A Proposed Test of Extended MHD Plasmas by Merging of Lithium Ion Plasmas with Pure Electron Plasmas

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  • 正負２つの非中性プラズマのマージングによる拡張ＭＨＤの検証実験法の開発計画
  • セイフフタツ ノ ヒチュウセイ プラズマ ノ マージング ニ ヨル カクチョウ MHD ノ ケンショウ ジッケンホウ ノ カイハツ ケイカク

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Abstract

Recently, extended MHD plasmas have been proposed, especially in both theoretical and computational fields of plasma physics. To test those experimentally, we propose a new project using two nonneutral plasmas: pure ion and electron plasmas. The experiment is performed on a linear machine in which a pair of positive and negative electrostatic potential wells is externally produced. In the positive potential well, an 7Li+ plasma is confined, while an electron plasma in the negative potential one. Then, those nonneutral plasmas are merged into an extended MHD plasma. The most remarkable advantage to employing nonneutral plasmas is that the ion skin depth, that is a typical scale length of the extended MHD plasmas, can be extended to the plasma radius. This actually alleviates experimental difficulties in diagnosing properties of the extended MHD plasmas. With precisely controlling densities of both pure 7Li+ ion and electron plasmas, the proposed method may explore an unrevealed research field of extended MHD plasmas.

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