| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Outline of Final Research Achievements |
In order to develop the thermionic energy converter operated lower than 870 K, the emission performance of plasma treated semiconductor emitter was studied. In addition, to make clear the problem of thermionic emission from semiconductor surface, the atomic structure on plasma treated surfaces was also investigated with the characteristics of thermionic emission.
As the results of the emission measurement using silicon and diamond emitter, the emission current of plasma treated surface was increased, the current density of mA/cm2 was obtained in the range from 670-820 K. The stability of Cs on heated surface was improved by plasma surface oxidation. The emission current from plasma treated surface was higher than the surface without plasma treatment.
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