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本文提出了一种基于弹丸注入技术和（α，ｎγ）核反应的α粒子诊断方案。它的基本原理是，将由铍制成的弹丸高速射入聚变等离子体中，在其未被等离子体完全烧蚀掉前，测量α粒子打到弹丸表面时发生核反应所放出的γ射线和中子。由于９Ｂｅ与α粒子间两个反应产额的分支比随着入射α粒子能量的变化而迅速升降，因此通过测量这两个反应分支的反应数及其比值，就可以获得弹丸附近α粒子的密度和能量信息。由于此诊断核反应集中发生在弹丸表面，因此易于在空间上确定反应发生的位置，从而可以诊断出α粒子的空间分布。这是目前其它一些诊断方案所难以做到的。
In this paper, an α particle diagnostic scheme based on projectile injection technology and (α, nγ) nuclear reaction is proposed. Its basic principle is that the projectile made of beryllium is injected into the fusion plasma at a high speed and before it is completely ablated by the plasma, the gamma rays and neutrons emitted by the nuclear reaction after the alpha particles hit the surface of the projectile are measured . Since the branching ratio of the two reaction yields between 9Be and α increases rapidly as the energy of the incident α particle changes, the density of α particles near the projectile can be obtained by measuring the number of reactions and the ratio of the two reaction branches And energy information. Since this diagnostic nuclear reaction occurs centrally on the surface of the projectile, it is easy to spatially determine the location of the reaction and thus to diagnose the spatial distribution of alpha particles. This is currently difficult to do with some other diagnostic programs.