Tohru
EARTH PLANETS AND SPACE   61(5) 611-614   2009年   [査読有り]
Kondoh, K. & Ugai, M.
J. Geophys. Res.   113    2008年3月   [査読有り]
The spontaneous fast reconnection model is applied to the earthward fast flow events observed in the near-Earth plasma sheet. Here, the earthward fast flow events include both of bursty bulk flow events and flow burst events. In order to apply it ...
Kondoh, K. & Ugai, M.
Adv. Space Res.   39 1378-1381   2007年6月   [査読有り]
Three dimensional structure of the fast convection flow in the plasma sheet is examined using magnetohydrodynamic (MHD) simulations on the basis of spontaneous fast reconnection model. The fast flow observed in the near-Earth magnetotail is one of...
Shimizu, T., Ugai, M., & Kondoh, K.
Adv. Space Res.   37 1283-1286   2006年5月   [査読有り]
MHD study for the adiabatic expansion acceleration process associated with the spontaneous fast magnetic reconnection is reported. When the fast reconnection process steadily generates a plasmoid in the downstream, the adiabatic expansion accelera...
Kondoh, K., Ugai, M., & Shimizu, T.
Adv. Space Res.   37 1301-1304   2006年5月   [査読有り]
The dynamics of large-scale magnetic loop in three dimensions is studied by MHD simulations. The spontaneous fast reconnection model is used in this study. Once a current-driven anomalous resistivity is ignited in a local region in a current sheet...
Ugai, M. & Kondoh, K.,
Phys. Plasmas   13    2006年11月   [査読有り]
On the basis of the spontaneous fast reconnection model, the underlying physical mechanism of magnetospheric current wedge evolution is studied by magnetohydrodynamic simulations. It is demonstrated that when a three-dimensional magnetic loop top ...
K. Kondoh, M. Ugai, T. Shimizu
European Space Agency, (Special Publication) ESA SP   101-105   2005年12月
Three dimensional dynamics of a magnetic loop is studied by magnetohydrodynamic simulations on the basis of the spontaneous fast reconnection model. In this model, petschek type fast reconnection is represented, so that a pair of slow shocks elong...
M. Ugai, K. Kondoh, and T. Shimizu
Physics of Plasmas   12 1-7   2005年4月   [査読有り]
The spontaneous fast reconnection model is studied in a three-dimensional (3D) situation for different plasma parameter values. In any case, once a current-driven anomalous resistivity is ignited, magnetic reconnection explosively evolves as a non...
K. Kondoh, M. Ugai, T. Shimizu
Advances in Space Research   33 794-798   2004年4月   [査読有り]
The spontaneous fast reconnection evolution is studied in asymmetric magnetic field configuration. In particular, it is investigated how shear flow influences in magnetosheath region to the propagation of plasmoid results from magnetic reconnectio...
M. Ugai, K. Kondoh, and T. Shimizu
Physics of Plasmas   11 1416-1423   2004年4月   [査読有り]
The basic physics of the spontaneous fast reconnection model was studied in a three-dimensional (3D) situation for different resistivity parameter values. The 3D fast reconnection mechanism explosively evolved as a nonlinear instability, once the ...
K. Kondoh and M. Ugai
Adv. Space Res.   33 799-804   2004年4月   [査読有り]
The dawn-dusk magnetic field component (B z ) in the plasmoid resulting of magnetic reconnections have been observed GEOTAIL satellite. We have studied the effects by B z component in the reconnection in geomagnetotail. This paper present the res...
M. Ugai, K. Kondoh, and T. Shimizu
Physics of Plasmas   10(Vol. 10) No. 2, pp. 357-363-363   2003年2月   [査読有り]
Three-dimensional dynamics of a large-scale magnetic loop was studied by precise magnetohydrodynamic simulations. A fast reconnection mechanism evolved by the positive feedback between the global reconnection flow and the anomalous resistivity. Wh...
K. Kondoh, M. Ugai
Adv. Space Res.   29 1119-1124   2002年4月   [査読有り]
