Plasma Detection - CAE Users

Plasma Detection - CAE Users

Edge detection of high temperature plasmas Laurence Choi Sean Burke Plasmas are all over the place High temperature Often transient Major focus of energy research UW has 3 major fusion

expts. HSX MST Pegasus Short pulse periods Transient

instabilities Equilibrium Calculations Equilibria for stability, Te and Ne Fast (>1kHz) imaging required Mild distortion from lens Two measurments:

Qualitative Quantitative QuickTime and a Video decompressor are needed to see this picture. Qualitative Fast measurement Preconfigured mask

Recalibrate camera adjustments Integrate rows Find max I/x Qualitative Fiducial mark Define coords

CS is R = 0 Draw grid F-th inversion? Plasma Detection Main Problems Background (e.g.walls) Distinguishing

edges Methods used Sobel Operator Closing Region Filling Boundary Extraction Emphasize Edges Emphasize horizontal edges using Sobel

Operator: 1 2 1 0 0 0

-1 -2 -1 Filling in the Gaps Fill in the gaps using the closing operation: dilation followed by erosion: A B = (A B )B A = Sobel Edges of

Image 1 1 1 B= 1 1 1 1 1 1 Removing Background Noise Region Filling Shortcut: in every frame there are regions where we dont care about the fidelity: paint over in white/black.

Boundary Extraction Morphological Boundary operator used to determine the edges of the plasma. Note that small anomalies still exist.

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