Using a Mach–Zehnder interferometer to deduce nitrogen density mapping
Boudaoud F.†, Lemerini M.
       
Radial profile of neutral density in negative DC corona discharge for various pressures at position z = 3 mm, where z = 0 represent the plane, z = 6 mm represent the point, r = 0 corresponds to the axis discharge, and r = 25 mm corresponds to the diameter of the plane.