| Budget Amount *help |
¥19,630,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥4,530,000)
Fiscal Year 2017: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2016: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2015: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
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| Outline of Final Research Achievements |
Positive hydrogen ions with two component energies were irradiated on an aluminum plasma grid to produce negative ions in the extraction apertures. The energy of passing ions was adjusted by the subsequent control grid and electrons were deflected and removed by a magnetic field applied. It became clear that negative ions are produced by negative ionization of low energy positive ions and collapse in local space. By adjusting the positive-ion acceleration voltage and the control-grid voltage, the ionic plasma consisting of only positive and negative ions was able to be realized without collapse of negative ions. Although the electrostatic waves were able to be excited, negative ions collapsed. The cause of collapse seemed to be the application of electric and magnetic fields, but the physical mechanism of collapse has not been elucidated.
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