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Experimental study of charging of dust grains in the presence of energetic electrons

R Paul, G Sharma, K Deka, S Adhikari, R Moulick, S S Kausik, B K Saikia2022年Plasma Physics and Controlled FusionIF 2.2出版社

The role of hot electrons in the charging of dust grains is investigated in a two temperature hydrogen plasma. A variety of dust particles are introduced into the system and secondary electron emission (SEE) from each of the dust types has been reported. A cylindrical Langmuir probe is used for determining the plasma parameters and a Faraday cup is connected to an electrometer in order to measure the dust current. The electrometer readings confirm the electron emission from the dust and SEE is observed from the tungsten dust in a low-pressure experimental plasma device for the first time.

日本語訳

高温電子によるダスト粒子の帯電過程を、二温度水素プラズマ中で調査した。様々なダスト粒子を系に導入し、各ダスト種からの二次電子放出(SEE)を報告した。プラズマパラメータの測定には円筒型ラングミュアプローブを用い、ダスト電流の測定にはファラデーカップを電位計に接続して用いた。電位計の測定結果により、ダストからの電子放出が確認され、低圧実験プラズマ装置内のタングステンダストからの二次電子放出が初めて観測された。

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Dust grains
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