Stephen Copplestone

Room 0.024
Institute of Aerodynamics and Gas Dynamics
Pfaffenwaldring 21
70569 Stuttgart
Germany

?@iag.uni-stuttgart.de

Research topics

  • Discontinuous Galerkin (DG)
  • Particle-In-Cell (PIC)
  • Maxwell’s equations
  • Perfectly Matched Layer
  • Laser Plasma Interaction
  • Coupled PIC-DSMC Simulations
  • High Performance Computing (HPC)

Research description

The process of laser ablation is gaining a more fundamental role in solid-state physics and material processing. Therefore, numerical studies of laser-solid interaction have been of special interest in the past. These investigations were, however, restricted to direct interactions and the effects on the solid body for which MD simulations were applied. The expansion of the plasma, which is created directly after the laser pulse impacts onto the surface, is also of importance due to subsequent events, e.g., laser-plasma interaction or the contamination of the solid body. These events have considerable influence on additional laser impacts, but have commonly been neglected in simulations conducted in the past.

The mesoscalic simulations in the project allow for an analysis of the plasma plume expansion after a laser impact and can therefore be used for the investigation of subsequent plasma-laser interaction. For this interaction, the laser pulse needs to be modeled numerically in form of electromagnetic waves and has to be incorporated in the method. The results of future simulations are then of interest for further MD simulations, because of the damping effect of the plasma on the laser pulse. This may change the environmental conditions of the laser-solid interaction process and additionally experimental comparisons may be conducted.

Presentations

2016

S. Copplestone at SFB 716 Colloquium, Stuttgart, Germany

PICLas: A Highly Flexible Particle Code for the Simulation of Reactive Plasma Flows Presentation

27.10.2016.

Abstract | BibTeX

S. Copplestone at ICOPS 2016, Banff, Alberta, Canada

PIC-DSMC Simulations of Plasma Plume Expansions with Ionization and Recombination processes Presentation

20.06.2016.

Abstract | BibTeX

S. Copplestone at SFB 716 Winter School 2016, Engelberg, Switzerland

High-Order Discontinuous Galerkin Methods: An Introduction Presentation

07.03.2016.

BibTeX

2015

S. Copplestone at SFB 716 Status Seminar 2015, Irsee, Germany

Coupled PIC-DSMC-Simulation of Laser Driven Ablative Gas Expansions Presentation

16.09.2015.

BibTeX

S. Copplestone at ICOPS 2015, Antalya, Turkey

Complex-Frequency Shifted Perfectly Matched Layers with Respect to Particle Treatment in a Particle-in-Cell Scheme Presentation

25.05.2015.

BibTeX

S. Copplestone at DECHEMA 2015, Frankfurt am Main, Germany

Coupled PIC-DSMC-Simulation of Laser Driven Ablative Gas Expansions Presentation

24.03.2015.

BibTeX

Publications

2017

S. M. Copplestone, P. Ortwein, C. D. Munz

Complex-Frequency Shifted PMLs for Maxwell's Equations With Hyperbolic Divergence Cleaning and Their Application in Particle-in-Cell Codes Journal Article

IEEE Transactions on Plasma Science, 45 (1), pp. 2-14, 2017.

Abstract | Links | BibTeX

2016

Pfeiffer, M., Copplestone, S., Binder, T., Fasoulas, S., Munz, C.-D.

Comparison of plasma plume expansion simulations using fully kinetic electron treatment and electron fluid models Proceeding

1786 (1), 2016.

Abstract | Links | BibTeX

W. Reschke, T. Binder, J. Kleinert, A. Mirza, P. Nizenkov, M. Pfeiffer, S. Fasoulas, S. Copplestone, P. Ortwein, C. D. Munz

Recent developments of DSMC within the reactive plasma flow solver PICLas Proceeding

1786 (1), 2016.

Abstract | Links | BibTeX

Copplestone, S., Binder, T., Mirza, A., Nizenkov, P., Ortwein, P., Pfeiffer, M., Fasoulas, S., Munz, C.-D.

Coupled PIC-DSMC Simulations of a Laser-Driven Plasma Expansion Incollection

Nagel, W E; Kröner, D H; Resch, M M (Ed.): High Performance Computing in Science and Engineering ‘15, Springer, 2016, ISBN: 978-3-319-24633-8.

Links | BibTeX

2015

Ortwein, P., Binder, T., Copplestone, S., Mirza, A., Nizenkov, P., Pfeiffer, M., Stindl, T., Fasoulas, S., Munz, C.-D.

Parallel Performance of a Discontinuous Galerkin Spectral Element Method Based PIC-DSMC Solver Incollection

Nagel, W E; Kröner, D H; Resch, M M (Ed.): High Performance Computing in Science and Engineering ‘14, Springer, 2015, ISBN: 978-3-319-10810-0.

Links | BibTeX