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Magnetic field dependence of the plasma properties in a negative hydrogen ion source for fusion

L Schiesko, P McNeely, P Franzen, U Fantz, the NNBI Team2012年Plasma Physics and Controlled FusionIF 2.2出版社

Axially resolved measurements of plasma parameters were performed by two Langmuir probes moving in parallel from the exit of the driver (where the plasma is generated) up to the extraction region neighbourhood of the IPP RF negative hydrogen ion source prototype. At the driver exit, the plasma parameters show an unexpected inhomogeneity in the presence of the magnetic field: a cold and dense plasma flows out of the top part of the driver while a hot and low density plasma flows from the bottom part. A local relation between the top and bottom parameters is derived from the conservation of the energy flux.

日本語訳

軸方向に分解されたプラズマパラメータの測定は、ドライバー(プラズマが生成される場所)の出口からIPP RF負水素イオン源原型機の引き出し領域付近まで平行に移動する2本のラングミュアプローブによって行われた。ドライバー出口では、プラズマパラメータは磁場の存在下で予期しない不均一性を示す:冷たく高密度のプラズマがドライバー上部から流出する一方、高温で低密度のプラズマが下部から流出する。上部と下部のパラメータ間の局所的な関係は、エネルギー束の保存から導出される。

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Ion sourceNegative hydrogen
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