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Focusing on Einzel Lenses with Particle Tracing Simulation
Einzel lenses are used to focus charged particle beams in cathode ray tubes (CRTs). To properly analyze an einzel lens, we need to study the charged particles in the lens subject to appropriate...
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Analyzing an Electrodynamic Ion Funnel with COMSOL Multiphysics®
Within mass spectrometers, plasmas are often used to ionize a sample and an inert background gas. Before the ions produced in the plasma are sent into the mass filter, which determines the sample’s...
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Studying the Van Allen Belts with Particle Tracing Simulation
The Van Allen radiation belts consist of highly energetic charged particles that have become trapped in Earth’s magnetic field. These particles follow the shape of the field and give the belts a...
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Optimizing Combustion Particle Control in an Electric Filter Design
The greenhouse effect has made it necessary for scientists to develop combustion processes that minimize the accumulation of carbon dioxide in the atmosphere. Possible fuels in these processes include...
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Keynote Video: Designing Improved Heart Pumps with Simulation
Heart failure is a global health concern, affecting millions of people and keeping them from their everyday lives. But what if there was a device that could keep patients’ hearts pumping and even...
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Efficiently Analyze Charge Exchange Cell Designs Using Applications
Charge exchange cells can alter the charge of an ion beam, making them useful in fusion reactors, particle accelerators, and semiconductor fabrication equipment. Improving the design of these devices,...
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Speeding Up DNA Separation in a Microchannel via Simulation
When investigating a crime, forensic scientists sometimes use DNA evidence to identify suspects. DNA contains more than identifying information, though, like clues to our genetic makeup. DNA separation...
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Protecting Aerospace Devices via an Ion-Material Interaction Benchmark
In outer space and other harsh radiation environments, high-energy ions and protons pierce materials and affect nearby electronic systems. Known as a single-event effect (SEE), the particle radiation...
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Computational Electromagnetics Modeling: Which Module to Use?
A question we get asked all of the time is: “Which of the COMSOL products should be used for modeling a particular electromagnetic device or application?” In addition to the capabilities of the core...
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Modeling a Pierce Electron Gun in COMSOL Multiphysics®
Electron guns are frequently used in cathode ray tubes, electron microscopes, spectrometers, and particle accelerators. The electron gun extracts electrons from a hot cathode or a plasma, then...
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What Formulation Should I Use for Particle Tracing in Fluids?
When you first try to run a particle tracing simulation with very small particles in a fluid — generally tens of microns in diameter or smaller — you might notice the time-dependent solver taking much...
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