Variance reduction techniques in GamBet

The GamBet software suite calculates the interactions of energetic photons, electrons and positrons with matter. In a previous sequence of three articles (Monte Carlo methods versus moment equations: Part A, Part B and Part C), I discussed how Monte Carlo calculations approximate the behavior of large collections of particles. The essence of the Monte Carlo method […]

Moving thermal sources in HeatWave

The generation of X-rays via bremsstrahlung is energetically inefficient at electron beam energies of interest for medical applications. Therefore, high-power electron beams are necessary for procedures such as CT scans. Dissipation of energy to prevent target melting is a major issue. One solution is a rapidly-rotating target. Alternatively, we recently worked with a customer using a […]

New features for automatic program operation

One of the outstanding features of our software is the use of input scripts, a classic feature of early programs that we have updated. The term script refers to a text file of input data for a program run. Figure 1 shows the role of input scripts in Field Precision software. Years ago, the primary input […]

FP File Organizer: new feature

I feel there are two programs that are essential for efficient use of a personal computer:

text editor
two-window file manager

Regarding text editors, people who use NotePad or Word may as well tie a cement block to their mouse. The freeware ConText editor is such a good choice that I would not attempt to duplicate its function. On […]

Parallel processing optimization

The Professional version of the 3D field-solution programs Aether, HiPhi, Magnum, HeatWave, RFE3 and field updates in OmniTrak use parallel processing routines of OpenMP to achieve significant reductions in run-time on multi-core computers. Some users have reported that the programs sometimes fail to implement parallel processing. This article addresses two topics:

The limitations of parallel processing and […]