Study on the cascade process of the mesoscale plasma structure in the polar ionosphere

2014 Fiscal Year Final Research Report

• Project/Area Number: 22340143
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Space and upper atmospheric physics
• Research Institution: Kyoto University (2014); The University of Electro-Communications (2010-2013)
• Principal Investigator: TAGUCHI Satoshi 京都大学, 理学(系)研究科(研究院), 教授 (80251718)
• Co-Investigator(Kenkyū-buntansha): HOSOKAWA Keisuke 電気通信大学, 大学院情報理工学研究科, 准教授 (80361830) ; OGAWA Yasunobu 国立極地研究所, 教育研究系, 准教授 (00362210)
• Co-Investigator(Renkei-kenkyūsha): TAGUCHI Makoto 立教大学, 理学部, 教授 (70236404) ; SHIOKAWA Kazuo 名古屋大学, 太陽地球環境研究所, 教授 (80226092)
• Research Collaborator: AOKI Takeshi ; SUZUKI Shin ; TAWARA Atsushi
• Project Period (FY): 2010-04-01 – 2015-03-31
• Keywords: 電離圏 / 極域 / プラズマ / 大気光 / オーロラ / カスプ / 極冠 / 電子密度

Outline of Final Research Achievements

The plasma in the polar ionosphere often forms a mesoscale structure through various processes. In this study we made an all-sky imager having an ability to observe the mesoscale plasma structure and the relevant auroral structure at high time resolution, and analyzed data that were obtained from the imager. We identified the occurrence characteristics of the high-density region in the polar cap, and the nature of its structuring. We also found unprecedented spatial and temporal characteristics of the particle precipitation in the cusp.

Free Research Field

太陽地球系物理学