"EGS to Order" Guided Tour
"EGS to Order" is a simulation tool to show what happens when radiation meets matter. It is important to be able to predict these interactions with precision when you need to:
- Ensure safe shielding around experiments that involve high-energy electrons and photons.
- Design better medical X-ray treatments.
- Design detectors for high-energy physics experiments.
Before going too far in this tour, you might want to learn how and why EGS was developed in the "About EGS" section.
In this tour we will discover the physics interactions that occur between individual photons and electrons. These processes are well understood. However, complexity arises when there are large numbers of interacting particles in a beam and atoms in matter. The EGS simulation accurately predicts outcomes in these complex cases -- it encodes the known physics and the probabilities of interaction in each material type.
Example EGS simulation image
Beam
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The image above is an example of pair production in a magnetic field (perpendicular to the screen). Some of the photons in a beam of 10 photons (yellow lines) interact with matter to produce positrons (red lines) and electrons (green lines).
To understand what is happening in this image (and other simulation images), follow our tour.
- Stop 1: Pictorial Code for Particles
- Stop 2: Simple Two Particle Physics Processes
- Stop 3: Sample EGS Images
