VSim for Plasma Acceleration

VSimPAPerforms large-scale simulations of laser-plasma and beam-plasma acceleration experiments with all the features necessary to represent the most complex experiments, and is ready to use right out of the box.
 
VSim colliding laser pulse simulation model
VSim [formerly Vorpal] simulations were essential to understanding the physical mechanism in LOASIS experiments that produced quasi-monoenergetic electron bunches for the first time from a laser-plasma accelerator.
– Dr. Cameron Geddes, Scientist, Lawrence Berkeley National Lab
 

VSim for Plasma Acceleration (VSimPA) is a flexible, multiplatform, high-performance, parallel software tool for computationally intensive plasma acceleration simulations. With its controlled dispersion algorithm, wakes and dephasing are accurately calculated. VSim for Plasma Acceleration includes reduced models for rapid prototyping of experimental designs, and its parallel capability can take advantage of the largest supercomputers to enable full-scale modeling. Work easily in the required dimensionality, whether 1D for the basics, 2D to capture transverse effects, or fully 3D to ensure all geometric effects are included.

VSim for Plasma Acceleration can be used to compute both laser-plasma and beam-plasma acceleration, including field-ionization induced injection. Use VSim for Plasma Acceleration for simulating controlled injection in a laser-plasma accelerator via colliding laser pulses. Model laser-plasma accelerations efficiently with a Lorentz boosted frame or the envelope model with VSimPA. Simulate actual experiments accurately by conducting large-scale simulations and model plasma acceleration with minimal numerical noise using VSim for Plasma Acceleration.

Vorpal, VSimPA's computational engine, has been used for multiple scientific discoveries, including the first "Dream Beam" discoveries, stable GeV acceleration, density-gradient injection, and the more recent "Trojan Horse" simulations. VSim/Vorpal has over 540 citations since it was introduced in 2004 in the Journal of Computational Physics. Its 45 citations per year make it the most frequently cited computational application capable of modeling plasma acceleration.

Tech-X understands that developing your own code or collaborating with an academic simulation research group are huge efforts that take time away from the research work itself and carry no guarantee of a well-supported and complete feature set. Designed for plasma-acceleration researchers in national laboratories or academia, VSim for Plasma Acceleration provides the necessary algorithms to handle accurate modeling of inherently complex plasma acceleration simulations with efficient parallel capability for very large-scale computations. Not only is VSimPA the only simulation code that is both fully-featured and commercially available, but VSim for Plasma Acceleration is supported by the same physicists, mathematicians, and engineers who developed the product. VSim for Plasma Acceleration comes complete with full simulation input file examples, so there is no need to invest valuable staff or student time developing or expanding a simulation code.

Regardless of your plasma acceleration modeling requirements, VSim for Plasma Acceleration is the economical simulation tool with a user-friendly front end and an easy learning curve that will decrease your time from concept to experiment design and interpretation. VSimPA easily installs and runs on Windows, Mac OS X, and Linux platforms.

 

Features

  • Arbitrary plasma density and laser pulse profiles, with shortcuts for common profiles
  • Comprehensive out-going boundary conditions
  • High-order particles
  • Non-uniform loading
  • Moving window
  • Variable weighting
  • Tagging
  • Laser pulse profiles/launchers
  • Digital smoothing
  • Perfect dispersion
  • Beam loading
  • Boosted frame
  • Enhanced loading
  • Histories, including particle tracking
  • Postprocessing
  • Parallel scalability
  • Friendly experts to provide world-class support

 

Example Simulations Included

These example problems are included with VSim for Plasma Acceleration to jumpstart finding the solution to your problem:

Textbook Example Using Visual Setup
Textbook Example Using Text Setup
Real World Examples Using Text Setup

 

Questions? Contact us

 

VSim Animation

Arrayed Waveguide Grating Simulated in Demultiplexing Mode

In this simulation, the fundamental mode is launched using a unidirectional wave launcher. Matching Absorbing Layers prevent reflections from simulation boundary. B_z is displayed in this visualization. The wave is coupled to the ring and next to the second waveguide.

Silicon Waveguide in Silica Cladding

Shown in the visualization are positive and negative contours (red and blue) of B_y. The clipped views with multiple contours of B_y are shown in the multicolored scenes. The unidirectionality of the mode launcher enables arbitrary placement of the wave source along the waveguide. Matched Absorbing Layers (MAL) reduce reflections at simulation boundaries.

 
Microring Resonator Simulation Setup and Visualization

The simulation geometry is set up in VSim using the graphical user interface. The visualization displays B_z. Matching Absorbing Layers prevent reflections from the simulation. The wave is coupled to the ring and next to the second waveguide. The fundamental mode is launched using a unidirectional wave launcher.

 
Colliding Laser Pulses Launch an Electron Beam into a Plasma Accelerator

This simulation visualization by Estelle Cormier-Michel of Tech-X was one of the 2011 U.S. Department of Energy's Scientific Discovery through Advanced Computing (SciDAC) program OASCR (for Office of Advanced Scientific Computing Research) award winners.

Laser-Wakefield Accelerators "Dream Beam"

All different incarnations of laser-wakefield accelerators. It shows the background electron density (surface) plus some high-energy particles (beam) as particles.

 
Magnetic Field

The electron density in a 2D simulation of the expansion of a two-component plasma (electrons, ions, at same temperature) in an ambient magnetic field (out of plane). It initially expands symmetrically, but due to the charge separation (on average faster electrons than ions), the electrons get pulled back into the center, leading to some radial oscillations. The ambient magnetic field causes the rotation.

That's a configuration as encountered e.g. after ignition of the target in an Inertial confinement Fusion experiment. This shows that the debris created in an ICF chamber could be confined by a strong magnetic field, thus protecting e.g. the optical inlets into the chamber.

