Visualizations with high speed framing camera of the evolutive phases related to the development of a microplasma in ionic solution

Páginas: 7

Idioma: Ingles

Notas:

AS INGPEED

Research and development in Mechanical Engineering

Blumenau-SC, Bazil

---

---

Resumo

This technical article presents experimental results of qualitative analyses by photos with high speed framing camera of the evolutive phases related to the development of a microplasma in form of an electric discharge generated in ionic solution with a controlled electrical conductivity. These analyses became possible by the construction of an experimental device consisted of an electric voltage pulse generator electrically connected with the high speed framing camera and with two electrodes positioned in a micrometric distance from each other forming an electrochemical cell. The application of an electric voltage pulse between the electrodes in a predefined time in microseconds and under special experimental conditions using the generator triggers in the same time the high speed framing camera. This camera makes it possible to obtain extremely rapid various photos of the chemical and physical phenomena occurring between the electrodes. Through the obtained photos it can be verified that the development of a microplasma in ionic solution is firstly the direct result of the formation of a volumetric quantity of gas within the space between the electrodes. The intensity of the electric voltage pulse applied at the electrodes conduces to the “rupture” of the dielectric properties of this gas, thus producing a microplasma with special physical characteristics. It is also explained that the gas formed between the electrodes is hydrogen resulting from the electrochemical reactions developed in the ionic solution after the application of the electric voltage pulse between the electrodes.

Keywords: ionic solution, microplasma, high speed framing camera, electric discharge, pulse generator.

Visualizar arquivo PDF Enviar e-mail para o autor

Comentários