Laboratory generation of strong magnetic fields is of significance to many research fields including plasma and beam physics[
High Power Laser Science and Engineering, Volume. 4, Issue 3, 03000e27(2016)
Laboratory astrophysics with laser-driven strong magnetic fields in China
In this paper, the recent studies of laboratory astrophysics with strong magnetic fields in China have been reviewed. On the Shenguang-II laser facility of the National Laboratory on High-Power Lasers and Physics, a laser-driven strong magnetic field up to 200 T has been achieved. The experiment was performed to model the interaction of solar wind with dayside magnetosphere. Also the low beta plasma magnetic reconnection (MR) has been studied. Theoretically, the model has been developed to deal with the atomic structures and processes in strong magnetic field. Also the study of shock wave generation in the magnetized counter-streaming plasmas is introduced.
1 Magnetic-field generation in the laboratory
Laboratory generation of strong magnetic fields is of significance to many research fields including plasma and beam physics[
A laser-driven strong magnetic field up to 200 T has been demonstrated on the Shenguang-II (SG-II) laser facility of the National Laboratory on High-Power Lasers and Physics. The basic scheme is to produce strong magnetic fields from the cold electron flow in a laser irradiated open-ended coil[
The experiment layout is shown in Figure
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The laser parameters, magnetic-field strength, current and energy conversion efficiency, are all summarized in Table
2 Magnetic reconnection
MR is a universal physical process in plasmas, in which the stored magnetic energy is converted into high-velocity flows and energetic particles[
Figure
Following previous one, another experiment was performed to model the interaction of solar wind with dayside magnetosphere. Figure
Furthermore, we have studied the low beta plasma MR in our recent experiment. This is the first laboratory study of MR with an explicitly controlled magnetic-field environment produced by capacitor-coil target[
3 Spectra of plasma with strong magnetic field related to astrophysical objects
Magnetic fields are widely existed in universe, from the interior of stars to the astrophysical interstellar medium (ISM). For example, in x-ray binaries the magnetic-field strengths of accreting neutron stars could be larger than
The atomic structures and processes in strong magnetic field have been studied theoretically by various methods, such as finite element[
Recently, extremely strong magnetic field can be generated using high-power laser in laboratory. Those magnetic fields can be up to thousand Tesla[
4 Studying shock wave generation in magnetized counter-streaming plasmas
Energetic particles are ubiquitous in astrophysical plasmas. However, the physical acceleration process is not well understood. The most remarkable example is the solar energetic particles[
The scaled-down and controllable laboratory experiments, as an accessory to the astronomical observations, can closely study the collisionless shock wave using high-power lasers. Counter-streaming plasmas system is a test bed for studying such phenomena in laboratory[
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Fei-Lu Wang, Xiao-Xing Pei, Bo Han, Hui-Gang Wei, Da-Wei Yuan, Gui-Yun Liang, Gang Zhao, Jia-Yong Zhong, Zhe Zhang, Bao-Jun Zhu, Yan-Fei Li, Fang Li, Yu-Tong Li, Si-Liang Zeng, Shi-Yang Zou, Jie Zhang. Laboratory astrophysics with laser-driven strong magnetic fields in China[J]. High Power Laser Science and Engineering, 2016, 4(3): 03000e27
Special Issue: HIGH ENERGY DENSITY PHYSICS AND HIGH POWER LASER
Received: Mar. 30, 2016
Accepted: Jul. 7, 2016
Published Online: Nov. 7, 2016
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