Publication at Faculty of Mathematics and Physics |
2013
Abstract
The dust grains were observed over a thousand discharges in the tokamak COMPASS. A novel method for semi-automatic extraction and tracking of dust grains using a relatively low frame-rate camera (370 fps) was proposed.
Radiation lifetime, time evolution and the acceleration of the dust grains were studied. The measured dust velocities roughly correspond to a simple model.
However, slow dust particles are signi ficantly a ffected by local plasma properties and initial release conditions that cannot be determined in our experiment.