Title :
Development of large current negative ion source for LHD neutral injection
Author :
Kaneko, Q. ; Ando, A. ; Oka, Y. ; Takeiri, Y. ; Tsumori, K. ; Akiyama, R. ; Kawamoto, T. ; Kuroda, T. ; Kojima, H. ; Okuyama, T. ; Yamashita, Y.
Author_Institution :
Nat. Inst. for Fusion Sci., Nagoya, Japan
Abstract :
The R&D program on a large current negative ion source has been carried out at the National Institute for Fusion Science for the Large Helical Device Project. So far a 1/3-scaled model ion source has been examined. By seeding a small amount of cesium in discharge, we obtained a total current of 8.5 A with an extracting energy of 40 keV. 1.2 A of high density negative ion beam was obtained from the restricted area of the source with the current density of 54 mA/cm2. An engineering test of a vacuum-immersed source has also been performed
Keywords :
fusion reactor design; fusion reactor ignition; fusion reactors; ion sources; particle beam fusion accelerators; plasma beam injection heating; plasma heating; plasma toroidal confinement; 1.2 A; 1/3-scaled model ion source; 40 keV; 8.5 A; Cs; LHD neutral injection; Large Helical Device Project; discharge seeding; engineering test; extracting energy; fusion reactor; high density negative ion beam; large current negative ion source; total current; vacuum-immersed source; Current density; Filters; Ion sources; Magnetic separation; Plasma confinement; Plasma density; Plasma sources; Production; Research and development; Testing;
Conference_Titel :
Fusion Engineering, 1993., 15th IEEE/NPSS Symposium on
Conference_Location :
Hyannis, MA
Print_ISBN :
0-7803-1412-3
DOI :
10.1109/FUSION.1993.518372
