The electron-neutral collision cross section o for 1-eV electrons in H can be approximated by a...

 

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The electron-neutral collision cross section o for 1-eV electrons in H can be approximated by a where ao = 0.53x10-8cm is the radius of the first Bohr orbit of the hydrogen atom. A plasma column with no magnetic field has p = 10-³ Torr of hydrogen at room temperature (20°C) and Te = 1 eV. (a) Compute the electron diffusion coefficient in m²/s, assuming that ou averaged over the velocity distribution is equal to ou for 1-eV electrons. (b) If the current density along the column is 1kA/m² and the plasma density is 10¹7 m-3, what is the electric field along the column? The electron-neutral collision cross section o for 1-eV electrons in H can be approximated by a where ao = 0.53x10-8cm is the radius of the first Bohr orbit of the hydrogen atom. A plasma column with no magnetic field has p = 10-³ Torr of hydrogen at room temperature (20°C) and Te = 1 eV. (a) Compute the electron diffusion coefficient in m²/s, assuming that ou averaged over the velocity distribution is equal to ou for 1-eV electrons. (b) If the current density along the column is 1kA/m² and the plasma density is 10¹7 m-3, what is the electric field along the column?

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a The electron diffusion coefficient can be computed using the formula D vavg where is the collision crosssection vavg is the average velocity of the ... View the full answer