Flux transfer events (FTEs) observed at the dayside magnetopause is studied on the basis of the spontaneous fast reconnection model. If an X neutral point is not located at the sub-solar point, the flux transfer event may be significantly influenc...
M. Ugai, K. Kondoh
Physics of Plasmas   8(5,Pt.1) 1545-1552   2001年5月   [査読有り]
The spontaneous fast reconnection evolution is studied in a long current sheet system in various physical situations, where the threshold of current-driven anomalous resistivity is assumed to increase with the thermal velocity. If the initial thre...
Kobayashi, M. N., T. Doke, J. Kikuchi, T. Hayashi, K. Itsumi, T. Takashima, N. Takehana, H. Shirai, J. Yashiro, N. Hasebe, K. Kondoh, T. Yanagimachi, M. Nagatani, A. Harada, and B. Wilken
Adv. Space Res.   26 861-864   2000年9月   [査読有り]
We have investigated the relationship between solar wind speeds and the energetic proton intensity associated with corotating interaction regions (CIR) observed at 1 AU during 1973 - 1995 using NSSDC Data. The speed-difference between the high-spe...
T. Doke, N. Hasebe, N. Hasebe, T. Hayashi, K. Itsumi, J. Kikuchi, M. N. Kobayashi, K. Kondoh, H. Shirai, T. Takashima, T. Takehana, Y. Yamada, T. Yanagimachi, J. Yashiro
Advances in Space Research   23 487-490   1999年12月   [査読有り]
The energy spectra (40 to 300 MeV/n) of galactic cosmic ray particles (C, N, O, Ne, Mg, Si, and Fe) observed by the HEP-HI silicon detector telescope onboard the GEOTAIL satellite were investigated over the period from January 1993 to May 1996, fr...
K.Kondoh, N.Hasebe, T.Doke, J.Kikuchi, T.Takashima, M.N.Kobayashi, T.Yanagimachi, J.Medina, J.Sequeiros
Adv. Space Res.   23 3-594   1999年12月   [査読有り]
Long-term decrease events in the intensity of galactic cosmic rays have been investigated using solar wind parameters. We investigated distinct long-term decreases in 1993/94 near the solar minimum phase. In this period, the corotating interaction...
Kobayashi Masanori, Doke Tadayoshi, Kikuchi Jun, Hayashi Takayoshi, Takashima Takeshi, Takehana Naohiro, Shirai Hidekazu, Hasebe Nobuyuki, Kondoh Koji, Wilken Berend
Journal of the Physical Society of Japan   67(11) 3991-3996   1998年11月
A series of corotating energetic helium events with 3–5 MeV/n has been observed by the HEP telescopesonboard the GEOTAIL satellite at 1 AU from October 1993 to August 1994. We have examined the relationship between solar wind (SW) speeds observed...
HASEBE N, DOKE T, YANAGIMACHI T, NAGATA K, KOHNO T, MUNAKATA K, YANAGITA S, KASHIWAGI T, WILKEN B
Adv. Space Res.   19(5) 813-816   1997年12月   [査読有り]
The composition and energy spectra of anomalous cosmic-rays (ACRs) in the energies 6 - 200 MeV/n have been measured during the period from September 1992 to August 1995 using the High Energy Particle instrument onboard the GEOTAIL satellite orbiti...
The first observation of sulfur in anomalous component by the GEOTAIL and the WIND(jointly worked)T. Takashima, N. Hasebe, T. Doke, J. Kikuchi, T. Hayashi, M. Kobayashi, N. Takehana, H. Shirai, C. Kato, S. Yanagita, Y. Yamada,M. Ehara, T. Yanagimachi, ・・・
Astrophys. J.   (477) 111-113   1997年   [査読有り]
The first observation of sulfur in anomalous component by the GEOTAIL and the WIND(jointly worked)T. Takashima, N. Hasebe, T. Doke, J. Kikuchi, T. Hayashi, M. Kobayashi, N. Takehana, H. Shirai, C. Kato, S. Yanagita, Y. Yamada,M. Ehara, T. Yanagima...
Gloval Distribution of Trapped He Fluxes From OHZORA Satellite During the Geomagnetically Quiet Period of 1984-1987
Radiation Belt: Models and Standards, Geophysical Monograph 97, American Geographycal Union   255-258   1996年   [査読有り]
HASEBE N, KONDOH K, DOKE T, YANAGIMACHI T, NAGATA K, KASHIWAGI T, MUNAKATA K, KOHNO T, WILKEN B
J. Geomag. Geoelectr   47(12) 1333-1338   1995年

