Bulletin of the American Physical Society
76th Annual Gaseous Electronics Conference
Volume 68, Number 9
Monday–Friday, October 9–13, 2023; Michigan League, Ann Arbor, Michigan
Session GR4: Modeling & Simulation V: Validation and Verification
1:30 PM–3:30 PM,
Thursday, October 12, 2023
Room: Michigan League, Henderson
Chair: Andrew Tasman Powis, Princeton Plasma Physics Laboratory
Abstract: GR4.00003 : Comparison of 1D PIC simulations with experimental electron measurements in an iodine plasma for electric propulsion.
2:00 PM–2:15 PM
Presenter:
Nicolas Lequette
(Ecole Polytechnique)
Authors:
Nicolas Lequette
(Ecole Polytechnique)
Benjamin Esteves
(Safran Spacecraft Propulsion)
Alejandro Alvarez Laguna
(Laboratoire de Physique des Plasmas, CNRS, E. Polytechnique)
Anne Bourdon
(Ecole Polytechnique)
Pascal Chabert
(Ecole Polytechnique)
Iodine, with a mass close to that of xenon and a lower ionization threshold, is a strong contender and may offer similar performances. However, the modeling and simulation of such plasma require additional attention due to its molecular and electronegative natures.
In this work, we aim to validate the implementation of iodine chemistry in a 1D-3V PIC code by comparing electron parameters with Langmuir probe measurement in an iodine ICP discharge. We improved the Monte Carlo collision routine to include electronic collisions with molecular iodine and added binary collisions to model negative ion losses in the volume. To simulate the finite volume of the experimental device, we model the Bohm flux in the unsimulated directions with a 2D h factor model taking electronegativity into account.
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