聚变反应中产生的α粒子的自举电流

本文对聚变产生的α粒子自举电流进行了研究,研究中采用了简便的Pade近似形式,同时考虑了回旋角散射效应和慢化过程中牵引作用的影响,给出了α粒子自举电流计算的理论表达式.采用ITER装置参数进行了数值计算,得到了α粒子自举电流的密度分布和大小,研究了影响自举电流大小的物理因素.结果表明α粒子自举电流随中心等离子体初始温度、密度和α粒子初始能量的增大而增大.结果表明α粒子自举电流较小,只占总自举电流的7%左右.

Bootstrap current induced by fusion born alpha particles

The bootstrap current produced by fusion born alpha particles is investigated.Using a simple Pade approximation,both pitch angle scattering and effects of slowing down drag are considered. The theory expression of calculating the bootstrap current is given. The alpha particle induced bootstrap current density and total bootstrap current are obtained by numerically resolving in ITER with specific parameters,physical factors that affect the bootstrap current are studied. Numerical results show that,the bootstrap current increases with the initial temperature and density of the plasma centre and the alpha particles birth energy.