Temporal and spatial PFC temperature profiles in KSTAR 2010

Author

Bang, E.N. ; Kim, K.M. ; Kim, H.T. ; Kim, H.K. ; Lee, K.S. ; Hong, S.H. ; Jeon, Y.M. ; Bak, J.G. ; Kim, W.C. ; Yang, H.L. ; Oh, Y.S.

Author_Institution

KSTAR Res. Center, Nat. Fusion Res. Inst., Daejeon, South Korea

fYear

2011

fDate

26-30 June 2011

Firstpage

1

Lastpage

4

Abstract

In- and outboard Plasma Facing Components (PFCs) of KSTAR (Korea Superconducting Tokamak Advanced Reasearch) have been fully installed in 2010 for D shaped diverted plasmas. Before the start of plasma operation, the PFCs were baked up to 200 °C by hot nitrogen gas circulation system to remove impurities including water. The surface temperature of the PFC tiles was monitored by 200 thermo-couple sensors during the plasma operation (plasma shot or Glow Discharge Cleaning(GDC)), and the temporal and spatial (poloidal) temperature profiles are obtained. Depending on the heat flux on each tile, the surface temperature shows time-dependency. After 1-hour morning He GDC, the temperature of the PFCs at inboard side has reached at 40 °C. After an H-mode shot, the temperature of divertor tiles around the striking points was substantially increased. The time-averaged total heat flux after an specific H-mode in 2010 was estimated to be approximately 10kW/m².

Keywords

Tokamak devices; fusion reactor design; fusion reactor divertors; fusion reactor operation; plasma temperature; plasma toroidal confinement; PFC temperature profiles; PFC tiles; Superconducting Tokamak Advanced Reasearch; diverted plasmas; divertor tiles; gas circulation system; plasma facing components; plasma operation; specific H-mode; surface temperature; temperature profiles; thermo-couple sensors; time-averaged total heat flux; Heating; Nitrogen; H-mode; PFC baking; Plasma Facing Component(PFC); heat flux;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering (SOFE), 2011 IEEE/NPSS 24th Symposium on

Conference_Location

Chicago, IL

ISSN

1078-8891

Print_ISBN

978-1-4577-0669-1

Electronic_ISBN

1078-8891

Type

conf

DOI

10.1109/SOFE.2011.6052256

Filename

6052256