131 research outputs found
Plasma propulsion simulation using particles
This perspective paper deals with an overview of particle-in-cell / Monte
Carlo collision models applied to different plasma-propulsion configurations
and scenarios, from electrostatic (E x B and pulsed arc) devices to
electromagnetic (RF inductive, helicon, electron cyclotron resonance)
thrusters, with an emphasis on plasma plumes and their interaction with the
satellite. The most important elements related to the modeling of plasma-wall
interaction are also presented. Finally, the paper reports new progress in the
particle-in-cell computational methodology, in particular regarding
accelerating computational techniques for multi-dimensional simulations and
plasma chemistry Monte Carlo modules for molecular and alternative propellan
Parametric study of the radial plasma-wall interaction in a Hall thruster
An investigation on the influence of relevant parameters on an annular Hall effect thruster plasma discharge is performed using a radial particle-in-cell simulation code with secondary electron emission from the walls and prescribed axial electric and radial magnetic fields. A simulation with true-secondary electrons only is taken as reference. First, the near-wall conductivity effects on the magnetized secondary electrons are illustrated by doubling the , allowing a further code validation. Second, when secondary backscattered electrons are included, the enhanced secondary emission yields lower sheath potential drops and primary electron temperature. Moreover, the dominant backscattered electrons increase the average secondary electrons emission energy, greatly affecting its temperature anisotropy ratio and increasing the replenishment level of the wall collectable tails of the primary electrons velocity distribution function. Third, the effect of the true-secondary electrons emission energy on the potential profile is shown to be negligible, the latter being mainly set by the dominant magnetic mirror effect. Finally, a planar case featuring symmetric plasma profiles permits to confirm the validity of the large cylindrical asymmetries present in the reference case, induced by the combined effects of the geometric expansion, the magnetic mirror and the centrifugal force (due to the drift). A smaller deviation of the primary electron momentum equation from the Boltzmann relation along the magnetic lines is still found in the planar case, induced by the parallel temperature non-uniformity.The UC3M researchers have been supported by the PROMETEO-CM project, Grant number Y2018/NMT-4750 (Comunidad de Madrid/FEDER/FSE). Additional funding for A DomĂnguez-Vázquez came from Project ESP2016-75887 (Spain's National Research and Development Plan - MINECO/FEDER) F Taccogna has been supported by the italian Ministero dell'Istruzione, dell'UniversitĂ e della Ricerca (MIUR) under the CLOSE project (grant ARS01_00141)
Numerical simulations used for a validity check on the laser induced photo-detachment diagnostic method in electronegative plasmas
One Dimensional Hybrid-Vlasov Simulation of a Hall Thruster
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/97103/1/AIAA2012-4313.pd
Plasma-sheath instability in Hall thrusters due to periodic modulation of the energy of secondary electrons in cyclotron motion
Radiative Aerothermodynamics of Entering Space Vehicles: Toward the Use of State-to-State Approach
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