Preliminary 2D modelling of a gas discharge plasma.

Tirozzi B., Buratti P., Alladio F., Micozzi P.

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We study the properties of a plasma appearing as a linear discharge with variable diameter for a length of about $1$ m which takes the shape of a mushroom in front of two annulars. A simplified 2D description is explored neglecting neutrals dynamics which is relevant in a narrow edge layer where the gas is fully ionized. The equatorial section $S_1$ has a radius of about $R_{1} =0.25$ m, while the narrow sections $S_2$ at the end of the linear region have both $R_{2} =0.065$ m. We compute the pressure and temperature distribution of the plasma flows.

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