AVS 52nd International Symposium
    Plasma Science and Technology Wednesday Sessions
       Session PS-WeA

Paper PS-WeA3
Cold Atmospheric Plasma in Nitrogen and Air Generated by the Hybrid Plasma Source

Wednesday, November 2, 2005, 2:40 pm, Room 302

Session: Atmospheric Plasmas and Microdischarges
Presenter: H. Barankova, Uppsala University, Sweden
Authors: H. Barankova, Uppsala University, Sweden
L. Bardos, Uppsala University, Sweden
D. Söderström, Uppsala University, Sweden
Correspondent: Click to Email
Generation of long plumes of cold atmospheric plasma in nitrogen and air has been successfully performed by the Hybrid Hollow Electrode Activated Discharge (H-HEAD) source. The source with a simple cylindrical electrode terminated by a gas nozzle combines the microwave antenna plasma with the hollow cathode plasma generated inside the gas nozzle by pulsed DC power. The H-HEAD source is capable to generate up to 10 cm long plumes in air at the microwave power below 500 W and at air flow rate as low as 100 sccm. Corresponding flow rates in nitrogen plasma are even less than 80 sccm. The discharges in air and nitrogen have similar shapes and are comparable with corresponding plasma columns in argon. Comparison of optical emission spectra of the plasma in nitrogen and air are presented. Temperatures generated on steel substrates by interaction with nitrogen and air plasma columns at different microwave and DC powers are compared with corresponding effects in argon plasma.