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Opportunity at Air Force Research Laboratory (AFRL)

Algorithm Development for Electromagnetic Plasma Simulation

Location

Directed Energy Directorate, RD/Engineering, Applied Sci, and Computer Science

RO# Location
13.10.03.B6938 Kirtland Air Force Base, NM 871175776

Advisers

Name E-mail Phone
Greenwood, Andrew D. andrew.greenwood@us.af.mil 505.846.6642

Description

Electromagnetic and low density plasma simulations have been dominated by the finite difference time domain technique coupled with a particle-in-cell approach. This dominance has been fueled by the relative ease of implementation combined by the nominal second order accuracy the scheme provides. The robustness of the scheme, combined with highly efficient parallel programming has allowed researchers to solve challenging problems with high confidence. However, because of the increased resolution available through high-performance computing, many limitations have been reached with the aformentioned scheme, such as accurate geometric representation, physically realistic representation of particle emission, correct simulation of subgrid forces, and efficient simulation of high-density plasmas. Many of these issues are observable in real-world simulations as an increased error, dropping a nonimally second order scheme to first order or below. This tendency is often seen in many of problems of interest to AFRL’s Directed Energy Directorate-e.g., in simulations of high-power microwave (HPM) devices-and it represents a major issue in the design process.

The goal of the research is to advance the state-of-the-art in EM/EM-PIC/EM-Fluid/EM-PIC-Fluid hybrid/parallel computing for improved simulation capabilities of HPM sources. This work spans the realm from basic to applied research and should result in both publications and potential incorporation into our in-house three-dimensional highly parallel EM-PIC code. An opportunity exists to develop algorithms from scratch, incorporate the algorithm in a multiphysics code, and validate against real-world problems currently being studied in the laboratory.

 

Reference

Nusinovich GS: in Modern Microwave and Millimeter-Wave Power Electronics, Edited by Barker RJ, Luhmann NC, Booske JH. Weinheim (Germany): Wiley-VCH, 872: 2005

 

Keywords:
Electromagnetic simulation; Particle-in-Cell (PIC); Parallel computing; High-power microwaves; Plasma simulation; Hybrid modeling; PIC-fluid; Subgrid models; DS-MCC;

Eligibility

Citizenship:  Open to U.S. citizens
Level:  Open to Postdoctoral and Senior applicants
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