SOL parameters, and particle and heat fluxes at divertor targets from electric probe measurements in KSTAR

作者：Bak J G^*; Kim H S; Kim J; You K I; Hong S H; Bae M K

来源：Journal of the Korean Physical Society, 2014, 65(8): 1232-1238.

DOI：10.3938/jkps.65.1232

• e-folding length in SOL
• Particle and heat fluxes at divertor
• Electric probe diagnostics
• KSTAR

The plasma parameters in the scrape-off layer (SOL) region and the particle flux at the divertor target are measured by using a fast reciprocating Langmuir probe assembly (FRLPA) and a fixed edge Langmuir probe array (ELPA) in the KSTAR. The e-folding lengths of the plasma density (n (e) ) and the electron temperature (T (e) ), lambda (ne) and lambda (Te) , are obtained from the radial profile measurement using the FRLPA at the outboard mid-plane during ohmic and H-mode discharges. Particle fluxes measured by using the ELPA at the divertor target are mapped to the outboard mid-plane, and the fluxes are quite well matched to the radial profile of the particle flux from the FRLPA measurement. Finally, the peak heat flux at the divertor target during edge localized modes (ELMs) can be estimated to be up to 1.0 MWm(-2) for the neutral beam power of similar to 2.7 MW by using T (e) at the separatrix and lambda (Te) from the FRLPA measurements. In this work, the experimental results from the probe measurements in the KSTAR are presented.

• 出版日期2014-10