Build Electrodynamic Trap:Camera,Voltage,Distance

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SUMMARY

This discussion focuses on building an electrodynamic trap using two ring electrodes to capture aerosol particles, applying a voltage of 5 kV. The recommended distance between the electrodes should be at least 1.6 mm to prevent air breakdown, which occurs at approximately 30 kV/cm. The discussion emphasizes the importance of maintaining a safe spacing to avoid electrical sparks, particularly at sharp edges of the electrodes. Additionally, it references existing technologies such as Honeywell's electrostatic air purifiers for practical insights.

PREREQUISITES
  • Understanding of electrodynamics and electrostatic principles
  • Familiarity with high-voltage applications and safety measures
  • Knowledge of aerosol particle behavior and visualization techniques
  • Experience with camera selection for scientific imaging
NEXT STEPS
  • Research high-voltage safety protocols for experimental setups
  • Learn about different camera types suitable for particle visualization
  • Investigate the effects of humidity on electrical breakdown in air
  • Explore designs of existing electrodynamic traps and their applications
USEFUL FOR

This discussion is beneficial for physics enthusiasts, experimental physicists, and engineers interested in particle trapping technologies and high-voltage applications.

a789irfan
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I am new to physics. I am trying to build an electrodynamic trap using 2 ring electrodes to trap aerosol particles. I will be applying a voltage of 5 KV. What are the things that i need for example what camera do i use to visulaize the particles and what distance should i maintain between the rings
 
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Air breaks down at a field of about 30 kV/cm, modified a bit by humidity and significantly by the presence of larger particles. Since you don't want sparks, you want a spacing large compared to 5/30 cm or about 1.6 mm if you have smooth electrodes. The field increases dramatically at sharp edges, and more so at sharp points (the reason Franklin used sharpened rods to protect houses against lightning), so you might want to start with a cm or so.

This technology is common--take a look at Honeywell's electrostatic air purifier for home furnaces, or these links.

http://www.airpurifiers.com/technology/electronic.htm"
http://en.wikipedia.org/wiki/Electrostatic_air_cleaner"
 
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