Author/Authors :
Kizu، نويسنده , , K and Hosogane، نويسنده , , N and Hiratsuka، نويسنده , , H and Ichige، نويسنده , , H and Sasajima، نويسنده , , T and Masaki، نويسنده , , K and Miya، نويسنده , , N and Honda، نويسنده , , M and Iwahashi، نويسنده , , T and Sasaki، نويسنده , , N and Lang، نويسنده , , P.T، نويسنده ,
Abstract :
A centrifugal pellet injector and a guide tube for magnetic high-field side (HFS) injection were developed in JT-60U. The injector can eject trains of up to 40 cubic (1.9 mm)3 deuterium pellets at frequencies of 1–10 Hz and velocities of 0.2–1.0 km/s. Pellet injection experiments into ohmic heating (OH) plasma were performed. From plasma density measurement, central fueling and enhanced fueling rate compared to gas puffing were observed for magnetic low-field side (LFS) injections. The results of HFS injection through the guide tube connected to the upper port of the vessel showed that the pellet velocity exceeding 220 m/s caused pellet destruction inside the tube.
Keywords :
Ohmic heating (OH) , Low-field side (LFS) , Centrifugal pellet injector , High-field side (HFS)
