Simultaneous observation of neutral wind and plasma drift in the cusp region

• Project/Area Number: 26400479
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Space and upper atmospheric physics
• Research Institution: Tomakomai National College of Technology (2016); Kochi University of Technology (2014-2015)
• Principal Investigator: Kakinami Yoshihiro 苫小牧工業高等専門学校, その他部局等, 准教授 (00437758)
• Co-Investigator(Renkei-kenkyūsha): WATANABE Shigeto 北海道情報大学, 経営情報学部, 教授 (90271577) ; YAMAMOTO Masa-yuki 高知工科大学, システム工学群, 教授 (30368857)
• Research Collaborator: Larsen Miguel クレムソン大学, 教授
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2014: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
• Keywords: 熱圏風 / 熱圏大気 / 電離圏プラズマ / カスプ / プラズマドリフト / サウンディングロケット / 化学物質放出 / 海外学術調査 / バリウム / chemical release

Outline of Final Research Achievements

An experiment of barium (Ba) and strontium (Sr) release from rocket was executed to investigate neutral density enhancement in the cusp region. Ba is ionized by extreme ultraviolet light. The resonance scattering light from Ba, Ba+ and Sr work as tracers of background neutral wind and plasma drift. From the observation, direction of neutral wind and plasma drift was different. Furthermore, strong neutral wind shear was found. The mechanism of the neutral density enhancement was not addressed because the chemicals was released out of the center of the cusp. However, the scheme of simultaneous observation of neutral wind and plasma drift was established.

Research Products

• [Int'l Joint Research] Clemson University/University of Alaska Fairbanks(米国)
• [Int'l Joint Research] Clemson University/University of Alaska(米国)
• [Presentation] Spectral analyses of resonance scattering of Sr and Ba for determination of thermospheric neutral wind (2017)
  • Author(s): Kou Saito, Yoshihiro Kakinami, and Masa-yuki Yamamoto
  • Organizer: Japan Geoscience Union Meeting 2016
  • Place of Presentation: 千葉県
  • Year and Date: 2017-05-22
• [Presentation] Winds and Ion Drifts Measured in the Thermospheric Footprint of Earth's Northern Magnetic Cusp During the C-REX Sounding Rocket Mission (2015)
  • Author(s): Mark Conde, Miguel Larsen, Donald Hampton, Manbharat Dhady, Michael Ahrns, Anasuya Aruliah, Yoshihiro Kakinami, Barrett Barker, Andrew Kiene, Fred Sigernes, and Dag Lorentzen
  • Organizer: American Geophysical Union, Fall meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2015-12-14
  • Int'l Joint Research
• [Presentation] Measurements of thermospheric wind and plasma drift by using Barium and Strontium release in the cusp region (2015)
  • Author(s): Yoshihiro Kakinami, Shigeto Watanabe, Masa-yuki Yamamoto, Daiki Kihara, Mark Conde, and Miguel Larsen
  • Organizer: Society of Geomagnetism and Earth, Planetary and Space Sciences Fall Meeting
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2015-10-31
• [Presentation] Measurements of neutral wind and plasma drift with chemical release in the cusp region - preliminary results (2015)
  • Author(s): Yoshihiro Kakinami, Daiki Kihara, Shigeto Watanabe, Masa-yuki Yamamoto, Mark Conde and Miguel Larsen
  • Organizer: apan Geoscience Union Meeting
  • Place of Presentation: Chiba, Japan
  • Year and Date: 2015-05-24
• [Presentation] The C-REX Sounding Rocket Mission (2015)
  • Author(s): Mark Conde, Miguel Larsen, Donald Hampton, Manbharat Dhadly, Jason Ahrns, Anasuya Aruliah, Yoshihiro Kakinami, Barrett Barker, Andrew Kiene, Fred Sigernes, and Dag Lorentzen
  • Organizer: European Geosciences Union General Assembly
  • Place of Presentation: Vienna, Austria
  • Year and Date: 2015-04-12
  • Int'l Joint Research
• [Presentation] Recent experiments of Lithium release and future experiment of Barium release from the sounding rocket in the cusp region (2014)
  • Author(s): Yoshihiro Kakinami, Masa-yuki Yamamoto, Shigeto Watanabe, Daiki Kihara, Miguel Larsen, and Mark Conde
  • Organizer: 第136回地球電磁気・地球惑星圏学会
  • Place of Presentation: キッセイ文化ホール（長野）
  • Year and Date: 2014-10-31 – 2014-11-03
• [Remarks] 宇宙花火
  • URL: http://www.ep.sci.hokudai.ac.jp/~kakinami/profile/research/spaceFireWork.html
• [Remarks] 高知工科大学大学院 電子・光システム工学コース ニュース
  • URL: http://www.ele.kochi-tech.ac.jp/news/2014.html#1210