VSim for Microwave Devices

VSimMDPowered by our powerful, flexible Vorpal simulation engine, includes a full suite of electromagnetic and particle modeling features for magnetrons, klystrons, gyrotrons, traveling-wave-tubes, and similar devices.

 

VSim helix travelling wave tube model

VSim for Microwave Devices (VSimMD) is a flexible, multiplatform, high-performance, parallel software tool for computationally intensive simulations of microwave devices with accurate simulation of dielectric and metallic shapes using a conformal mesh. Shapes can be easily imported from CAD files or constructed in the user-friendly front end, VSimComposer, and are rapidly meshed with the proprietary VMesh algorithm. The advanced graphics capability of VSim for Microwave Devices displays detailed profile and particle distribution data.

VSim for Microwave Devices allows one to model microwave devices with electron beams and including primary and secondary emission of electrons. Primary emission mechanisms include Child-Langmuir, Fowler-Nordheim, Richardson-Dushman, and user specified. Secondary emission algorithms include Furman-Pivi and user specified. Diagnostics from VSim for Microwave Devices provide performance information such as power, voltages, and electron currents. Multipacting at multiple power levels can be computed in one simulation with the variable coupling electrons.

VSim for Microwave Devices can be used in the design cycle of specific components such as electron guns, collectors, and couplers. Perform microwave simulation and model high power microwave devices, including kinetic electromagnetic simulation of magnetrons, TWTs, and klystrons. VSim for Microwave Devices enables you to optimize your simulation for multipacting, shunt impedance, and S-Matrix coefficients. Use VSim for Microwave Devices to determine multipacting and perform electromagnetic simulation software with kinetic beams

Examples of simulations of devices and components are included with the product, giving you a jump start for creating your own simulations. Because VSim for Microwave Devices runs on Linux, Windows, and Mac OS X, and runs in parallel, you'll achieve maximum performance. The full suite of electromagnetic and particle modeling features and optimized performance are available at an affordable price. Reduce your time from simulation to manufacture of microwave devices with VSim for Microwave Devices.

Overview

VSim for Microwave Devices models microwave devices. Included in VSim for Microwave Devices is a full suite of electromagnetic and particle modeling features for magnetrons, cavities, klystrons, gyrotrons, traveling-wave-tubes, and similar devices. VSim for Microwave Devices enables design of specific components such as electron guns, striplines, collectors, and couplers. VSim computation software for modeling devices includes the capability to simulate particle physics such as Child-Langmuir space-charged limited emission and Fowler-Nordheim tunnelling emission.

Diagnostics from VSim for Microwave Devices provide performance information such as power, voltages, and electron currents. The advanced graphics capability of VSim for Microwave Devices displays detailed profile and particle distribution data. Simulation examples of devices and components are included with the product, giving you a jump start for creating your own simulations.

VSim for Microwave Devices is optimized for solving large problems on parallel computing hardware.  VSim for Microwave Devices example simulations are included to reduce your learning curve.  Because VSim for Microwave Devices runs on Linux, Windows, and Mac OS X, and runs in parallel, you'll achieve maximum performance.  The full suite of electromagnetic and particle modeling features and optimized performance are available at an affordable price.  Reduce your time from simulation to manufacture of microwave devices with VSim for Microwave Devices.

 

Advantages

  • Accurate modeling of beam-generated electromagnetic radiation
  • Includes surface effects such as multipacting or field emission
  • Includes interaction with background gasses

Features

  • Structures
  • CAD import
  • Waveguide Ports
  • Surface emitters
  • Detailed particle physics with more algorithms than other simulation tools
  • Superior customer support by world-class experts
  • Well-supported software that runs on all platforms and runs in parallel
  • Ability to work from device examples similar to the your own device
  • Availability of non-proprietary output formats that you control, enabling you to access your data with public domain software, Matlab, or your own favorite tool
  • Interoperability with other VSim packages
  • Variable Weight and Fixed Weight Particles
  • General framework for both standard emission types and user-customized emission types
  • Secondary Emitter Particle Source for collector analysis
  • Particle Sinks
  • Unidirectional, and other current-based Ampere-Law sources
  • Analytic and importable Static Magnetic Field capability
  • Field and Particle Histories and Feedback
  • Noise filter
  • Lossy Dielectrics
  • Resistive Wall-loss calculation

 

Example Simulations Included

These example problems that demonstrate S-matrix trajectories, thermionic and photo field emission, multipactor saturation are included with VSim for Microwave Devices to jumpstart finding the solution to your problem:

Textbook Examples Using Visual Setup
Real World Examples Using Visual Setup
Textbook Examples 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 helix twt model
Helix TWT

Helix TWTs, which are used for communications, employ a helical slow wave structure which slows the field down to match the beam velocity as this Vorpal example illustrates.

VSim magnetron simulation showing Bz component

Rising Sun Magnetron

Rising sun magnetron shows a strong pi mode operation in this VSimMD example.

VSim multipacting model

Multipacting

Estimate multipacting threat with enhanced features that look across the entire range of field strengths at once.

 
VSim model of the center of a two cavity klystron
Two Cavity Klystron

This example shows a simple two cavity klystron amplifier.

 

VSim magnetron geometry

Magnetron Geometry



VSim model of superconducting (crab) cavities for accelerators

Superconducting Cavities Used for Accelerators

Visualization of Fermilab's A15 crab cavity shows the electric field lines in green, and the magnetic field lines in red.  The magnetic field strength at the wall is shown by color map with the the largest field strengths in orange and the smallest in blue.  The pipes extending from the end wall are for measuring.

 
VSim magnetron particles simulation
Magnetron 2D Particles


 

 

VSim S matrix model

S-Matrix

S-matrix dual mode cavity.

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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