The breakup of methane under ITER divertor hydrogen plasma conditions for carbon chemical erosion analysis with CH spectroscopy
The breakup of methane under ITER divertor hydrogen plasma conditions for carbon chemical erosion analysis with CH spectroscopy
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DOI：
10.1088/0029-5515/50/9/095003
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发表时间：
2010-07
期刊：
影响因子：
3.3
通讯作者：
J. Westerhout;D. Borodin;S. Brezinsek;N. Lopes Cardozo;J. Rapp;D. Schram;G. van Rooij
中科院分区：
文献类型：
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作者：
J. Westerhout;D. Borodin;S. Brezinsek;N. Lopes Cardozo;J. Rapp;D. Schram;G. van Rooij
将甲烷（CH 4）注入Pilot-PSI中的高密度（Ne ≤ 1020 m−3）、低温（Te ≤ 1 eV）氢等离子体中，以确定在这种未探索的等离子体状态下的CH A-X光子效率。用三维Monte Carlo程序ERO研究了在这些等离子体条件下粒子输运和粒子反射对直接激发CH发射的影响。逆光子效率的模拟显示了完全烃粘附或无粘附（反射）之间的20%的差异。此外，它预测，颗粒运输可能会导致超过10倍的增加。然而，对于0.1 < Te < 1.0 eV，测得的逆光子效率恒定在100 ± 30。该恒定性与，和的解离重组一致，以产生激发CH而不是直接激发。这些结果形成了一个框架，在未来的聚变反应堆，如ITER原位碳侵蚀测量。
Methane (CH4) was injected into the high density (ne ∼ 1020 m−3), low temperature (Te ∼ 1 eV) hydrogen plasma in Pilot-PSI to determine the CH A–X photon efficiency in this unexplored plasma regime. The effects of particle transport and particle reflection on the emission of directly excited CH under these plasma conditions were assessed with the 3D Monte Carlo code ERO. The simulations of the inverse photon efficiency showed a difference of ∼20% between full hydrocarbon sticking or no sticking (reflection). In addition it predicts that particle transport may lead to more than a factor of 10 increase. The measured inverse photon efficiency is however constant at 100 ± 30 for 0.1 < Te < 1.0 eV. The constancy is consistent with dissociative recombination of , and to produce excited CH instead of direct excitation. These results form a framework for in situ carbon erosion measurements in future fusion reactors such as ITER.