Magnetron

A Magnetron simulation created using VSim.

 
Multipactor Comparison

The video shows a side-by-side comparison of the 2 secondary electron models and how the resonance zone of the realistic model is much wider than that of the simple model.

Photocathode Modeling

Photocathode simulation modeling performed with VSim. Animation created with POV-Ray.

 
TESLA Cavity

Different incarnations of the wakefields generated by the propagation of an electron beam in a TESLA cavity.

 

Plasma Sheath

ITER2x3sheath

Sheath potential on ITER ICRF antenna.

Sheath Plasma Current

This movie shows one of the 24 modules of the ITER RF antenna, immersed in plasma, with a sheath model. Left plot shows sheath potential and right plot shows Je plasma current.

 

Modeling ICRF Heating in Alcator C-Mod

Geometry Construction

This movie gives some detail on the construction of the geometry used to simulate Alcator C-Mod's field-aligned ICRF antenna in VSim. CAD files from the antenna (provided by MIT engineers) are imported to the VSim grid; thereafter, the antenna module is embedded in a half-torus rendering of C-Mod's vacuum vessel. Finally, an equilibrium plasma density profile (provided by MIT scientists) is loaded into the vessel.

Electric Field Contours

Vertical component of the electric field induced by the field-aligned ICRF antenna in the Alcator C-Mod device, in a simulation which imports plasma density and magnetic field profiles from experimental data. The geometry of the simulation is described in Modeling ICRF Heating in Alcator C-Mod: Geometry Construction. The phasing of the antenna straps is [0, π, 0, π]; complex patterns of fast wave propagation into and through the plasma core are clearly visible.

Plasma with Electric Field

Vertical component of the electric field induced by the field-aligned ICRF antenna in the Alcator C-Mod device, in a simulation which imports plasma density and magnetic field profiles from experimental data. In this animation the plasma profile is also shown; the data is the same as was used in Modeling ICRF Heating in Alcator C-Mod: Electric Field Contours, though the view is slightly different. The phasing of the antenna straps is [0, π, 0, π]; complex patterns of fast wave propagation into and through the plasma core are clearly visible.

Midplane Electric Field

Vertical component of the electric field induced by the field-aligned ICRF antenna in the Alcator C-Mod device, in a simulation which imports plasma density and magnetic field profiles from experimental data. In this animation the toroidal midplane of the device is shown; the data is the same as was used in Modeling ICRF Heating in Alcator C-Mod: Plasma with Electric Field, though the view is slightly different. The phasing of the antenna straps is [0, π, 0, π].

 
Poloidal Plane Electric Field

Vertical component of the electric field induced by the field-aligned ICRF antenna in the Alcator C-Mod device, in a simulation which imports plasma density and magnetic field profiles from experimental data. In this animation a two-dimensional poloidal cut across the antenna coax feeds is shown; the phasing of the antenna straps is [0, π, 0, π].

 

NIMROD

current3D

3D NIMROD simulation of the toroidal current density evolution based on an initial 2D reconstructed state from the DIII-D tokamak. This experimental discharge was characterized by an edge-localized mode free state with edge harmonic oscillations. See https://nimrodteam.org and https://fusion.gat.com/global/DIII-D for more information.

pressure3D

3D NIMROD simulation of the pressure evolution based on an initial 2D reconstructed state from the DIII-D tokamak. This experimental discharge was characterized by an edge-localized mode free state with edge harmonic oscillations. See https://nimrodteam.org and https://fusion.gat.com/global/DIII-D for more information.

 
VSim boosted frame simulation model
Boosted Frame

Simulation of laser plasma acceleration where the frame of the simulation moves relativistically along the laser pulse propagation direction and an electron beam is externally injected behind the laser pulse then accelerated to high energy.

VSim field ionization simulation model

Field Ionize

Simulation of a laser plasma acceleration problem where electrons are trapped in the plasma wakefield due to tunneling ionization by the laser field of nitrogen atoms present in the plasma.

VSim colliding laser pulse simulation model
Colliding Laser Pulse

Simulation of a laser plasma acceleration problem where electrons are trapped in the plasma wakefield due to interaction of two counter-propagating laser pulses.

VSim laser plasma acceleration simulation model

Laser Plasma Acceleration

Simulation of an intense laser pulse propagated up a plasma density ramp into a uniform underdense plasma creating an electron plasma wave.

VSim logo

Pay Only for the Functionality You Need

 

VSim packages provide the pricing flexibility and convenience you want.  Choose the package or set of packages that has the physics simulation functionality that you need.

VSim two stream instability simulation thumbnailVSim for Basic Simultaions logo
Perfect for learning basic electromagnetic, particle trajectory, and plasma physics. More...

VSim horn antenna model thumbnailVSim for Electromagnetics logo
Fast, Powerful FDTD for Electromagnetics that solves electromagnetic problems. More...

VSim klystron model thumbnailVSim for Microwave Devices logo
Electromagnetic and particle modeling features for magnetrons, klystrons, and More...

vsim capacitively coupled plasma 2D model thumbnailVSim for Plasma Discharges logo
Enables resolution of kinetic effects for discharges not observable in fluid simulations.  More...

VSim colliding laser pulse 3D model thumbnailVSim for Plasma Acceleration logo
Large-scale simulations of laser-plasma and beam-plasma acceleration experiments.  More...

 

VSim packages provide you with a diverse range of relevant examples, macros and the powerful graphical user interface to the simulation engine, together with embedded analysis tools. Functionality is collected in common packages to provide the pricing flexibility and convenience you want. Custom packages are also available to give even more flexibility in pricing. See the VSim Features Matrix.

Request a free VSim Evaluation or contact Tech-X Sales for a quote.

 

Online Tutorials

Watch VSim Video Tutorials on YouTube

 
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