| Budget Amount *help |
¥21,970,000 (Direct Cost: ¥16,900,000、Indirect Cost: ¥5,070,000)
Fiscal Year 2013: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2012: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
Fiscal Year 2011: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
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| Outline of Final Research Achievements |
Hall thrusters are a class of electric propulsion device in which a propellant gas is ionized and accelerated to produce thrust. They offer an attractive combination of high thrust efficiency (exceeding 50%) and specific impulse (~1,000-3,000 s). A key requirement for the practical use of Hall thrusters is the ability to operate for long durations (more than 10,000 hrs). For optimization of lifetime, What is needed, is a method of quantitatively measuring thruster erosion rates non-intrusively in real- or near real-time, for example by in situ measurement of the eroded wall material The primary life-limiter for Hall thrusters is acceleration channel wall erosion. Therefore, we have developed a CRDS erosion sensor and have made a study on the dependence of erosion rate on magnetic field configuration.
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