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

fYear

2009

fDate

1-5 June 2009

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/FUSION.2009.5226429

Filename

5226429