中文摘要：

超导托卡马克兆瓦级中性束注入器漂移管道是NBI的关键部件之一,它对减少中性束的能量损失,提高中性束的加热效率有着重要的意义。根据EAST兆瓦级NBI的强流、高功率、长脉冲运行的要求,运用Matlab软件对漂移管道内的束功率沉积进行编程模拟计算分析,得到了漂移管道内束功率沉积在不同束散角下的分布规律。研究结果表明中性束的能量以及中性束的束流发散角是影响漂移管道内束功率沉积的主要因素。为漂移管道系统、内部组件以及冷却系统的设计提供了理论依据。

英文摘要：

The beam power deposition of the million-watt（ MW）,neutral beam injector（ NBI） drift-duct,installed in the Experimental Advanced Superconducting Tokamak（ EAST）,was physically modeled and mumerically simulated with the software package Matlab,to reduce the energy loss of the neutral beam and imptobr the heating efficiency of the NBI.The impacts of the major factors,such as the energy and divergence angle of the neutral beam,with high current,high power,and long pulse,on the beam power deposition were evaluated. The simulated results show that the energy and divergence angle of the neutral beam significantly affect the beam power deposition. We suggest that the simulated results provide some useful information in the design optimization of the drift dut,its inner components and its cooling system.