Investigation of cubic boron nitride field emission cathode

2015 Fiscal Year Final Research Report

• Project/Area Number: 26630444
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Aerospace engineering
• Research Institution: Kyushu University
• Principal Investigator: Yamamoto Naoji 九州大学, 総合理工学研究科(研究院), 教授 (40380711)
• Co-Investigator(Kenkyū-buntansha): OHKAWA YASUSHI 宇宙航空研究開発機構, 研究開発本部・研究院 (20415920)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 推進・エンジン / 電子源 / 電界放出型カソード / 立方晶窒化ホウ素

Outline of Final Research Achievements

As an electron source of an Electro dynamic tether system and ion engine system, a field emission cathode with cubic boron nitride (cBN) thin layer have been developed. The maximum extracted current is 107 micro A; the current density is 0.55 mA/cm^2.
The influence of atomic oxygen on extracted performance was investigated at atomic oxygen injection test was conducted Atomic oxygen durability test facility in Kyushu institute of technology. The result showed that Field emission cathode with cBN has atomic oxygen tolerance.

Free Research Field

航空宇宙工学