Record number :
1129896
Title of article :
Digital imaging and analysis of dusty plasmas Original Research Article
Author/Authors :
C.M. Boessé، نويسنده , , M.K. Henry، نويسنده , , T.W. Hyde، نويسنده , , L.S. Matthews، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2004
Pages :
5
From page :
2374
To page :
2378
Abstract :
Dust particles immersed within a plasma environment, such as those found in planetary rings or cometary environments, will acquire an electric charge. If the ratio of interparticle potential energy to average kinetic energy is high enough the particles will form either a ‘liquid’ structure with short-range ordering or a crystalline structure with long-range ordering. Since their discovery in laboratory environments in 1994, such crystals have been the subject of a variety of experimental, theoretical, and numerical investigations. Laboratory experiments analyzing the behavior of dust grains in a plasma rely on optical diagnostics to provide data about the system in a non-perturbative manner. In the past, capturing, imaging, and analyzing crystalline structure in dusty plasmas has been a non-trivial problem. Utilizing digital imaging and analysis systems, data capture, image formatting, and analysis can be done quickly. Following data capture, image analysis is conducted using modified Particle Image Velocimetry and Particle Tracking Velocimetry algorithms. The data extracted is then used to construct Voronoi diagrams, calculate particle density, inter-particle spacing, pair correlation functions, and thermal energy. From this data other dust plasma parameters can be inferred such as inter-particle forces and grain charges.
Keywords :
Digital imaging and analysis , Particle Image Velocimetry algorithm , Particle Tracking Velocimetry algorithm , Dusty plasmas
Journal title :
Advances in Space Research
Serial Year :
2004
Link To Document :
بازگشت