A global heat flux model based on a fractional derivative of plasma pressureis proposed for the heat transport in fusion plasmas. The degree of thefractional derivative of the heat flux, $\alpha$, is defined through the powerbalance analysis of the steady state. The model was used to obtain theexperimental values of $\alpha$ for a large database of the JET Carbon-wall aswell as ITER Like-wall plasmas. The findings show that the average fractionaldegree 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 inthe JET plasmas. The model is expected to provide an accurate and a simpledescription of heat transport that can be used in transport studies of fusionplasmas.
Global scaling of the heat transport in fusion plasmas
Minucci, S.;
2020-01-01
Abstract
A global heat flux model based on a fractional derivative of plasma pressureis proposed for the heat transport in fusion plasmas. The degree of thefractional derivative of the heat flux, $\alpha$, is defined through the powerbalance analysis of the steady state. The model was used to obtain theexperimental values of $\alpha$ for a large database of the JET Carbon-wall aswell as ITER Like-wall plasmas. The findings show that the average fractionaldegree 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 inthe JET plasmas. The model is expected to provide an accurate and a simpledescription of heat transport that can be used in transport studies of fusionplasmas.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
