Title :
Characteristics of Magnetized Coaxial Plasma Gun for Simulation Experiment of Thermal Transient Events in ITER
Author :
Kikuchi, Yusuke ; Nakanishi, Ryota ; Nakatsuka, Motoaki ; Fukumoto, Naoyuki ; Nagata, Masayoshi
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of Hyogo, Himeji, Japan
fDate :
3/1/2010 12:00:00 AM
Abstract :
A compact-sized magnetized coaxial plasma gun (MCPG) with a single discharge stage is developed in order to simulate transient heat loads such as type I edge-localized modes (ELMs) in ITER. The MCPG produces hydrogen plasmas with an electron density of 1- 4 ?? 1021 m-3, an ion energy of 15 eV and a pulsewidth of 0.5 ms. It is found that the absorbed energy density measured by a calorimeter reaches 0.9 MJ/m2 which is comparable with a transient heat load of type I ELMs expected in ITER. Erosion of tungsten due to the plasma irradiation produced by the MCPG is confirmed only at the edge parts of the specimen in this experiment.
Keywords :
Tokamak devices; calorimetry; discharges (electric); hydrogen; plasma density; plasma diagnostics; plasma instability; plasma simulation; H; ITER; absorbed energy density; calorimeter; edge-localized modes; electron density; electron volt energy 15 eV; hydrogen plasmas; ion energy; magnetized coaxial plasma gun; plasma irradiation; single discharge stage; thermal transient events; transient heat loads; tungsten erosion; Divertor; ITER; magnetized coaxial plasma gun (MCPG); transient heat load; tungsten;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2009.2034378
