Drift of ablated material after pellet injection in a tokamak
Journal article, 2023

Pellet injection is used for fuelling and controlling discharges in tokamaks, and it is foreseen in ITER. During pellet injection, a movement of the ablated material towards the low-field side (or outward major radius direction) occurs because of the inhomogeneity of the magnetic field. Due to the complexity of the theoretical models, computer codes developed to simulate the cross-field drift are computationally expensive. Here, we present a one-dimensional semi-analytical model for the radial displacement of ablated material after pellet injection, taking into account both the Alfven and ohmic currents which shortcircuit the charge separation creating the drift. The model is suitable for rapid calculation of the radial drift displacement, and can be useful for e.g. modelling of disruption mitigation via pellet injection.

fusion plasma

plasma flows

Author

Oskar Vallhagen

Chalmers, Physics, Subatomic, High Energy and Plasma Physics

Istvan Pusztai

Chalmers, Physics, Subatomic, High Energy and Plasma Physics

P. Helander

Max Planck Society

S. L. Newton

Culham Science Centre

Tünde Fülöp

Chalmers, Physics, Subatomic, High Energy and Plasma Physics

Journal of Plasma Physics

0022-3778 (ISSN) 1469-7807 (eISSN)

Vol. 89 3 905890306

Runaway electrons in fusion plasmas

Swedish Research Council (VR) (2018-03911), 2018-12-01 -- 2021-12-31.

Subject Categories

Applied Mechanics

Fusion, Plasma and Space Physics

DOI

10.1017/S0022377823000466

More information

Latest update

7/4/2023 6