Fractal modeling of vacuum arc cathode spots

PhD., Ausheva Nataliyaaana@svitonline.com

MSc., Demchyshyn Anatoliydemch@iptelecom.net.ua

Physical vapor depositionDecorative coatings Functional coatings

Ausheva N., Demchyshyn A.

Evaporation problemAusheva N., Demchyshyn A.

Fractal geometryAusheva N., Demchyshyn A.

Fractal nature of cathode spotsAusheva N., Demchyshyn A.

System flowchartAusheva N., Demchyshyn A.

Cathode spot walk modeling resultsAusheva N., Demchyshyn A.

Without magnetic field With tangent magnetic field

CPUAggregate stochastic fractal: • DLA u = 1• DBM u > 2,3…• Proposed method u = 1,2,3…

u – random walkers count

Iterations count > 500k

GPUAusheva N., Demchyshyn A.

Input discrete element fractal

Postprocessed fractal

Crater(arc aftermath)

GPU(simplified fragment shader)

Ausheva N., Demchyshyn A.

uniform sampler2D tiu_u;uniform sampler2D tiu2_u;

void main(){vec3 color; color = GaussianBlur(tiu_u, 3); color = color * Random(tiu2_u); gl_FragColor = vec4(color, 1.);}

Fractal structure analysisAusheva N., Demchyshyn A.

ResultsAusheva N., Demchyshyn A.

Thank youThe vacuum chamber was kindly provided byI.M. Frantsevich Institute of problems of material science,National Academy of Science of Ukraine, Kiev.