How to make your computer sound like a typewriter, redux

In a blog last year (How to make your computer sound like a typewriter), I described how to add typewriter sounds to a computer keyboard using Jingle Keyboard freeware. I recorded a sound set from an IBM Selectric and made it available to use with the program. The article, which also touched on why you might [...]

Steel 1008 and 1018 BH curves

I recently had an Internet experience that I have repeated far too often. I needed saturation data for 1008 and 1018 steel for a magnet calculation. These are two of the most common materials used in electromagnets, motors and transformers. The devices are clearly useful — their design involves 100s of thousands of people around the [...]

Designing electron sheet-beam injectors with OmniTrak

There has been considerable recent interest in the design of injectors for intense electron beams with non-circular cross sections. The motivating application is the generation of narrow sheet beams to drive novel high-frequency, high-power microwave sources. A sign of the importance of the problem is that U.S. taxpayers have felt compelled to spend 2.743 gazillion dollars [...]

Expanded plot features in MagWinder

One of the major task in simulating three-dimensional electromagnets is the definition of complex drive coils. The utility MagWinder is part of the Magnum program suite. Drive circuits are represented in Magnum by dividing them into a large set of short segments (or current elements). MagWinder provides an interactive environment where users can build magnet windings [...]

New CAD editor compatible with Mesh

Mesh is our automatic generator for 2D meshes of conformal triangular elements. The program includes a convenient Drawing Editor to define boundaries of regions (physical objects) in the solution volume. This mini-CAD utility is easy to use and has many useful features. Nonetheless we included the option to import data from popular CAD programs for two [...]