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  • Yang, Xianjun  (3)
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  • 1
    Online Resource
    Online Resource
    AIP Publishing ; 2016
    In:  Physics of Plasmas Vol. 23, No. 11 ( 2016-11-01)
    In: Physics of Plasmas, AIP Publishing, Vol. 23, No. 11 ( 2016-11-01)
    Abstract: This article proposes a one-dimensional physical model to investigate the compression of reversed-field configurations (FRCs) by an imploding cylindrical liner. In this model, axial contraction of FRCs is included and parallel thermal conduction is considered as well as the radial, approximately in the open field line region of FRCs. Comparison with Spencer's analytic model of FRCs adiabatic compression shows similar results. Modeling results also indicate that classical transport model is preferred in the magnetized target fusion regime and axial contraction plays an important role in the dynamics of compression of FRCs using an imploding liner.
    Type of Medium: Online Resource
    ISSN: 1070-664X , 1089-7674
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2016
    detail.hit.zdb_id: 1472746-8
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  • 2
    Online Resource
    Online Resource
    AIP Publishing ; 2016
    In:  Physics of Plasmas Vol. 23, No. 6 ( 2016-06-01)
    In: Physics of Plasmas, AIP Publishing, Vol. 23, No. 6 ( 2016-06-01)
    Abstract: The field reversed configuration (FRC) is one of the candidate plasma targets for the magneto-inertial fusion, and a high temperature FRC can be formed by using the collision-merging technology. Although the merging process and mechanism of FRC are quite complicated, it is thinkable to build a simple model to investigate the macroscopic equilibrium parameters including the density, the temperature and the separatrix volume, which may play an important role in the collision-merging process of FRC. It is quite interesting that the estimates of the related results based on our simple model are in agreement with the simulation results of a two-dimensional magneto-hydrodynamic code (MFP-2D), which has being developed by our group since the last couple of years, while these results can qualitatively fit the results of C-2 experiments by Tri-alpha energy company. On the other hand, the simple model can be used to investigate how to increase the density of the merged FRC. It is found that the amplification of the density depends on the poloidal flux-increase factor and the temperature increases with the translation speed of two plasmoids.
    Type of Medium: Online Resource
    ISSN: 1070-664X , 1089-7674
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2016
    detail.hit.zdb_id: 1472746-8
    Location Call Number Limitation Availability
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  • 3
    In: Physics of Plasmas, AIP Publishing, Vol. 24, No. 6 ( 2017-06-01)
    Abstract: Drift instabilities in a field reversed configuration are studied under conditions of magneto-inertial fusion (MIF). Specifically, the collisional effect is taken into account because of high-density plasmas in MIF where the drift wave frequency is smaller than the electron-ion collision frequency. Dispersion relations are based on the two fluid equations including the collisional terms; meanwhile, the electromagnetic effect is also considered due to high β values (β is the ratio of plasma pressure to magnetic pressure). It is found that in the limit of low β, the behavior of instabilities described by the dispersion relations in the present paper would become like drift instabilities in tokamaks, where β ∼ 0.1. Therefore, in the MIF case, electromagnetic drift instabilities could be driven by electron-ion collisions due to the charge separation effect. The collisions also bring the phase difference between the perturbed density and the potential perturbation, which is significant for the particle transport.
    Type of Medium: Online Resource
    ISSN: 1070-664X , 1089-7674
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2017
    detail.hit.zdb_id: 1472746-8
    Location Call Number Limitation Availability
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