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通过求解二维含时非线性ＦｏｋｋｅｒＰｌａｎｃｋ方程，计算反应堆规模下氚的ＮＢＩ（平行注入）加热时等离子体各组分分布函数及反应率随时间的演化，讨论非麦氏分布对反应率的影响．结果表明：分析非麦氏分布对反应率的影响时，定义Ｔｅｆ＝２３∫１２ｍｖ２ｆ（ｖ）ｄｖ，η＝〈σｖ〉Ｎ〈σｖ〉Ｍ（ＴＤ，ＴｅｆＴ）是比较方便而恰当的．加热初期，η从１增加到最大值，然后逐渐下降．加热功率较大或者束能较高都会使η下降得小于１．当η下降到１时，Ｔ∥Ｔ升至约１０ｋｅＶ．
By solving the two-dimensional time-dependent nonlinear Fokker-Planck equation, the distribution function and reaction rate of plasma during the NBI (parallel injection) heating of reactor scale were calculated. The effects of non-Maxwell distribution on the reaction rate influences. The results show that it is convenient and appropriate to define Tef = 23∫12mv2f (v) dv and η = <σv> N <σv> M (TD, TefT) when analyzing the effect of non-Maxwell distribution on the reaction rate. At the beginning of heating, η increases from 1 to the maximum and then decreases gradually. Larger heating power or higher beam will make η drop less than 1. When η falls to 1, T∥T rises to about 10 keV.