Operating stability diagram for the plasma needle used asdeactivation agent for E. Coli bacteria

摘要

This paper presents the operating stability diagram for an atmospheric pressure non-thermal Heplasma, known as the plasma needle with the aim of establishing optimum working parameters forbacterial deactivation applications. The data necessary for plotting such a diagram were obtainedby performing visual observations on the plasma ignition, formation and aspect as function of gasflow-rate at different RF plasma powers. The diagram indicates that there are three differentshapes for the plasma: point like, ball shape and ellipsoidal shape. The plasma temperature wasdetermined via thermocouple method for different distances. Escherichia coli cultures weredeactivated successfully, results function of treatment time or gas flow-rate are presented.