An instability phenomenon of the current sheath implosion, namely the unstable mode, has been observed in the DPF 40 plasma focus device.

在DPF - 40等离子体焦点装置中，首次观测到径向运动电流壳层的一种不稳定现象，即不稳定模式。

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On the basis of the plasma conditions in LEO. We adopt plasma thin sheath model and calculate ion collection current.

本文根据LEO中等离子体温度低、密度高、德拜长度小的特点，采用薄鞘层近似，计算了离子收集电流；

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Transformer insulation sheath for general fixed on the elevatedseat flange, elevated seat inside about can put down the maintenance andmeasurement using the built-in type current transformer.

变压器绝缘护套一般固定在升高座的法兰上，升高座的里边大约可以放下维护和测量用的内装式电流互感器。

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