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在快前沿放电装置（约2 kA，12 ns）上对四种绞合波长（λt=0.37，0.5，0.75，1.0 mm）的双绞铝丝开展了纳秒电爆炸实验研究. 实验结果表明，特定绞合波长会对能量沉积、膨胀过程、光辐射产生显著影响，当绞合波长为0.5 mm时，能量沉积为原子化焓的3.2倍，而其他三种绞合波长能量沉积变化不大，约为原子化焓的1.8倍；绞合波长为0.5 mm 时膨胀速度达3.8× 103 m/s，光辐射相对强度也最高，在膨胀过程中较好地保持了初始结构，在t=246 ns时，形成了密度约为1019 cm-3，直径约为1.6 mm的中性原子柱，并且在表面形成了波长约为0.5 mm，幅值约为0.3 mm的周期性结构.The experiments on nanosecond electrical explosion of twisted aluminum wires with different wavelengths (λt=0.37, 0.5, 0.75, 1.0 mm) are carried out. The experimental results indicate that a specific wavelength can strongly affect the energy deposition, expansion velocity, and radiation intensity. The energy deposition is about 3.3 times the atomic enthalpy of aluminum when the twisted wavelength is 0.5 mm. While for the other three twisted wavelengths, the energy depositions are all about 1.8 times the atomic enthalpy. The expansion velocity is about 3.8×103 m·s-1 for the wavelength 0.5 mm, and the optical radiation intensity is also strongest for this wavelength. The initial twisted structure is strongly imprinted in the freely expanding aluminum column after the electrical explosion. In the experiments for the wavelength 0.5 mm, a neural particle column with a diameter of 1.6 mm is formed and its density is about 1019 cm-3 at t=246 ns. A periodic structure with the wavelength 0.5 mm and the amplitude 0.3 mm is observed on the surface of this column.
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Keywords:
- twisted aluminum wires /
- electrical explosion /
- energy deposition /
- Z pinch
[1] Ding N, Zhang Y, Ning C, Shu X J, Xiao D L 2008 Acta Phys. Sin. 57 3027 (in Chinese) [丁宁, 张扬, 宁成, 束小建, 肖德龙 2008 57 3027]
[2] Sheng L, Wang L P, Wu J, Li Y, Peng B D, Zhang M 2011 Chin. Phys. B 20 055202
[3] Sheng L, Qiu M T, Hei D W, Qiu A C, Cong P T, Wang L P, Wei F L 2011 Acta Phys. Sin 60 055205 (in Chinese) [盛亮, 邱孟通, 黑东炜, 邱爱慈, 丛培天, 王亮平, 魏福利 2011 60 055205]
[4] Hammer D A, Sinars D B 2001 Laser and Particle Beams 19 377
[5] Pikuz S A, Shelkovenko T A, Mingaleev A R, Hammer D A, Neves H P 1999 Phys. Plasmas 6 4272
[6] Stephens J, Neuber A, Kristiansen M 2012 Phys. Plasmas 19 032702
[7] Sheng L, Li Y, Yuan Y, Peng B D, Li M, Zhang M, Zhao J Z, Wei F L, Wang L P, Hei D W, Qiu A C 2014 Acta Phys. Sin. 63 055201 (in Chinese) [盛亮, 李阳, 袁媛, 彭博栋, 李沫, 张美, 赵吉祯, 魏福利, 王亮平, 黑东炜, 邱爱慈 2014 63 055201]
[8] Sarkisov G S, Rosenthal S E, Cochrane K R, Struve K W, Deeney C, McDaniel D H 2005 Phys. Rev. E 71 046404
[9] Sarkisov G S, Rosenthal S E, Struve K W 2008 Phys. Rev. E 77 056406
[10] Hall G N, Chittenden J P, Bland S N, Lebedev S V, Bott S C, Jennings C, Palmer J B A, Suzuki-Vidal F 2008 Phys. Rev. Lett. 100 065003
[11] Hoyt C L, Knapp P F, Pikuz S A, Shelkovenko T A, Cahill A D 2012 Appl. Phys. Lett. 100 244106
[12] Harvey-Thompson A J, Lebedev S V, Burdiak G, Wiasman E M, Hall G N, Suzuki-Vidal F, Bland S N, Chittenden J P, De-Grouchy P, Khoory E, Pickworth L, Skidmore J, Swadling G 2011 Phys. Rev. Lett. 106 205202
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[1] Ding N, Zhang Y, Ning C, Shu X J, Xiao D L 2008 Acta Phys. Sin. 57 3027 (in Chinese) [丁宁, 张扬, 宁成, 束小建, 肖德龙 2008 57 3027]
[2] Sheng L, Wang L P, Wu J, Li Y, Peng B D, Zhang M 2011 Chin. Phys. B 20 055202
[3] Sheng L, Qiu M T, Hei D W, Qiu A C, Cong P T, Wang L P, Wei F L 2011 Acta Phys. Sin 60 055205 (in Chinese) [盛亮, 邱孟通, 黑东炜, 邱爱慈, 丛培天, 王亮平, 魏福利 2011 60 055205]
[4] Hammer D A, Sinars D B 2001 Laser and Particle Beams 19 377
[5] Pikuz S A, Shelkovenko T A, Mingaleev A R, Hammer D A, Neves H P 1999 Phys. Plasmas 6 4272
[6] Stephens J, Neuber A, Kristiansen M 2012 Phys. Plasmas 19 032702
[7] Sheng L, Li Y, Yuan Y, Peng B D, Li M, Zhang M, Zhao J Z, Wei F L, Wang L P, Hei D W, Qiu A C 2014 Acta Phys. Sin. 63 055201 (in Chinese) [盛亮, 李阳, 袁媛, 彭博栋, 李沫, 张美, 赵吉祯, 魏福利, 王亮平, 黑东炜, 邱爱慈 2014 63 055201]
[8] Sarkisov G S, Rosenthal S E, Cochrane K R, Struve K W, Deeney C, McDaniel D H 2005 Phys. Rev. E 71 046404
[9] Sarkisov G S, Rosenthal S E, Struve K W 2008 Phys. Rev. E 77 056406
[10] Hall G N, Chittenden J P, Bland S N, Lebedev S V, Bott S C, Jennings C, Palmer J B A, Suzuki-Vidal F 2008 Phys. Rev. Lett. 100 065003
[11] Hoyt C L, Knapp P F, Pikuz S A, Shelkovenko T A, Cahill A D 2012 Appl. Phys. Lett. 100 244106
[12] Harvey-Thompson A J, Lebedev S V, Burdiak G, Wiasman E M, Hall G N, Suzuki-Vidal F, Bland S N, Chittenden J P, De-Grouchy P, Khoory E, Pickworth L, Skidmore J, Swadling G 2011 Phys. Rev. Lett. 106 205202
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