Research on millimeter-wave discharge phenomena for wireless power transfer at a high energy density

2014 Fiscal Year Final Research Report

• Project/Area Number: 23246145
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Aerospace engineering
• Research Institution: The University of Tokyo
• Principal Investigator: KOMURASAKI KIMIYA 東京大学, 新領域創成科学研究科, 教授 (90242825)
• Co-Investigator(Renkei-kenkyūsha): SAKAMOTO Keishi 独立行政法人日本原子力研究開発機構, 研究員 (90343904) ; ODA Yasuhisa 独立行政法人日本原子力研究開発機構, 研究員 (60512209)
• Project Period (FY): 2011-04-01 – 2015-03-31
• Keywords: エネルギー / ミリ波 / ワイヤレス給電 / プラズマ / 放電

Outline of Final Research Achievements

A compact power reception and conversion system was studied for wireless power transfer using a high power-density millimeter-wave beam. An incident beam was expanded and then concentrated using a tapered-tube concentrator and beam acquisition efficiency of higher than 90% was achieved. Next, a discharge experiment was conducted by coupling above system with a high power gyrotron.　As a result, detonation was successfully driven in the detonation tube. In addition, we proposed a new model in which the critical field for ionization is determined by accumulated electron heating. In simulation, we found nested fine filaments expanding in the electric field direction inside of a primary filament propagating parallel to the incident beam.

Free Research Field

航空宇宙工学