| 铝单丝Z箍缩形成无核冕结构的物理分析 |
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| 引用本文： | 吴坚,李兴文,史宗谦,贾申利,邱爱慈.铝单丝Z箍缩形成无核冕结构的物理分析[J].强激光与粒子束,2014,26(2):025003-275. |
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| 作者姓名： | 吴坚 李兴文 史宗谦 贾申利 邱爱慈 |
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| 作者单位： | 1.电力设备与电气绝缘国家重点实验室, 西安 71 0049 |
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| 基金项目： | 国家自然科学基金项目(51237006) |
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| 摘 要： | 针对铝单丝Z箍缩负载,计算其可形成金属蒸气而不形成核冕等离子体的电路和负载参数范围。提出了铝丝电爆炸形成金属蒸气的能量沉积判据和击穿电压判据;建立了热动力学模型,选取电路参数使得金属丝气化时放电回路电流恰好迅速下降,从而避免发生电压击穿。计算了典型电路下的负载电流、电压、电阻及沉积能量的变化曲线,并分析了回路总电感、充电电压以及负载丝长度、直径对其的影响规律。计算结果表明:当储能电容为150pF、充电电压为65kV、回路电感为300nH时,可驱动直径20μm、长2cm的铝丝电爆炸形成铝丝蒸气。快电流前沿、小丝直径和较短的丝长度有助于提高负载中的单位质量沉积能量,容易电爆炸形成金属蒸气负载。
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| 关 键 词： | Z箍缩等离子体 铝丝电爆炸 核冕结构 金属蒸气 电压击穿 |
| 收稿时间： | 2013-07-21; |
Suppression of core-corona structure in single-wire aluminum Z-pinches |
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| Wu Jian,Li Xingwen,Shi Zongqian,Jia Shenli,Qiu Aici.Suppression of core-corona structure in single-wire aluminum Z-pinches[J].High Power Laser and Particle Beams,2014,26(2):025003-275. |
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| Authors: | Wu Jian Li Xingwen Shi Zongqian Jia Shenli Qiu Aici |
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| Affiliation: | 1.State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an 710049,China |
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| Abstract: | The circuit and load parameter ranges, in which gaseous aluminum other than core-corona structures could be obtained from the single aluminum wire Z pinch, were analyzed by thermodynamical model. Firstly, the energy deposition criterion and the voltage breakdown criterion were proposed. Secondly, thermodynamical models were established. The circuit parameters were determined by ensuring a rapid decrease of the load current when the wire turns to gas in order to avoid electrical voltage breakdown. Finally, the load current voltage, resistance, and the deposited energy were calculated, and their dependences on the circuit inductance, charging voltage, and wire diameter were analyzed. The calculation results indicated that with a storage capacitance of 150 nF, a charging voltage of 65 kV, and a loop inductance of 300 nH, an aluminum wire of a length of 2 cm and a diameter of 20 μm could be heated to gas state. A faster rising current, a smaller wire diameter or little length would enhance the energy deposition in the wire, and are easier to produce gaseous aluminums. |
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| Keywords: | aluminum exploding wire core-corona structure metal vapor voltage breakdown |
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