Spontaneous transition of the plasma confinement mode was observed in thehelical-axis heliotron device 'Heliotron J' for three different plasma heating schemes, i.e.ECH-only, NBI-only and the combination of EC...Spontaneous transition of the plasma confinement mode was observed in thehelical-axis heliotron device 'Heliotron J' for three different plasma heating schemes, i.e.ECH-only, NBI-only and the combination of ECH and NBI. The transition seems to occur above a certaincritical density. In addition to the confinement transition, a spontaneous shift of the hittingposition of the divertor plasma flux on the wall was observed. This shift could be related with thechange of the edge field topology caused by non-inductive toroidal currents.展开更多
Ozone is one of the trace gases in atmosphere. Although it is very small in amount,it is of great importance to human being and biosphere because it absorbs effectively and cuts down the intensity of the solar ultravi...Ozone is one of the trace gases in atmosphere. Although it is very small in amount,it is of great importance to human being and biosphere because it absorbs effectively and cuts down the intensity of the solar ultraviolet radiation.In recent years, what the public are concerned of is the perturbation in the amount of O3 in the atmosphere resulted from human activities. The variation of ozone in atmosphere would affect photochemical reactions to a great extent. In addition, ozone acts as a thermal source in stratosphere. Con-展开更多
基金The project partially supported by the Grant-in-Aid for Science Research of MEXT in Japan and by the Collaboration Program of the Laboratory for Complex Energy ProcessesIAEKyoto University
文摘Spontaneous transition of the plasma confinement mode was observed in thehelical-axis heliotron device 'Heliotron J' for three different plasma heating schemes, i.e.ECH-only, NBI-only and the combination of ECH and NBI. The transition seems to occur above a certaincritical density. In addition to the confinement transition, a spontaneous shift of the hittingposition of the divertor plasma flux on the wall was observed. This shift could be related with thechange of the edge field topology caused by non-inductive toroidal currents.
文摘Ozone is one of the trace gases in atmosphere. Although it is very small in amount,it is of great importance to human being and biosphere because it absorbs effectively and cuts down the intensity of the solar ultraviolet radiation.In recent years, what the public are concerned of is the perturbation in the amount of O3 in the atmosphere resulted from human activities. The variation of ozone in atmosphere would affect photochemical reactions to a great extent. In addition, ozone acts as a thermal source in stratosphere. Con-
