Can a Plasma Source Be Designed to Eliminate UV Radiation?

[leilat200]

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?

 

[phyzguy]

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.

 

[Dr Lots-o'watts]

Why don't you keep it behind glass?

 

[MATLABdude]

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"

 

[Dr Lots-o'watts]

That link is indeed quite intensive. Thanks MATLABdude.

Newport has similar information, in a more condensed format: http://www.newport.com/store/genContent.aspx/Optical-Materials/144943/1033"