• Doctorat
  • Orsay
Nom de l'entreprise / du laboratoire: LPGP
Encadrant: Tiberiu MINEA
Date de début: January 10, 2022

TMP-D&S team of LPGP is developing several models using different approaches aiming to describe and understand the behaviour of
pulsed high power ExB discharges. The best example is the high Power Impulse Magnetron Sputtering (HiPIMS) discharge, operating at
low pressure (< 1 Pa) and high current (~100A) during the pulse. The dynamic of this kind of discharge is very fast (~μs) and the time
dependence is required in all the models to capture the main phenomena gouvering the discharge.
Several 0D and 2D models have been successfully developed, but especially the 3D modeling of the electron instabilities was the major
achievement. The thesis program will focus on the non-standard operation condition, exploring the particularities of the plasma in these
extreme situations.
It becomes thus possible not only to describe the magnetized plasmas but also to quantify the electron transport across the magnetic
barrier, the aim of this thesis.
The modeling of pulsed high power ExB discharges using 2D is already performed in TMP-D&S team for very short pulses and in standard
operation conditions. We developped a global model describing the average behaviour of the plasma in the Ionization Region (IR), but also
a novel approcach called ‘pseudo-3D’ allowing to model very high density plasma, but particularly interesting to describe the electron
instabilities in magnetized plasmas and the electron transport across the magnetic barrier.
New approaches are possible to be implemented, for instance implicit PIC (Partcile-in-Cell).
(Year 1): IR Model (IRM) will be run for non-standard operation conditions followed by the Pseudo-3D model implementation for very high
plasma density and several magnetic field configurations.
(Year 2): Development of specific routines for the data processing allowing the numerical diagnostic of the plasma (e.g. electron diffusion,
plasma oscillations, flares propagation, etc.)
(Year 3): Optimization of the model and comparison to experimental results obtained in other European research teams, partners of this

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