What is the kinetic energy of particles in plasma

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Discussion Overview

The discussion revolves around the kinetic energy of particles in plasma, specifically in the context of transforming argon gas into plasma using electricity. Participants explore the necessary conditions, including voltage and pressure, for achieving this transformation, as well as the implications for particle energy in the resulting plasma.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant inquires about the average kinetic energy of argon particles in plasma when subjected to a 30-volt electric current.
  • Another participant corrects the initial claim, stating that 30 volts is a potential difference and not a current, and emphasizes that a minimum arc voltage of 137 V is required for argon.
  • It is noted that the energy of particles in plasma can depend on the distance from the arc and that creating a gap for plasma formation is challenging.
  • A participant mentions that a voltage of 30 volts can accelerate singly charged ions to provide kinetic energy of 30 eV.
  • Several participants express a desire for guidance on how to create plasma from argon gas and the necessary electrical conditions for doing so.
  • Questions are raised about the feasibility of converting argon gas at 10,000 psi into plasma and whether plasma can exist at high pressures, with some suggesting that it can but only at extreme temperatures.
  • Concerns are voiced regarding the practicality of achieving plasma at high pressures and the implications for container integrity.
  • One participant reflects on their understanding of plasma limitations concerning gas pressure and voltage after receiving clarification from others.

Areas of Agreement / Disagreement

Participants express differing views on the conditions necessary for creating plasma from argon gas, particularly regarding voltage requirements and the effects of pressure. There is no consensus on the specific methods or feasibility of achieving plasma at high pressures.

Contextual Notes

Participants discuss the challenges of creating plasma, including the need for specific voltage levels and the implications of pressure on plasma formation. The conversation highlights the complexity of the topic and the various factors that influence plasma generation.

ahmed11
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if i connect an electric current of 30 volts to argon gas to transform it to plasma, what is the average kinetic energy of the argon particles in that plasma?
 
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30 volt is a potential difference, not an electric current. If you just have two electrodes with 30 volts difference in an argon gas, nothing will happen (unless the electrodes are extremely close together).
 
Current is not measured in volts.

30 volts is not enough.
[PLAIN]https://en.wikipedia.org/wiki/Paschen's_law said:
For[/PLAIN] argon, the minimum arc voltage is 137 V at a larger 12 µm.

Creating a gap of only 12 µm is not easy. You also need a vacuum.

The energy of the particles in the plasma depends on the distance from the arc. Energy considerations are also discussed in https://en.wikipedia.org/wiki/Paschen's_law

You could do a much better job in phrasing your question. The usefulness of answers here is proportional to the quality of the question.
 
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Some basic physics... A voltage of 30volts will accelerate singly charged ions to provide kinetic energy of 30eV (about 50 x 10-19) joules
 
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anorlunda said:
Current is not measured in volts.

30 volts is not enough.Creating a gap of only 12 µm is not easy. You also need a vacuum.

The energy of the particles in the plasma depends on the distance from the arc. Energy considerations are also discussed in https://en.wikipedia.org/wiki/Paschen's_law

You could do a much better job in phrasing your question. The usefulness of answers here is proportional to the quality of the question.
then how to make plasma with argon gas, i saw a couple of videos on the internet. could you please explain to me how this happens and how to do it?
 
i just want to know how to transform argon gas to plasma with electricity and calculate the average kinetic energy of that plasma?
 
and also can a container of argon gas at 10,000 psi be converted to plasma with electricity or plasma can't exist at high pressure? assuming the container can hold it and how much electricity should be applied to convert that much argon to plasma if possible?
 
In general: a higher voltage can work.
ahmed11 said:
and also can a container of argon gas at 10,000 psi be converted to plasma with electricity or plasma can't exist at high pressure? assuming the container can hold it and how much electricity should be applied to convert that much argon to plasma if possible?
It can exist, but only at completely unreasonable temperatures (evaporating the container walls).

Don't ask x-y questions please.
What do you actually want to do? Why do you want a high-pressure argon plasma?
 
mfb said:
In general: a higher voltage can work.
It can exist, but only at completely unreasonable temperatures (evaporating the container walls).

Don't ask x-y questions please.
What do you actually want to do? Why do you want a high-pressure argon plasma?
i just couldn't understand why only plasmas exist in low pressure gases and why can't they be applied to a higher situation, i thought that plasma have limitation with pressure of the gas and the voltage passing through it but thanks to you i get it now
 

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