@article{oai:repo.qst.go.jp:00048169,
 author = {星野, 一生 and 澤田圭司 and 出井諒 and 徳永, 晋介 and 朝倉, 伸幸 and 清水, 勝宏 and 大野哲靖 and 星野 一生 and 徳永 晋介 and 朝倉 伸幸 and 清水 勝宏},
 issue = {6/8},
 journal = {Contributions to Plasma Physics},
 month = {Aug},
 note = {In the DEMO divertor, the neutral density becomes high to produce the full detachment and therefore the photon trapping can become important. In this paper, effects of the photon trapping on the DEMO divertor plasma has been studied. The pre-evaluation of the photon trapping effects on the fixed background plasma profile was carried out by using an iterative self-consistent collisional radiative model. The recombining plasma near the inner target and the private region changed to the ionizing plasma by the photon-excitation. Based on the pre-evaluation result, the database of the effective ionization rate coefficient including the photon transport inside a 2 mm sphere. Advantage of the 2 mm sphere approximation is that the extra calculation cost is not necessary. Iterative calculation of the SONIC including the photon trapping effects was carried out. While the electron density increased and the neutral density decreased in the wide region, the electron density decreases close to the inner strike point. This may be due to decrease in the ionization rate by decrease in the neutral density.},
 pages = {657--662},
 title = {Photon Trapping Effects in DEMO Divertor Plasma},
 volume = {56},
 year = {2016}
}