Thermal effects in high power cavities for photoneutralization of D− beams in future neutral beam injectors
Thermal effects in high power cavities for photoneutralization of D− beams in future neutral beam injectors
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未来中性束注入器中 D− 束光中和的高功率腔中的热效应
DOI：
10.1063/1.4916467
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
W. Chaibi
中科院分区：
文献类型：
--
作者：
D. Fiorucci;Jiatai Feng;M. Pichot;W. Chaibi
光中和可能是未来聚变堆中性束注入器的一个关键问题。事实上，基于光剥离的中和与能量回收系统相结合将注射器的总效率提高了60%。这是SIPHORE注入器的概念，其中在重折叠腔中实现光中和[1]。然而，约1W的几兆瓦的腔内功率被吸收的反射镜涂层，并引起重要的热弹性变形。预期这将改变反射镜的光学行为并降低腔的增强因子。在本文中，我们估计这些影响，我们提出了一个热系统来补偿它。
Photoneutralization may represent a key issue in the neutral beam injectors for future fusion reactors. In fact, photodetachment based neutralization combined with an energy recovery system increase the injector overall efficiency up to 60%. This is the SIPHORE injector concept in which photoneutralization is realized in a refolded cavity [1]. However, about 1 W of the several megaWatts intracavity power is absorbed by the mirrors coatings and gives rise to important thermoelastic distortions. This is expected to change the optical behavior of the mirrors and reduce the enhancement factor of the cavity. In this paper, we estimate these effects and we propose a thermal system to compensate it.