Modeling of energy confinement improvement in high power JET discharges with neon seeding
Journal article, 2012

In order to reduce the heat load to the wall, in particular in the presence of a metallic wall, the radiated fraction is increased by means of impurity seeding. This paper aims at investigating qualitatively the balance between a degradation of the edge confinement and a potential reduction of the core turbulent transport due to the increase of effective charge, Zeff. The pedestal degradation due to the Ne seeding is taken as input. The impact of Zeff and radiative loss on the heat transport are modeled with the quasi-linear 1D fluid code RITM. The input parameters are taken from a series of Ne seeded discharges conducted in JET. Discharges with D, D + Ne and Ne only fueling are qualitatively analyzed. The model recovers the experimentally observed fact that, while the confinement is degraded from the D to the D + Ne seeded plasma, it is improved from the D + Ne to the Ne only seeded plasma.

Author

Sara Moradi

Chalmers, Applied Physics, Nuclear Engineering

C Bourdelle

The French Alternative Energies and Atomic Energy Commission (CEA)

M Z Tokar

Forschungszentrum Jülich

X Litaudon

The French Alternative Energies and Atomic Energy Commission (CEA)

Z Imbeaux

The French Alternative Energies and Atomic Energy Commission (CEA)

P Monier-Garbet

The French Alternative Energies and Atomic Energy Commission (CEA)

D Kalupin

European Fusion Development Agreement (EFDA)

B Weyssow

European Fusion Development Agreement (EFDA)

Plasma Physics and Controlled Fusion

0741-3335 (ISSN) 1361-6587 (eISSN)

Vol. 54 1 015004- 015004

Driving Forces

Sustainable development

Areas of Advance

Energy

Roots

Basic sciences

Subject Categories

Fusion, Plasma and Space Physics

DOI

10.1088/0741-3335/54/1/015004

More information

Latest update

4/5/2022 6