Title :
Simulation experiment of thermal transient events in ITER by use of magneti zed coaxial plasma gun
Author :
Kikuchi, Y. ; Fukumoto, N. ; Nakatsuka, M. ; Naga, M. ; Nakanishi, R.
Author_Institution :
Grad. Sch. of Eng., Univ. of Hyogo, Himeji, Japan
Abstract :
A compact-sized MCPG with a single discharge stage is developed so as to simulate transient heat loads such as type I ELMs in ITER. The MCPG produces H2 plasma with the electron density of 1-4 times 1021 m-3, the ion energy of 15 eV and the pulse width of 0.5 ms. It is found that the absorbed energy density measured by a calorimeter reaches 0.9 MJ/m2 which is comparable to transient heat load of type I ELMs expected in ITER. Erosion of tungsten due to the plasma irradiation produced by the MCPG was confirmed only at the edge parts of the specimen.
Keywords :
Tokamak devices; arcs (electric); calorimeters; electron density; fusion reactor divertors; plasma density; plasma guns; plasma simulation; H2 plasma; ITER; MCPG; calorimeter; electron density; fusion reactor divertor; magnetized coaxial plasma gun; plasma density; plasma discharge; plasma irradiation; plasma simulation; thermal transient events; type I ELM; Coaxial components; Density measurement; Discrete event simulation; Electrons; Energy measurement; Plasma density; Plasma measurements; Plasma simulation; Space vector pulse width modulation; Tungsten; ITER; divertor; magnetized coaxial plasma gun; transient heat load; tungsten;
Conference_Titel :
Fusion Engineering, 2009. SOFE 2009. 23rd IEEE/NPSS Symposium on
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2635-5
Electronic_ISBN :
978-1-4244-2636-2
DOI :
10.1109/FUSION.2009.5226429
