弹簧支撑自适应Z-pinch单层柱面丝阵负载研制

Method to fabricate self-adaptable cylindric wire-array load for Z-pinch physical experiments

在靶室阴、阳电极呈水平放置的电磁内爆加速器中,抽真空时电极间距会收缩变短,电极间的丝阵负载无法维持预定的分布状态,为此,设计出了一套单层柱面状丝阵负载制备技术,通过弹簧预先压缩足够长度使负载能自动适应电极间距变化,并利用一套可以拆卸的辅助装置固定负载各部件。对制备出的多种单层柱面丝阵负载的测试及靶场实验结果表明,负载能自动适应电极间距变化,最大收缩量达3mm,负载丝仍保持预定的分布并且绷紧,制备技术也便于负载的装配、运输和安装。

In Z-pinch physical experiments carried out on accelerators with horizontal cathode and anode, the distance between the electrodes will shorten by a scale of 2-3 mm while the chamber is pumped to vacuum. Due to this change, wires of the cylindric array loaded between the electrodes will loosen to a degree beyond the physical experiments. To solve this problem and to make sure that the wire-array can be fabricated, stored, transported and loaded to the electrodes, we make use of the spring's flexibilities and fabricate single-walled cylindric wire-array. Due to the pressed spring, the wire-array will fit the distance changes of the electrodes. And the loads can keep the designed initial states required by physical experiments. By these methods, we designed and fabricated a series of cylindric wire-array loads with ultra-fine tungsten wires in diameters of 5-l0 μm for several experiments on facilities of Qiangguang-I and Yang. The results show that the loads can fit the distance change between the electrodes and keep the wires straight.