Can a Plasma Source Be Designed to Eliminate UV Radiation?

In summary: In summary, it is not possible to design a plasma source that does not emit UV radiation due to the nature of Coulomb collisions between electrons and ions. The best way to reduce UV emissions is to have a cooler and less dense plasma. Alternatively, using glasses that are opaque to UV light can also help in controlling UV emissions from plasma sources. Companies like Melles-Griot and Newport provide detailed information on the transmission spectra of various materials, which can be useful in selecting appropriate glass materials for plasma deposition systems.
  • #1
leilat200
1
0
I want to keep all the species and radiation from plasma but not UV. Is there a way to design plasma source in a way that there will be no UV coming out?
 
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  • #2
I don't see how. Any time you have a plasma you have Coulomb collisions between the electrons and ions. This leads to bremsstrahlung, which contains UV. The cooler and less dense the plasma, the less the radiation, but it is always there.
 
  • #3
Why don't you keep it behind glass?
 
  • #4
Dr Lots-o'watts said:
Why don't you keep it behind glass?

To expand on what Doc Watts says, most glasses are only transparent at optical frequencies, and are opaque in the UV (i.e. they block out UV light). Quite handy for view ports on plasma deposition systems (unless they're actually made out of quartz and you're getting yourself a sun tan in the lab).

Melles-Griot has transmission spectra (and other information) for a wide range of materials in the Material Properties Chapter of their excellent Laser Optics primer / text on their website:
http://www.cvimellesgriot.com/Company/CoolTips.aspx

Direct link to the http://www.cvimellesgriot.com/Products/Documents/TechnicalGuide/Material-Properties.pdf"
 
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Related to Can a Plasma Source Be Designed to Eliminate UV Radiation?

1. What is a plasma source without UV?

A plasma source without UV is a device that produces plasma, which is a state of matter where gas molecules are ionized and excited to produce highly reactive species, without the use of ultraviolet (UV) light.

2. How does a plasma source without UV work?

A plasma source without UV typically uses an electric field to ionize and excite gas molecules. The electric field can be created using various methods such as radio frequency (RF) power or direct current (DC) discharge. The ionized gas molecules then collide with each other, producing plasma.

3. What are the advantages of using a plasma source without UV?

One advantage of using a plasma source without UV is that it can produce reactive species without the potential hazards associated with UV light. Additionally, it can be used with a wider range of materials and processes, as UV light can be damaging to some materials. Furthermore, a plasma source without UV can be more energy efficient compared to UV-based sources.

4. What are some applications of a plasma source without UV?

A plasma source without UV has various applications in fields such as materials science, surface treatment, and biomedical research. It can be used for plasma etching, surface modification, and sterilization, among others.

5. Are there any limitations to using a plasma source without UV?

One limitation of using a plasma source without UV is that it may not be suitable for processes that require the use of UV light, such as certain types of photochemical reactions. Additionally, the production of reactive species may be limited compared to UV-based sources. However, advancements in technology are constantly improving the capabilities of plasma sources without UV.

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