Speaker
Description
Understanding and evaluating particle and energy exhaust in the divertor and scrape-off layer (SOL) regions of a tokamak are essential for the sustainable operation of future fusion devices such as ITER. Cross-field transport in the SOL is known to be dominated by intermittent, elongated convective structures called filaments or blobs. In this study, filament-induced cross-field heat and particle fluxes in the SOL region of the TCV tokamak are quantified using Gas Puff Imaging (GPI) and Thermal Helium Beam (THB) measurements of radial velocity, filament packing fraction, density, and temperature. Fluxes calculated from the combined GPI–THB analysis are compared with Langmuir probe measurements and benchmarked against GBS and SOLPS-ITER simulations, to assess the GPI–THB approach for estimating SOL fluxes. A parametric study is further conducted to examine the dependence of filamentary fluxes on plasma density, plasma current, and toroidal magnetic field orientation. No significant differences are observed between forward and reversed field configurations under comparable plasma conditions. The parametric dependence of fluxes across different TCV regimes, including QCE, LSN, and DN, will also be reported.