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November 13-14, 2017 Paris, France
5th International Conference on
PLASMA CHEMISTRY AND
PLASMA PROCESSING
Journal of Biotechnology and Phytochemistry
Volume 1, Issue 2 Plasma Chemistry 2017
The influence of N2 in high density low
temperature H2 plasma by means of magnum-PSI
and numerical simulations
Renato Perillo, IGJ Classen, TW Morgan, WAJ Vijvers, HJN Van Eck, W Lu, R
Chandra, R Barrois and MR de Baar
Dutch Institute for Fundamental Energy Research, Netherlands
Experiments have shown that impurity seeding in the
tokamak’s divertor region leads to a net reduction of
power loads onto the targets. Nitrogen is currently the leading
candidate for impurity seeding in ITER. Volume processes such
as molecular-activated-recombination (MAR) and electron-ion
recombination (EIR), together with impurity radiation losses,
may all contribute to achieve a detached plasma regime, in
which the heat and particle fluxes are greatly reduced before
reaching the surface. Little is known on the detailed plasma-
chemical processes occurring in such scenario in the presence
of nitrogen. To study this complex system, an extensive global
plasma model of H2+N2 chemistry has been set up on using
PLASIMO code. The model has generated qualitative results
highlighting new molecular-assisted reactions paths, suggesting
N2H+ as principal ion mediator and NH as main electron donor
in charge exchange with H+. The resulting primary mechanisms
are being implemented in Eunomia, a 3D Monte-Carlo code
based on the test particle approximation method. All the 14
vibrational states of H2 are included, together with a large set of
chemical reactions and species, namely H, H2, N, N2 and related
ions. Dedicated experiments on plasma-surface-interactions in
relevant conditions with nitrogen seeding have been carried out,
providing qualitatively the predicted results. Magnum-PSI is a
unique linear plasma generator, located at DIFFER, capable of
reproducing ITER-relevant plasma conditions.
Biography
Renato Perillo is a PhD student at the Dutch institute for fundamental energy
research (DIFFER) among the group plasma edge physics and diagnostics (Nuclear
fusion branch). He carried out his studies in Padova, Italy, obtaining a master’s
degree in environmental chemistry in 2014 (final mark 9/10). His thesis is focused
on advance oxidation of volatile organic compounds (VOCs) by means of non-
thermal plasma applications. From january to september 2015 he worked as guest
researcher in computational plasma physics with the EPG group at the Eindhoven
University of Technology, where he developed an extended global plasma model
of low temperature hydrogen plasma. Since November 2015 he is employed at
differ institute, working on plasma detachment and impurity seeding using numerical
simulations and the linear plasma device magnum-PSI, a unique machine capable
to mimic the plasma-surface interactions foresee to occur in ITER.
Renato Perillo et al., J Biot Phyt 2017