Fractal modeling of vacuum arc cathode spots Ph

Fractal modeling of vacuum arc cathode spots Ph. D. , Ausheva Nataliya aana@svitonline. com MSc. , Demchyshyn Anatoliy demch@iptelecom. net. ua

Ausheva N. , Demchyshyn A. Physical vapor deposition Decorative coatings Functional coatings

Ausheva N. , Demchyshyn A. Evaporation problem

Ausheva N. , Demchyshyn A. Fractal geometry

Ausheva N. , Demchyshyn A. Fractal nature of cathode spots

Ausheva N. , Demchyshyn A. System flowchart

Ausheva N. , Demchyshyn A. Cathode spot walk modeling results Without magnetic field With tangent magnetic field

CPU Aggregate stochastic fractal: u – random walkers count • DLA u = 1 • DBM u > 2, 3… • Proposed method u = 1, 2, 3… Iterations count > 500 k

Ausheva N. , Demchyshyn A. GPU Crater (arc aftermath) Postprocessed fractal Input discrete element fractal

Ausheva N. , Demchyshyn A. GPU (simplified fragment shader) uniform sampler 2 D tiu_u; uniform sampler 2 D tiu 2_u; void main() { vec 3 color; color = Gaussian. Blur(tiu_u, 3); color = color * Random(tiu 2_u); gl_Frag. Color = vec 4(color, 1. ); }

Ausheva N. , Demchyshyn A. Fractal structure analysis

Ausheva N. , Demchyshyn A. Results

Thank you The vacuum chamber was kindly provided by I. M. Frantsevich Institute of problems of material science, National Academy of Science of Ukraine, Kiev.