Measurement of jet evolution and electron energy spectrum during the process of laser-driven magnetic reconnection

	Measurement of jet evolution and electron energy spectrum during the process of laser-driven magnetic reconnection
	Zhang Kai1,2 ; Zhong Jia-Yong 3; Pei Xiao-Xing1,2 ; Li Yu-Tong 4; Youichi, Sakawa 5; Wei Hui-Gang1 ; Yuan Da-Wei1 ; Li Fang 4; Han Bo1 ; Wang Chen6
刊名	ACTA PHYSICA SINICA
	2015-08-20
卷号	64 期号:16
关键词	magnetic reconnection electron acceleration
英文摘要	Magnetic reconnection (MR) is a universal physical process in plasma, in which the stored magnetic energy is converted into high-velocity flows and energetic particles. It is believed that MR plays an important role in many plasma phenomena such as solar fare, gamma-ray burst, fusion plasma instabilities, etc.. The process of MR has been studied in detail by dedicated magnetic-driven experiments. Here, we report the measurements of magnetic reconnection driven by Shenguang II lasers and Gekko XVII lasers. A collimated plasma jet is observed along the direction perpendicular to the reconnection plane with the optical probing. The present jet is very different from traditional magnetic reconnection outflows as known in the two-dimensional reconnection plane. In our experiment, by changing the delay of optical probing beam, we measure the temporal evolution of jet from 0.5 ns to 2.5 ns and its velocity around 400 km/s is deduced. High-collimated jet is also confirmed by its strong X-ray radiation recorded by an X-ray pinhole camera. With the help of optical interferograms we calculate the jet configuration and its density distribution by using Abel inverting technique. A magnetic spectrometer with an energy range from hundred eV up to one MeV is installed in front of the jet, in the direction perpendicular to the reconnection plane, to measure the accelerated electrons. Two cases are considered for checking the acceleration of electrons. The results show that more accelerated electrons can be found in the reconnection case than in the case without reconnection. We propose that the formation and collimation of the plasma jet, and the electron energy spectrum may be possible directly influenced by the reconnection electric field, which is very important for understanding the energy conversion in the process of MR and establishment of the theoretical model. Finally the electron energy spectra of three different materials Al, Ta and Au are also shown in our work. The results indicate that the higher atomic number material can obtain a better signal-noise ratio, which provides some helpful references for our future work.
收录类别	SCI
语种	英语
WOS记录号	WOS:000362976800034
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5556]
专题	国家天文台_光学天文研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 4.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 5.Osaka Univ, Inst Laser Engn, Osaka 5650871, Japan 6.China Acad Engn Phys, Shanghai Inst Laser Plasma, Shanghai 201800, Peoples R China 7.Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China 8.Natl Lab High Power Lasers & Phys, Shanghai 201800, Peoples R China 9.China Acad Engn Phys, Res Ctr Laser Fus, Mianyang 621900, Peoples R China
推荐引用方式 GB/T 7714	Zhang Kai,Zhong Jia-Yong,Pei Xiao-Xing,et al. Measurement of jet evolution and electron energy spectrum during the process of laser-driven magnetic reconnection[J]. ACTA PHYSICA SINICA,2015,64(16).
APA	Zhang Kai.,Zhong Jia-Yong.,Pei Xiao-Xing.,Li Yu-Tong.,Youichi, Sakawa.,...&Zhao Gang.(2015).Measurement of jet evolution and electron energy spectrum during the process of laser-driven magnetic reconnection.ACTA PHYSICA SINICA,64(16).
MLA	Zhang Kai,et al."Measurement of jet evolution and electron energy spectrum during the process of laser-driven magnetic reconnection".ACTA PHYSICA SINICA 64.16(2015).