Electrostatic discharge without dielectric breakdown?

In summary, the conversation discusses an experiment with a van de graaf generator and a grounded wand, where sparks can be seen when the generator discharges to the wand. However, when a pointy metallic wand is brought near the generator's sphere, no sparks can be seen. The theory is that the discharge is going through the pointy wand, but it is a different style called coronal discharge.
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JenniferN
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I saw an experiment the other day, where a van de graaf generator charges up this big smooth chrome sphere. There is a "wand" with a much smaller sphere nearby that's grounded, and periodically a spark can be heard and seen when the big sphere dischrages to the wand, which corresponds to dielectric breakdown. What is intereresting is that when another pointy metalic wand (also ground) is brought near the van de graaf's big sphere, no more sparks anywhere can be seen anymore. So my theory is that the discharge is going through the pointy wand. But why isn't there a spark to discharge through the pointy wand? doesn't dielectric break down needs to happen to discharge through the pointy wand?
 
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Likes JenniferN and berkeman
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thanks davenn :)
 
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Related to Electrostatic discharge without dielectric breakdown?

1. What is electrostatic discharge without dielectric breakdown?

Electrostatic discharge without dielectric breakdown is a phenomenon where an electric charge is transferred between two objects without causing a breakdown in their insulating material. This can occur when two objects with different electric potentials come into contact or when there is a sudden change in the electric field surrounding an object.

2. What causes electrostatic discharge without dielectric breakdown?

Electrostatic discharge without dielectric breakdown is caused by a build-up of static electricity on the surface of an object. This can happen due to friction, induction, or contact with another charged object. When the electric charge becomes too high, it can jump to a nearby object through air or another non-conductive material, resulting in an electrostatic discharge without dielectric breakdown.

3. What are the effects of electrostatic discharge without dielectric breakdown?

The effects of electrostatic discharge without dielectric breakdown can range from minor nuisances, such as static shocks, to more serious consequences, such as damage to electronic components. In industrial settings, electrostatic discharge without dielectric breakdown can also cause fires or explosions in flammable environments.

4. How can electrostatic discharge without dielectric breakdown be prevented?

To prevent electrostatic discharge without dielectric breakdown, it is important to control the build-up of static electricity. This can be done by using antistatic materials, grounding objects, and using ionizers to neutralize charges. In addition, avoiding contact with sensitive electronic components and controlling humidity levels can also help prevent electrostatic discharge without dielectric breakdown.

5. What industries are most affected by electrostatic discharge without dielectric breakdown?

Industries that work with sensitive electronic equipment, such as electronics manufacturing, semiconductor production, and telecommunications, are most affected by electrostatic discharge without dielectric breakdown. However, any industry that deals with flammable materials, such as oil and gas, also needs to be aware of the potential hazards of electrostatic discharge without dielectric breakdown.

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