标题： 关于抛物线磁层中的有效粒子加速 显示英文标题

标题： On the effective particle acceleration in the paraboloidal magnetic field

摘要： 在稳态轴对称磁流体力学（MHD）流的框架内考虑了抛物线极向磁场中粒子加速效率的问题。 对于较大的Michel磁化参数，可以在接近无力场解的情况下线性化流方程，并像Beskin、Kuznetsova和Rafikov（1998年）对单极磁场所做的那样，自洽地解决问题。 结果表明，在快磁声表面上，粒子的洛伦兹因子不超过标准值。 另一方面，在超音速区域，洛伦兹因子随远离旋转轴的距离线性增长，几乎达到最大值。 这对应于Poynting能量通量几乎完全转化为粒子动能。 显示英文摘要

摘要： The problem of the efficiency of particle acceleration for parabolic poloidal magnetic field is considered within the approach of steady axisymmetric MHD flow. For the large Michel magnetization parameter it is possible to linearize the stream equation near the force-free solution and to solve the problem self-consistently as was done by Beskin, Kuznetsova and Rafikov (1998) for monopole magnetic field. It is shown that on the fast magnetosonic surface the particle Lorentz factor does not exceed the standard value. On the other hand, in the supersonic region the Lorentz factor grows linearly with the distance from the rotational axis, reaching almost its maximal value. This corresponds to almost the full conversion of the Poynting energy flux into the particle kinetic one.