Excitation by extreme temperaturesPlasma excitation process in the stars. 99% of the matter in the universe consists of plasma.
Very High Temperature
The process which is responsible for the biggest quantities of plasma in the universe:
The plasma of the stars.
99% of matter in the universe is plasma.
High-frequency excitationA plasma can also be excited by high-frequency electric fields. The higher the excitation frequency and the lower the gas pressure, the easier the excitation of the plasma, and the less energy is required. In low-pressure plasma technology, the plasma is excited by electromagnetic high-frequency fields. The following special feature is found here:
- In the evacuated plasma chamber (vacuum chamber), a plasma can be excited in almost any gaseous substance.
- The plasma excited by high frequency is cold
High Frequency Plasma Generation:
High frequency electric fields can generate a plasma as well.
The higher the frquency and the lower the gas pressure, the lower is the energy required for plasma generation. Therefore it is much easier to generate a plasma in low pressure conditions.
Specifics of low pressure plasma generated by High Frequency (HF)- electric fields:
- Almost any gaseous substance can be used for process gas
- Plasma generated by HF-fields is low temperature plasma
In industrial plasma technology official ISM-frequencies are used for generation:40 kHz, 13,56 MHz, 27,12 MHz, 3,45 GHz
Gas discharge is generated by strong electric fields caused by high voltage.
Plasma generated by gas discharge is found
- In flashes
- in gas-discharge lamps (neon tubes)
- in an electric arc:
- in an atmospheric plasma (PlasmaBeam)