Particle transport C: Monte Carlo methods versus moment equations

This is the concluding of three articles introducing the basic concepts of the Monte Carlo method for radiation transport calculations. The demonstration calculations discussed in the previous articles give a basis for comparing the relative benefits and drawbacks of the Monte Carlo and transport equation approaches. We have seen that both strategies are based on averages […]

Particle transport B: Monte Carlo methods versus moment equations

This is the second of three articles introducing the basic concepts of the Monte Carlo method for radiation transport calculations. In this article, we’ll consider an alternative to the Monte Carlo treatment of the two-dimensional random walk: the derivation and solution of a transport equation. Here, we define an appropriate quantity averaged over a random distribution […]

Particle transport A: Monte Carlo methods versus moment equations

This is the first of three articles giving a brief introduction to Monte Carlo methods applied to electron/photon transport, the foundation of our GamBet package for X-ray science. In particular, I will use a simple example to show how Monte Carlo compares to transport equations (e.g., the diffusion equation). The fundamental issue is how to deal […]

Field Precision educational utilities

We support several utility programs to make life easier for Windows users. They are included in all our packages and are distributed for free to the scientific community. This article reviews what’s available and also introduces a new program, Boilerplate.

The utility collection started with the FP Universal Scale. It grew out of my frustration with conventional […]

Magnum for MRI facility shielding

I recently had an inquiry from the president of a company that creates magnetic shielding for MRI facilities. In the past, the company installed iron sheets in response to customer specifications. The company’s current goal is to assume more design responsibilities by developing an in-house computational capability. Figure 1 shows a typical MRI facility along with […]