Global scaling of the heat transport in fusion plasmas
Author(s)
Date Issued
2020
Type
article
Volume
2
Issue
1
Journal
Abstract
A global heat flux model based on a fractional derivative of plasma pressure
is proposed for the heat transport in fusion plasmas. The degree of the
fractional derivative of the heat flux, $\alpha$, is defined through the power
balance analysis of the steady state. The model was used to obtain the
experimental values of $\alpha$ for a large database of the JET Carbon-wall as
well as ITER Like-wall plasmas. The findings show that the average fractional
degree of the heat flux over the database for electrons is $\alpha \sim 0.8$,
suggesting a global scaling between the net heating and the pressure profile in
the JET plasmas. The model is expected to provide an accurate and a simple
description of heat transport that can be used in transport studies of fusion
plasmas.