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Metallic surfaces Metallic boundaries represented by colored rectangles Coil Anode Cathode External wall.

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Presentation on theme: "Metallic surfaces Metallic boundaries represented by colored rectangles Coil Anode Cathode External wall."— Presentation transcript:

1 Metallic surfaces Metallic boundaries represented by colored rectangles Coil Anode Cathode External wall

2 Simulation domain Simplest choice: free space between upper (orange) and lower (black) obstacles that determine plasma necks Upper neck Simulation domain Boundary Lower neck Coordinates: z = vertical distance from up- down symmetry plane r = radial from axis of symmetry

3 Boundary conditions Lateral boundary with zero density -Z < z < Z and r = R Lower circular boundary at z = -Z: n = 0 for Rneck < r < R i.e. outside the neck; Bessel inside the neck r < Rneck Upper circular boundary at z = Z: same as lower Equation: your (47), with large values of ba

4 Metallic boundaries Represented by colored rectangles Upper aperture Domain of simulation Lower aperture

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