Laboratory study of diffusion region with electron energization during high guide field reconnection
Laboratory study of diffusion region with electron energization during high guide field reconnection
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DOI：
10.1063/1.4932345
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发表时间：
2015-10
影响因子：
2.2
通讯作者：
K. Yamasaki;S. Inoue;S. Kamio;Takenori G Watanabe;T. Ushiki;Xuehan Guo;T. Sugawara;K. Matsuyama;N. Kawakami;T. Yamada;M. Inomoto;Y. Ono
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文献类型：
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作者：
K. Yamasaki;S. Inoue;S. Kamio;Takenori G Watanabe;T. Ushiki;Xuehan Guo;T. Sugawara;K. Matsuyama;N. Kawakami;T. Yamada;M. Inomoto;Y. Ono
在UTST并合实验中，当引导场与重联磁场之比Bg/Brec>10时，测量了高引导场重联过程中X点附近的浮置电位分布。浮置电位的测量结果表明，在快速重联阶段，由于感应电场的极化作用，在X点周围形成了四极结构的电位。此外，我们的浮动电位测量揭示了在X点附近的平行电场的存在。当感应电场（E ind）和静电电场（E es）的场向分量在远离X点处相互抵消时，在X点附近E ind超过E es，表明该区域偏离了理想MHD准则。扩散区向外流区延伸，扩散区的尺度长度为离子趋肤深度的数量级，这与VTF实验结果有很大的不同。根据测量的磁场和…
Floating potential profile was measured around the X-point during high guide field reconnection in UTST merging experiment where the ratio of guide field ( Bg) to reconnecting magnetic field ( Brec) is Bg/Brec>10. Floating potential measurement revealed that a quadrupole structure of electric potential is formed around the X-point during the fast reconnection phase due to the polarization by inductive electric field. Also, our floating potential measurement revealed the existence of parallel electric field in the vicinity of the X-point. While field-aligned components of inductive electric field ( E∥ind) and electrostatic electric field ( E∥es) cancel out with each other away from the X-point, E∥ind exceeds E∥es around the X-point, indicating the deviation from ideal MHD criterion within the region. The diffusion region extends in the outflow region and the scale length of region is an order of ion skin depth, which is quite different from the VTF experiment result. Based on the measured magnetic field an...