[intro music]
This is the 
Cloud Chamber experiment you can do in third
year Quantum Mechanics, where you can observe
for yourself the production of exotic subatomic
particles.
The Cloud Chamber is the precursor to modern
particle accelerators like Large Hadron Collider
used to study the Standard Model.
The cloud chamber contains vaporised ethanol
that is cooled with chilled circulating water
from the esky.
We can observe particle production in the
chamber from radiation emitted from radioactive
sources and also from cosmic radiation emitted
from the sun interacting with the vaporised
ethanol.
There is an electromagnet in the base, which
provides a Lorentz force to deflect charged
particles produced in the chamber, giving
some of the particles the curved trajectories
you can sometimes see.
You can observe cosmic, gamma and x-rays in
this experiment along with anti-matter positrons,
muons and anti-muons, and kaon and pion particles.
[outro music]
