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The current within imploding multiwire tungsten arrays is measured using micro magnetic probes in the Qiangguang-1 facility at a current of 1.3 MA and rise time of about 70 ns. Difference in current distribution in multiwire arrays between with and without foam cylinder on the array axis is studied. Stable and reliable results are obtained for tungsten wire array Z-pinch with a wire diameter of 4.2 μm and an annular diameter of 12 mm. The results shows that the output of magnetic probe at a radius of 3.2 mm lags about 20 ns behind the discharge current pulse. After that, the ratio of inside current to the total current increases 20% within 20 ns and keeps steady for 30-40 ns. It is found that the foam cylinder has no appreciable influence on the inside current value in the initial stage of implosioin.
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Keywords:
- wire-array Z-pinch /
- ablated plasma /
- magnetic probe /
- current measurements
[1] Spielman R B, Deeney C, Channdler G A, Douglas M R, Matzen M K, McDaniel D H, Nash T J, Porter J L, Sanfor T W L, Seamen J F, Stygar W A, Struve K W, Breeze S P, McGurn J S, Torres J A, Zagar D M 1998 Phys. Plasmas 5 2105
[2] Ryutov D D, Derzon M S, Matzen M K 2000 Rev. Mod. Phys. 72 167
[3] Zukakishvili G G , Mitrofanov K N, Aleksandrov V V, Grabovskii E V, Oleinik G M, Porofeev I Y, Sasorov P V, Frolov I N 2005 Plasma Phy. Rep. 31 908
[4] Grabovskii E V, Zukakishvili G G, Mitrofanov K N, Oleoenik G M, Frolov I N, Sasorov P V 2006 Plasma Phy. Rep. 32 32
[5] Aleksandrov V V, Barsuka V A, Grabovskii E V, Gritsuk A N, Zukakishvili G G, Medovshchikov S F, Mitrofanov K N, Oleinik G M, Sasorov P V 2009 Plasma Phy. Rep. 35 200
[6] Sinar D B, Cuneo M E, Yu E P, Bliss D E, Nsh T J, Porter J L, Deeney C, Mazarakis M G, Sarkisov G S, Wenger D F 2004 Phys. Rev. Lett. 93 145002
[7] Xue F B, Yang J L, Xu R K 2010 High Power Laser and Particle Beams 22 2055 (in Chinese) [薛飞彪, 杨建伦, 徐荣昆2010 强激光与粒子束 22 2055]
[8] Huang J, Sun S K, Xiao D L, Ding N, Ning C, Zhang Y, Xue C 2010 Acta Phys. Sin. 59 6351(in Chinese) [黄俊, 孙顺凯, 肖德龙, 丁宁, 宁成, 张扬, 薛创2010 物理学报 59 6351]
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[1] Spielman R B, Deeney C, Channdler G A, Douglas M R, Matzen M K, McDaniel D H, Nash T J, Porter J L, Sanfor T W L, Seamen J F, Stygar W A, Struve K W, Breeze S P, McGurn J S, Torres J A, Zagar D M 1998 Phys. Plasmas 5 2105
[2] Ryutov D D, Derzon M S, Matzen M K 2000 Rev. Mod. Phys. 72 167
[3] Zukakishvili G G , Mitrofanov K N, Aleksandrov V V, Grabovskii E V, Oleinik G M, Porofeev I Y, Sasorov P V, Frolov I N 2005 Plasma Phy. Rep. 31 908
[4] Grabovskii E V, Zukakishvili G G, Mitrofanov K N, Oleoenik G M, Frolov I N, Sasorov P V 2006 Plasma Phy. Rep. 32 32
[5] Aleksandrov V V, Barsuka V A, Grabovskii E V, Gritsuk A N, Zukakishvili G G, Medovshchikov S F, Mitrofanov K N, Oleinik G M, Sasorov P V 2009 Plasma Phy. Rep. 35 200
[6] Sinar D B, Cuneo M E, Yu E P, Bliss D E, Nsh T J, Porter J L, Deeney C, Mazarakis M G, Sarkisov G S, Wenger D F 2004 Phys. Rev. Lett. 93 145002
[7] Xue F B, Yang J L, Xu R K 2010 High Power Laser and Particle Beams 22 2055 (in Chinese) [薛飞彪, 杨建伦, 徐荣昆2010 强激光与粒子束 22 2055]
[8] Huang J, Sun S K, Xiao D L, Ding N, Ning C, Zhang Y, Xue C 2010 Acta Phys. Sin. 59 6351(in Chinese) [黄俊, 孙顺凯, 肖德龙, 丁宁, 宁成, 张扬, 薛创2010 物理学报 59 6351]
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