Alpha particle diagnostics using impurity pellet injection (invited)
Alpha particle diagnostics using impurity pellet injection (invited)
复制标题
使用杂质颗粒注射进行α粒子诊断（邀请）
DOI：
10.1063/1.1143705
复制
发表时间：
1992
影响因子：
1.6
通讯作者：
S. Medley
中科院分区：
文献类型：
--
作者：
R. Fisher;J. McChesney;A. Howald;P. Parks;J. Snipes;J. Terry;E. Marmar;S. Zweben;S. Medley
我们提出了用杂质颗粒注入来测量反应等离子体中快约束α粒子的能量分布[R]。K. Fisher et al., Fusion technology . 13, 536(1988)]。注入颗粒周围的烧蚀云足够厚，入射α的平衡分数F∞0(E)应该在它们穿过云时被中和。通过观察在云的大空间区域中产生的中性离子（如Li+离子），我们可以利用dnHe0/dE = dnHe2+/dE·F∞0 (E,Li+)，从测量到的中性氦原子dnHe0/dE的能量分布确定入射α分布dnHe2+/dE。在德克萨斯实验托卡马克（TEXT）上进行了初步实验，我们将颗粒穿透与我们的杂质颗粒烧蚀模型进行了比较。B. Parks et al.，核能。Fusion 28, 477(1988)]，并测量了碳球团云中各种电离态的空间分布[R]。K. Fisher…
We have proposed using impurity pellet injection to measure the energy distribution of the fast confined alpha particles in a reacting plasma [R. K. Fisher et al., Fusion Technol. 13, 536 (1988)]. The ablation cloud surrounding the injected pellet is thick enough that an equilibrium fraction F∞0(E) of the incident alphas should be neutralized as they pass through the cloud. By observing neutrals created in the large spatial region of the cloud which is expected to be dominated by the heliumlike ionization state, e.g., Li+ ions, we can determine the incident alpha distribution dnHe2+/dE from the measured energy distribution of neutral helium atoms dnHe0/dE using dnHe0/dE = dnHe2+/dE⋅F∞0 (E,Li+). Initial experiments were performed on the Texas Experimental Tokamak (TEXT) in which we compared pellet penetration with our impurity pellet ablation model [P. B. Parks et al., Nucl. Fusion 28, 477 (1988)], and measured the spatial distribution of various ionization states in carbon pellet clouds [R. K. Fisher et a...