Pellet fuelling deposition measurements on Jet and TFTR
Pellet fuelling deposition measurements on Jet and TFTR
复制标题
Jet 和 TFTR 上的颗粒燃料沉积测量
DOI：
10.1088/0029-5515/32/12/i08
复制
发表时间：
1992
期刊：
影响因子：
3.3
通讯作者：
H. Park
中科院分区：
文献类型：
--
作者：
L. Baylor;G. Schmidt;W. Houlberg;S. Milora;C. Gowers;W. Bailey;M. Gadeberg;P. Kupschus;J. Tagle;D. Owens;D. Mansfield;H. Park
从汤姆逊散射诊断测量的电子密度后立即采取的颗粒注入到欧洲联合环（JET）和托卡马克聚变试验堆（TFTR）的氘颗粒的有效径向沉积轮廓已被确定。从这些测量中推导出的弹丸烧蚀率与传统弹丸烧蚀理论预测的不同。在烧蚀过程中增强的径向传输的可能性已被检查，以确定这是否可以解释理论和实验之间的差异，但没有证据已经找到支持这样的解释。在颗粒烧蚀过程中发射的巴耳末α光的时间演变被发现是从密度分布测量确定的有效颗粒烧蚀率不同。作者得出结论，为了预测和再现所观察到的有效烧蚀率和穿透深度，必须修改传统弹丸烧蚀模型的屏蔽机制
The effective radial deposition profile of deuterium pellets injected into the Joint European Torus (JET) and the Tokamak Fusion Test Reactor (TFTR) has been determined from Thomson scattering diagnostic measurements of electron density taken immediately after pellet injection. The pellet ablation rate deduced from these measurements differs from that predicted by conventional pellet ablation theory. The possibility of enhanced radial transport during the ablation process has been examined to determine whether this can explain the difference between theory and experiment, but no evidence has been found to support such an explanation. The temporal evolution of the Balmer alpha light emitted during pellet ablation is found to be different from the effective pellet ablation rate determined from the density profile measurement. The authors conclude that the shielding mechanisms of conventional pellet ablation models have to be modified in order to predict and reproduce the observed effective ablation rate and penetration depth