Design and construction of a microwave magnetization/demagnetization system for geomagnetic paleointensity determination

• Project/Area Number: 21740331
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Solid earth and planetary physics
• Research Institution: Kochi University
• Principal Investigator: YAMAMOTO Yuhji Kochi University, 教育研究部自然科学系, 助教 (00452699)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2009: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: 固体地球物理学 / 地球電磁気 / 磁性 / マイクロ波 / 国際情報交換 / イギリス

Research Abstract

A prototype microwave magnetization/demagnetization system have been designed and constructed for an application of the microwave LTD-DHT Shaw method. The system use 17.3-18.1 GHz microwaves. The most important component of the system is a resonant cavity and it is tested with and without a rock sample. Sharp microwave absorption is recognized for the test without the sample, whereas a dull absorption is observed for the test with the sample. Towards the practical use of the system, sample size should be reduced.

Research Products

• [Journal Article] Geomagnetic paleointensitydeduced for the last 300 kyr from Unzen Volcano,Japan, and the dipolar nature of the Iceland Basinexcursion, Earth Planet. (2010)
  • Author(s): Yamamoto Y., Shibuya H., Tanaka H.andHoshizumi H.
  • Journal Title: Sci.Lett. 293 Pages: 236-249
  • Peer Reviewed
• [Journal Article] Geomagnetic paleointensity deduced for the last 300 kyr from Unzen Volcano, Japan, and the dipolar nature of the Iceland Basin excursion (2010)
  • Author(s): Yamamoto Y.
  • Journal Title: Earth Planet.Sci.Left. Volume: 293 Pages: 236-249
  • Peer Reviewed
• [Journal Article] Geomagnetic paleointensity deduced for the last 300 kyr from Unzen Volcano, Japan, and the dipolar nature of the Iceland Basin excursion (2010)
  • Author(s): Yamamoto, Y.
  • Journal Title: Earth Planet. Sci. Lett. (印刷中)
  • Peer Reviewed
• [Presentation] アイスランドSudurdalur 地域から採取された古期溶岩への低温消磁2回マイクロ波加熱ショー法の予察的適用 (2010)
  • Author(s): 山本裕二
  • Organizer: 地球電磁気・地球惑星圏学会第128回講演会
  • Place of Presentation: 沖縄県市町村自治会館,沖縄県
  • Year and Date: 2010-11-02
• [Presentation] アイスランドSudurdalur地域から採取された古期溶岩への低温消磁2回マイクロ波加熱ショー法の予察的適用 (2010)
  • Author(s): 山本裕二
  • Organizer: 地球電磁気・地球惑星圏学会第128回講演会
  • Place of Presentation: 沖縄県市町村自治会館
  • Year and Date: 2010-11-02
• [Presentation] First absolute paleointensityrecord of the Iceland Basin geomagneticexcursion found in Unzen Volcano, Japan, and thedipolar nature of the excursion (2010)
  • Author(s): Yamamoto Y., Shibuya H., Tanaka H., Hoshizumi H.
  • Organizer: Western Pacific Geophysics Meeting
  • Place of Presentation: 台北国際会議中心,台湾
  • Year and Date: 2010-06-24
• [Presentation] First absolute paleointensity record of the Iceland Basin geomagnetic excursion found in Unzen Volcano, Japan, and the dipolar nature of the excursion (2010)
  • Author(s): Yamamoto Y.
  • Organizer: Western Pacific Geophysics Meeting
  • Place of Presentation: 台北国際会議中心(台湾)
  • Year and Date: 2010-06-24
• [Presentation] Iceland Basin 地磁気エクスカーションは双極子的か?-雲仙火山岩から得られた古地磁気強度測定結果からの検討 (2009)
  • Author(s): 山本裕二, 渋谷秀敏, 田中秀文, 星住英夫
  • Organizer: 地球電磁気・地球惑星圏学会第126回講演会
  • Place of Presentation: 金沢大学,石川県
  • Year and Date: 2009-09-28
• [Presentation] Iceland Basin地磁気エクスカーションは双極子的か?-雲仙火山岩から得られた古地磁気強度測定結果からの検討 (2009)
  • Author(s): 山本裕二
  • Organizer: 第126回 地球電磁気・地球惑星圏学会 講演会
  • Place of Presentation: 金沢大学(石川県)
  • Year and Date: 2009-09-28
• [Presentation] High temperature oxidation oftitanomagnetite grains and its possible influenceto Thellier paleointensity determinations (2009)
  • Author(s): Yamamoto Y.
  • Organizer: International Association of Geomagnetism andAeronomy
  • Place of Presentation: Sopron, Hungary
  • Year and Date: 2009-08-29
• [Presentation] Absolutepaleointensity from ca.5 Ma Jinchonri basalt inBaekryeongdo Island, the furthest north part ofsouth Korea (2009)
  • Author(s): Yamamoto Y., Lee Y.S., Kodama K.
  • Organizer: International Association ofGeomagnetism and Aeronomy
  • Place of Presentation: Sopron, Hungary
  • Year and Date: 2009-08-29
• [Presentation] High temperature oxidation of titanomagnetite grains and its possible influence to Thellier paleointensity determinations (2009)
  • Author(s): Yamamoto, Y.
  • Organizer: International Association of Geomagnetism and Aeronomy
  • Place of Presentation: Sopron, Hungary
  • Year and Date: 2009-08-29
• [Presentation] Absolute paleointensity from ca. 5 Ma Jinchonri basalt in Baekryeong do Island, the furthest north part of south Korea (2009)
  • Author(s): Yamamoto, Y.
  • Organizer: International Association of Geomagnetism and Aeronomy
  • Place of Presentation: Sopron, Hungary
  • Year and Date: 2009-08-29