Scaling of the scrape-off layer width during inter-ELM H modes on MAST as measured by infrared thermography

Abstract

The power load to the divertor surfaces is a key concern for future devices such as ITER, due to the thermal limits on the material surface. One factor that characterizes the heat flux to the divertor is the fall off length in the scrape-off layer (SOL), which recent empirical scalings have shown could be as small as 1 mm. These predictions are based on a multi-machine scaling of the heat flux width fitted using an expression for the divertor heat flux profile which includes a term for the exponential decay in the SOL and diffusion about the last closed flux surface (LCFS) in the private flux region.

arXiv comment20 pages, 16 figures

References in corpus (2)

• L-Mode and Inter-ELM Divertor Particle and Heat Flux Width Scaling on MAST
• Scrape-off layer ion temperature measurements at the divertor target in MAST by retarding field energy analyser

Cited by in corpus (4)

• Characterisation of the L-mode Scrape Off Layer in MAST: decay lengths
• The role of plasma-atom and molecule interactions on power \& particle balance during detachment on the MAST Upgrade Super-X divertor
• L-mode filament characteristics on MAST as a function of plasma current measured using visible imaging
• Overview of recent physics results from MAST