Visualization of Lithium and Tungsten
Particles in NSTX
Lithium and tungsten particles are dropped along the edge of the plasma
in NSTX. The position of the particles over time is shown by the
trail attached to each particle. The tungsten particles have a
red trail and move closer to the separatrix. The lithium
particles have a blue trail and move faster. More details of the
behavior are in the paper:
3-D Reconstruction of Pre-Characterized
Lithium and Tungsten Dust Particle Trajectories in NSTX.
The renderings show the NSTX plates and center stack with the
plasma. The particles are released from the dropper flight tube
in the upper left. Two cameras in the back capture images of the
particles' location throughout the shot. The image data is used
to generate the 3-D coordinates of the particles.
Dan Abolafia developed the 3-D model and software for importing the
data into Visit for rendering the visualizations.