20th European Fusion Theory Conference 2-5 October 2023, Padova - Italy

Session

Oral session 12 - Turbulent transport and PWI

5 Oct 2023, 11:00

Sala Rossini (Caffè Pedrocchi)

Conveners

Oral session 12 - Turbulent transport and PWI: O12

• Chair: Dirk Van Eester

85. Ultra long turbulent eddies, magnetic topology, and the triggering of internal transport barriers (I.16)

Arnas Volcokas

05/10/2023, 11:00

Invited

In this work, we use local nonlinear gyrokinetic simulations of tokamaks to demonstrate that turbulent eddies can extend along magnetic field lines for hundreds of poloidal turns when the magnetic shear $\hat{s}$ is very weak or zero [1]. We find that as the magnetic shear is lowered, the parallel eddy length scales like 1/$\hat{s}$. At zero magnetic shear, their length is limited only by...

88. Conceptual Design of Halo Machine (O.15)

Vadim Yanovskiy

05/10/2023, 11:40

Oral

Over the past three decades, extensive research has been conducted on halo currents to assess the thermal [1] and electromagnetic stresses [2] imposed on the ITER wall during plasma disruptions. However, the contribution of these currents to the generation of sideways forces on the tokamak vacuum vessel still remains poorly understood, which raises concerns [3, 4]. In order to address this...

26. Flow-shear suppression of anisotropic plasma turbulence (O.16)

Mr Plamen Ivanov (University of Oxford)

05/10/2023, 12:05

Oral

The performance of magnetic-confinement-fusion devices is often limited by the presence of turbulent fluctuations that lead to enhanced transport and energy losses. Both experimental and numerical investigations have shown that the turbulent fluctuations, and thus the transport properties of magnetised plasma, are influenced by the presence of sheared flows [1, 2, 3, 4]. Such flows can be...