Misc

 
Kondoh Koji, Ugai Masayuki
Annual Journal of Engineering, Ehime University   2(Vol. II) 111-118   2003年3月
KONDOH Koji, UGAI Masayuki
工学ジャーナル   6 181-185   2007年3月
The dynamics of large-scale magnetic loop in three dimensions is studied by magnetohydrodynamics simulations. The spontaneous fast reconnection model is used in this study. Once a current-driven anomalous resistivity is ignited in a local region i...
長谷部信行, 新谷敏夫, 村田健史, 近藤光志, 道家忠義, 菊池順, 高島健, 逸見憲史, 柏木利介
愛媛大学工学部紀要   17 473-482   1998年2月
長谷部信行, 近藤光志
科学衛星・宇宙観測シンポジウム   5th 26-29   1996年11月
長谷部信行, 近藤光志, 三谷慎吾, 谷端良次, 久保孝平, 福岡裕一, 柴村英道, 京谷誠, 乃美和博
愛媛大学工学部紀要   16 577-586   1997年2月
月探査用γ線分光計の最適化(共著)長谷部信行、三谷慎吾、久保耕平、浅原武史、エズズイミン、谷端良次、村田健、柴村英道、柏木利介、京谷誠、楢崎勝弘、乃美和博
愛媛大学工学部紀要   (17) 483-497   1998年
近藤光志, 長谷部信行, 道家忠義, 菊池順, 柳町朋樹, 長谷方道, 藤井善次郎, WILKEN B, MCDONALD F B
愛媛大学工学部紀要   17 463-471   1998年2月
長谷部 信行, 近藤 光志, 小林 正規 [他]
愛媛大学教養部紀要   28(2) 59-69   1995年12月
Global Distributions of Trapped Particle Fluxes Observed by OHZORA Satellite during 1984-1987.
28 71-82   1995年

書籍等出版物

 
近藤 光志, 阿萬 裕久, 木下 浩二 (担当:共著)
森北出版   2007年3月   ISBN:4627846118

講演・口頭発表等

 
新田伸也, 丸山翔矢, 近藤光志
日本天文学会年会講演予稿集   2017年8月20日   
非対称磁気リコネクションの磁気流体計算
近藤光志
地球電磁気・地球惑星圏学会2017年秋学会   2017年10月   
新田伸也, 近藤光志, 丸山翔矢
日本天文学会年会講演予稿集   2016年8月20日   
新田伸也, 和田智秀, 淵田泰介, 近藤光志
日本天文学会年会講演予稿集   2016年2月20日   
Simulation study of the asymmetric magnetic reconnection in the shear flow
近藤光志
地球電磁気・地球惑星圏学会2016年秋学会   2016年11月   

担当経験のある科目

 
 

競争的資金等の研究課題

 
地球前面での磁気再結合現象における太陽風の影響
太陽共回転相互作用領域における粒子加速
離散データの三次元可視化

社会貢献活動

 
宇宙の色と温度
【講師】  2017年7月28日 - 2017年7月28日
宇宙環境入門
【講師】  2016年10月22日 - 2016年10月23日
日本天文学会2016年秋季大会LOC
【その他】  2016年9月14日 - 2016年9月16日
太陽系宇宙への招待
【講師】  2014年7月6日 - 2014年7月6日