Link to the demonstrator: in English
Duration: 3 hours
Equipment: Basic materials to build cloud chamber
Author: Emmanuel Chaniotakis (EA)
This demonstrator introduces students to cloud chambers, the first experimental apparatus that enabled scientists to visualize elementary particles coming from the cosmos. Students are introduced to cosmic rays, they learn about the principles of operation of a diffusion cloud chamber, and with the help of their teacher they construct a simple diffusion cloud chamber in order to observe cosmic ray particle tracks in it.
To introduce students to the concept of particle detection.
To have students build a simple cloud chamber detector.
To teach students that invisible ionizing radiation can leave visible “footprints” and what these can be.
To initiate a discussion about cosmic rays.
Thermodynamics (adiabatic expansion, condensation, vaporization),
Atomic Structure: Ionization
- Cosmic Rays:
- Particle Detectors
By the end of this descriptor, students should be able to:
- describe the principles of operation of a cloud chamber.
- explain what happens when ionizing radiation enters the cloud chamber.
- discuss qualitatively the properties of a muon track observed in a cloud chamber.
- explain what happens when I change the overburden and the altitude of the location of the cloud chamber.
- Construction of a diffusion cloud chamber with simple materials.
- Observation of particle tracks due to cosmic ray interactions with the cloud chamber.