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Magnetic probe measurements of the initial phase in a plasma focus device

H Bruzzone, D Grondona1997年Plasma Physics and Controlled FusionIF 2.2出版社

Measurements with magnetic probes performed in the initial phase of a plasma focus device (30 kV, ) in the pressure range 0.5 - 5 mbar deuterium are presented, and an interpretation of the obtained signals is given, which includes a procedure for disentangling the effect of variations in the discharge current from the signals. Thick current sheaths, essentially filling all the space between the electrodes, are shown to form at all pressures, travelling radially outwards at constant speeds of between 2.5 and 3.4 . Experimental confirmation of a theoretical prediction of distortions in the registered signals due to current exclusions by the probe's body is given, and evidence confirming the `inverse skin' effect is presented.

日本語訳

プラズマフォーカス装置(30 kV、)の初期段階において磁気プローブを用いて行った測定結果を、0.5~5 mbarの重水素圧力範囲で示す。得られた信号の解釈についても述べる。そこには、信号から放電電流の変動の影響を分離する手法が含まれる。すべての圧力において、電極間の空間をほぼ満たす厚い電流シースが形成され、2.5~3.4の一定速度で半径方向外側へ伝播することが示される。また、プローブ本体による電流排除に起因する信号の歪みに関する理論的予測の実験的確認が示され、「逆スキン効果」の存在を裏付ける証拠が提示される。

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