Accelerators and detectors
There are over 10,000 accelerators worldwide: 5000 each in medicine (therapy, isotope production) and industry (e.g. used for ion implantation in semi conductors and into metal for hardening etc), plus over 100 used for basic research by a whole range of scientific disciplines.
The topic of particle acceleration and detection is useful as it illustrates many aspects of physics which students are likely to have studied already, and it introduces them to an area in which fundamental physics is making progress.
There are opportunities for demonstrations that illustrate the basic ideas of particle acceleration and detection.