Study of the effects of ECH power and pulse length on preionization in the KSTAR Tokamak

Author

Bae, Young-soon ; Namkung, Won ; Cho, Moo Hyun ; England, Alan C.

Author_Institution

Pohang Univ. of Sci. & Technol., South Korea

Volume

31

Issue

4

fYear

2003

Firstpage

745

Lastpage

751

Abstract

In this paper, we present the results of a study of the preionization effects for the Korean Superconducting Tokamak Advanced Research (KSTAR) tokamak (R₀=1.8 m, a=0.5 m, κ=2, δ=0.8, B_T=3.5 T, I_p=2 MA, T_pulse=300 s) that is under construction by the Korea Basic Science Institute (KBSI). The preionization will be given by the Electron Cyclotron Heating (ECH) System with an 84-GHz 500-kW gyrotron tube being made by Communications and Power Industries. The ECH preionization effects are investigated by a 0-dimensional code (TECHP0D) that includes the operational scenarios of KSTAR tokamak. The code is now improved and advanced with carbon, oxygen, and iron impurity effects, and with the self and mutual inductances of seven pairs of superconducting poloidal coils for the KSTAR tokamak.

Keywords

Tokamak devices; ionisation; plasma impurities; plasma radiofrequency heating; plasma toroidal confinement; 0-dimensional code; 1.8 MA; 1.8 m; 3.5 T; 300 s; 500 kW; 84 GHz; C; ECH power; Fe; KSTAR Tokamak; Korean Superconducting Tokamak Advanced Research tokamak; O; carbon; electron cyclotron heating system; gyrotron tube; impurity effects; iron; mutual inductances; operational scenarios; oxygen; preionization; pulse length; self inductances; superconducting poloidal coils; Breakdown voltage; Circuits; Cyclotrons; Electrons; Heating; Impurities; Plasmas; Superconducting coils; Tokamaks; Vacuum breakdown;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2003.815474

Filename

1221862