Preventing recombination in a diffusion cloud chamber?

In summary, diffusion cloud chambers use a combination of increased humidity and air currents to prevent recombination of ions and electrons, eliminating the need for an electrostatic field.
  • #1
CloudChamber
29
1
Hello all,
I built an expansion cloud chamber and noted that an electrostatic field was needed to see the ionizing radiation. I know this is needed to prevent recombination of the ions and their free electrons. However, I built a diffusion cloud chamber a while ago that called for no electric field what so ever, and it still functioned perfectly. Does anyone know why diffusion cloud chambers do not need an electric field to delay recombination? What in a diffusion cloud chamber prevents recombination?
Thanks!
 
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  • #2
Diffusion cloud chambers use different mechanisms than expansion cloud chambers to prevent recombination. In diffusion cloud chambers, the droplets of condensed vapor form in an environment with increased relative humidity. This higher relative humidity reduces the mobility of ions and electrons, so they stay together for a longer time period and have less chance of recombining. Additionally, diffusion cloud chambers use air currents that help to keep the charged particles apart.
 

1. What is recombination in a diffusion cloud chamber?

Recombination in a diffusion cloud chamber is the process by which charged particles, such as electrons and ions, combine to form neutral particles. This can occur when the concentration of charged particles is high enough for them to interact and recombine.

2. Why is it important to prevent recombination in a diffusion cloud chamber?

Preventing recombination in a diffusion cloud chamber is important because it allows for the accurate detection and measurement of charged particles. If recombination occurs, it can lead to the loss of information about the particles' original trajectories and energies.

3. How is recombination prevented in a diffusion cloud chamber?

Recombination can be prevented by ensuring that the concentration of charged particles is kept low. This can be achieved by controlling factors such as the temperature, pressure, and electric field within the chamber. Additionally, using a mixture of gases can also help prevent recombination.

4. Are there any limitations to preventing recombination in a diffusion cloud chamber?

Yes, there are some limitations to preventing recombination in a diffusion cloud chamber. One limitation is that it is not always possible to completely eliminate recombination, especially in high-energy particle experiments. Additionally, the methods used to prevent recombination may also affect the sensitivity and resolution of the chamber.

5. What are some potential applications of a diffusion cloud chamber with prevented recombination?

A diffusion cloud chamber with prevented recombination has various applications in particle physics research. It can be used to study the properties of charged particles, such as their energy and mass, and to observe rare or short-lived particles that are difficult to detect using other methods. It can also be used in educational settings to demonstrate the behavior of charged particles under different conditions.

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