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HIGH ENERGY PARTICLE TRANSPORT IN STOCHASTIC MAGNETIC FIELDS IN CORONAL LOOPS

机译:冠状环中随机磁场中的高能粒子输送

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We study particle transport in the solar corona in the presence of magnetic fluctuations. We perform numerical simulations by injecting particles at the center of a model coronal loop, and by varying the turbulence correlation length λ, the turbulence level, and the particle energy. For large λ, the ratio between the Larmor radius and turbulence wavelength is small, and the magnetic moment is conserved. In this case, a fraction of the injected particles is trapped by magnetic mirroring in the magnetic loop near the injection region. The rest of the particles propagates freely along Β, corresponding to ballistic transport. Decreasing λ, that is increasing the ratio ρ/λ, the magnetic moment is no more well conserved, and pitch angle diffusion progressively sets in. Parallel transport changes progressively from ballistic to superdiffusive, and finally, for small λ, to diffusive. Perpendicular transport may also exhibit superdiffusive and subdiffusive behaviour.
机译:我们在磁波动存在下研究太阳能电晕的粒子运输。我们通过在模型冠圈的中心注入粒子来执行数值模拟,并且通过改变湍流相关长度λ,湍流水平和粒子能量来进行颗粒。对于大λ,马达半径和湍流波长之间的比率小,并且磁矩是保守的。在这种情况下,通过在注射区域附近的磁环中的磁性镜像捕获的一部分注入的颗粒。其余的颗粒沿β自由传播,对应于弹道传输。减小λ,即增加比率ρ/λ,磁矩不再节省良好,并且俯仰角扩散逐渐设置在。并行传输逐渐从弹道逐渐变化到超级抗灯,最后,对于小λ来说,较小,用于扩散。垂直的运输也可能表现出超级优质和沉闷的行为。

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