| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
The group of the researcher proposed a plasma thruster with a single helical antenna in which thrust and specific impulse could be controlled independently. As it consists of a single antenna, efficiency is not necessarily high. The researcher inspired an idea of a variable-pitch helical antenna which had a function of variable axial length to improve the efficiency. The purpose of the project is to examine the effectiveness of the antenna.
A prototype antenna was manufactured to be applied to an experimental simulator. The dependence of produced plasma density on rf power or external magnetic field varied according to antenna length, suggesting an effect of variable antenna length. An excitation of waves, however, was not found by rf magnetic field measurement. The physical mechanism of the effect should be examined in the future.
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