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Numerical Solutions to Poisson Equations Using the Finite-Difference Method [Education Column]
Abstract
The Poisson equation is an elliptic partial differential equation that frequently emerges when modeling electromagnetic systems. However, like many other partial differential equations, exact solutions are difficult to obtain for complex geometries. This motivates the use of numerical methods in order to provide accurate results for real-world systems. One very simple algorithm is the Finite-Difference Method (FDM), which works by replacing the continuous derivative operators with approximate finite differences. Although the Finite-Difference Method is one of the oldest methods ever devised, comprehensive information is difficult to find compiled in a single reference. This paper therefore provides a tutorial-level derivation of the Finite-Difference Method from the Poisson equation, with special attention given to practical applications such as multiple dielectrics, conductive materials, and magnetostatics.
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“Although simulations of very similar negative ion sources for neutral beam injection (NBI) for nuclear fusion reactors are abundant in literature 73-78 , simulations covering the interior of gridded ion engines are not very diffuse in the plasma propulsion community, although a few examples exist where, the ion generation region (sometimes called 'driver' region) is not selfconsistently simulated”
From Plasma propulsion modeling with particle-based algorithms (2023) · cites this paper as [79]
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Plasma propulsion modeling with particle-based algorithms
Taccogna, F., Cichocki, F., Eremin, D., Fubiani, G., & Garrigues, L. (2023) · Journal of Applied Physics · doi:10.1063/5.0153862 · Cited by 29
Metadata
- Authors
- Nagel, J. R.
- Corresponding author
- Nagel, James R.
- ORCID
- Nagel, James R.
- Venue
- IEEE Antennas and Propagation Magazine
- Published
- 2014-08
- Volume
- 56
- Issue
- 4
- Pages
- 209-224
- ISSN
- 1045-9243 (ISSN-L)
- OpenAlex
- W2316277765
- Cited by
- 52
- References
- 0
- Citations by year
- 2026: 3 · 2025: 10 · 2024: 8 · 2023: 6 · 2022: 6 · 2021: 5 · 2020: 4 · 2019: 4 · 2018: 1 · 2017: 1 · 2016: 1 · 2015: 3
- FWCI
- 0.89
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- IEEE Antennas and Propagation Magazine (publishedVersion)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Electromagnetic Simulation and Numerical Methods
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Electromagnetic Scattering and Analysis
- Physical Sciences › Engineering › Computational Mechanics › Advanced Numerical Methods in Computational Mathematics
- Keywords
- Poisson equation, finite difference method, elliptic equations, electromagnetic simulation, numerical solution of partial differential equations, conductive materials, magnetostatics
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- CoChat. (2026). Citation check: Numerical Solutions to Poisson Equations Using the Finite-Difference Method [Education Column]. https://app.cochat.ai/papers/10.1109/map.2014.6931698
- The paper
- Nagel, J. R. (2014). Numerical Solutions to Poisson Equations Using the Finite-Difference Method [Education Column]. IEEE Antennas and Propagation Magazine. https://doi.org/10.1109/map.2014.6931698