Progress in the development of the ITER baseline scenario in TCV
Journal article, 2024

Under the auspices of EUROfusion, the ITER baseline (IBL) scenario has been jointly investigated on AUG and TCV in the past years and this paper reports on the developments on TCV. Three ITER shapes, namely the JET, AUG and ITER IBL have been reproduced in TCV, illustrating that the higher the triangularity the larger the ELM perturbation and the more difficult it is to reach stationary states with q(95)< 3.6. It is found that the performance of TCV IBL is mainly limited by (neoclassical) tearing modes, in particular 2/1 modes which are triggered after a large ELM. It is demonstrated that the shorter the ELM period the larger beta(N) at the NTM onset. We show that these modes can be avoided with central X3 EC heating at relatively high q(95) and moderate beta(N). However, the lack of significant ECH at the high central densities obtained in TCV IBL scenario limits the duration of low q(95) cases to about four confinement times. During this time, density usually keeps peaking until (neoclassical) tearing modes are triggered. Nevertheless, the TCV IBL database covers the ITER target values (H-98y2 similar to 1, beta(N) similar to 1.8 at q(95 )similar to 3) and a slightly better confinement than requested for ITER is

ITER baseline scenario

pedestals

neoclassical tearing modes

Author

B. Labit

Ecole Polytech Fed Lausane EPFL

O. Sauter

Ecole Polytech Fed Lausane EPFL

T. Puetterich

Max Planck Society

F. Bagnato

Ecole Polytech Fed Lausane EPFL

Y. Camenen

Aix Marseille University

S. Coda

Ecole Polytech Fed Lausane EPFL

C. Contre

Ecole Polytech Fed Lausane EPFL

R. Coosemans

Ecole Polytech Fed Lausane EPFL

Frida Eriksson

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics

O. Fevrier

Ecole Polytech Fed Lausane EPFL

Emil Fransson

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics

A. N. Karpushov

Ecole Polytech Fed Lausane EPFL

O. Krutkin

Ecole Polytech Fed Lausane EPFL

S. Marchioni

Ecole Polytech Fed Lausane EPFL

A. Merle

Ecole Polytech Fed Lausane EPFL

A. Pau

Ecole Polytech Fed Lausane EPFL

L. Piron

University of Padua

Consorzio Rfx

M. Vallar

Ecole Polytech Fed Lausane EPFL

S. Van Mulders

Ecole Polytech Fed Lausane EPFL

I Voitsekhovitch

Consorzio Rfx

Plasma Physics and Controlled Fusion

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

Vol. 66 2 025016

Subject Categories

Fusion, Plasma and Space Physics

DOI

10.1088/1361-6587/ad1a40

More information

Latest update

2/16/2024