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DC discharge dc.de_4

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Hi,

I am starting to use the plasma module and I am currently having a look at the DC discharge example (www.comsol.com/showroom/documentation/model/8640/).

During the model set up the value of the energy of the electron generated by secondary emission due to ion bombardment of the cathode is set to

dc.de_4-2*Wf

The 2*Wf term is clear, what is dc.de_4? I managed to understand that it is an energy loss and that there are also variables called dc.de_1 to dc.de_5 but how (and where) are these calculated? Physically dc.de_4 should be the energy gained by the ions falling through the cathode sheath by why are there 5 dc.de varaibles?
Does a nomenclature of all the comsol variables exists?

Thanks a lot

Michele


2 Replies Last Post 28.05.2013, 10:00 GMT-4
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Hello Michele Coletti

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Posted: 1 decade ago 24.03.2013, 21:44 GMT-4
hello,

did you get some answers to your dc.de_4 question?

i have the same question.

lukas
hello, did you get some answers to your dc.de_4 question? i have the same question. lukas

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Posted: 1 decade ago 28.05.2013, 10:00 GMT-4
dc.de_4 is to be seen in the equation view of the 4th reaction in the species list of plasma.
(or mwp.de_4 or probably also icp.de_4)

it is set to 15.8 in the 2d-DCplasma-column in the library. (Ar ionisation)

so it is fixed? and is not the incident energy of the species on the surface?

lukas
dc.de_4 is to be seen in the equation view of the 4th reaction in the species list of plasma. (or mwp.de_4 or probably also icp.de_4) it is set to 15.8 in the 2d-DCplasma-column in the library. (Ar ionisation) so it is fixed? and is not the incident energy of the species on the surface? lukas

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