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Accueil > A propos du LPP > Communication > Actualités archivées > 2019 > A paper by the low-temperature plasma team hits the front page of Physics of Plasmas journal

A paper by the low-temperature plasma team hits the front page of Physics of Plasmas journal

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R. Lucken, A. Bourdon, M. A. Lieberman, and P. Chabert. Instability-enhanced transport in low temperature 29magnetized plasma. Physics of Plasmas, 26(7):070702, 2019

 
 
This paper shows that the transport in low temperature, collisional, bounded plasma is enhanced by instabilities at a high magnetic fields. While the magnetic field confines the electrons in a stable plasma, the instability completely destroys the confinement such that the transport becomes independent of the magnetic field in the highly magnetized limit. An analytical expression of the instability-enhanced collision frequency is proposed, based on a magnetic field independent edge-to-center density ratio.

These fundamental studies belong to the doctoral works of Romain Lucken, who is supervised by Pascal Chabert and Anne Bourdon and registered at the doctoral school EDOM. The results were motivated by the study of the PEGASES reactor, an experimental prototype of plasma thruster patented at LPP in 2005. The LPPic code, developed thanks to the support of Safran Aircraft Engine since 2014, first by Vivien Croes, and then by Antoine Tavant, Romain Lucken, and Thomas Charoy, has generated simulation results that could guide theoretical model derivation on low pressure low temperature magnetized plasmas. Romain Lucken benefited from two research stays at the University of Berkeley that were very beneficial to improve the theoretical models, in the frame of a long-standing collaboration with with Mike Lieberman and his team. Finally, during this work, discussions with Özgür Gürcan, from the fusion team of LPP, allowed to better understand the perturbation theory in inhomogeneous plasmas, which is rarely formalized in the low-temperature plasma context. These original results were selected by the Physics of Plasmas journal for the cover of the August 2019 issue.

Another complementary paper was accepted in the Plasmas Sources Science and Technology journal in August 2019 : R. Lucken et al., Saturation of the magnetic confinement in weakly ionized plasma. More information on the subject is available in Romain Lucken’s PhD dissertation, whose defense is set on September 27th, 2019.

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