Influence of stray light for divertor spectroscopy in ITER
Influence of stray light for divertor spectroscopy in ITER
复制标题
杂散光对 ITER 偏滤器光谱的影响
DOI：
10.1016/j.jnucmat.2014.11.057
复制
发表时间：
2015
影响因子：
3.1
通讯作者：
K. Itami
中科院分区：
文献类型：
--
作者：
S. Kajita;E. Veshchev;S. Lisgo;R. Barnsley;P. Morgan;M. Walsh;H. Ogawa;T. Sugie;K. Itami
采用射线追迹模拟方法定量研究了杂散光对ITER分光镜系统的影响。仿真结果表明，在等离子体发射强的分流器位置，杂散光可以忽略不计。然而，当等离子体强度较低时，杂散光会明显大于实际信号。氘和铍的排放被用于评估；特别是对于铍，由于在分流器区域的发射分布可能是不均匀的，因此杂散光的影响在某些位置，例如在分流器圆顶上方，是不可忽略的。
The influence of stray light in the divertor spectroscopy system in ITER is quantitatively investigated using a ray tracing simulation. Simulation results show that the stray light is negligible at positions in the divertor where the plasma emission is strong. However, it is also shown that the stray light can be significantly greater than the real signal if the plasma intensity is low. Deuterium and beryllium emissions are used for the assessment; for beryllium cases in particular, since the emission profile may be non-uniform in the divertor region, the influence of stray light can be non-negligible at some positions, e.g., above the divertor dome.