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Poster De Conférence Année : 2017

Improvements in global modeling of gridded ion thrusters

Résumé

PEGASES is an ion-ion thruster concept developed at LPP for over ten years. The neutralization of the plume by alternate negative and positive ion extraction leads to a thruster design where no external neutralizer is required anymore. First 0D fluid models - or global models - of plasma thrusters were developed for DC ion thrusters operated with Xenon. The model was extended to RF gridded thrusters including more complex molecular iodine chemistry. Recently, neutral gas heating by ion acceleration in the sheath was added to the model, which has a very large influence on the neutral power balance. Following the description of collisionless heating in inductively coupled RF plasma provided in, stochastic heating was also taken into account both through an effective collision frequency, and a heating term in the electron power balance. defining the global model leads to a better predictability of the thruster efficiency. Both numerical PIC simulations and experiments are in progress to validate the analyses that were conducted here.
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Dates et versions

hal-02611348 , version 1 (18-05-2020)

Identifiants

  • HAL Id : hal-02611348 , version 1

Citer

Romain Lucken, Trevor Lafleur, Pascaline Grondein, Anne Bourdon, Pascal Chabert, et al.. Improvements in global modeling of gridded ion thrusters. International Workshop on Ion Propulsion and Accelerator Industrial Application, Mar 2017, CNR Nanotech, Bari, Italy. 2017. ⟨hal-02611348⟩
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