Author :
Nakashima, Kazuto ; Zushi, H. ; Maezono, N. ; Sakamoto, M. ; Yoshida, N. ; Tokunaga, K. ; Hirooka, Y. ; Shikama, T. ; Kado, S. ; Nishino, N. ; Nakahima, Y. ; Hanada, K. ; Sasaki, Kazuhiko ; Idei, H. ; Iyomasa, A. ; Kawasaki, S. ; Sato, K.N. ; Nakashima, H
Abstract :
The limiter surface temperature dependence on hydrogen recycling and molybdenum impurity production behavior was studied with optical spectroscopy during long pulse plasma discharges in TRIAM-1M. It has been observed that the Halpha intensity critically depends on the limiter surface temperature. The Mo-I intensity from the hot spot has shown a negative temperature dependence. This is believed to be due to the reduction of heat load and enhanced CX flux due to ion temperature rise
Keywords :
discharges (electric); evaporation; fusion reactor design; fusion reactor limiters; nuclear power stations; plasma impurities; plasma materials processing; plasma temperature; sputtering; Mo-I intensity; TRIAM-1M; enhanced CX flux; fusion power plant; heat load reduction; hot spot; hydrogen balmar lines; hydrogen recycling; impurity evaporation; impurity sputtering; ion temperature; limiter surface temperature; long pulse plasma discharges; molybdenum impurity production; molybdenum neutral lines; negative temperature; optical spectroscopy; plasma facing component; steady state operation; Hydrogen; Impurities; Plasma temperature; Production; Recycling; Spectroscopy; Steady-state; Surface discharges; Temperature dependence; Temperature sensors; particle recycling; plasma facing component; sputtering and evaporation of impurities; steady state; surface temperature;
