Electrical and spectroscopic characterization of a surgical argon plasma discharge
Sandra Keller, Nikita Bibinov, Alexander Neugebauer, Peter Awakowicz
JOURNAL OF PHYSICS D-APPLIED PHYSICS, Volume: 46, Issue: 2, Article Number: 025402, DOI: 10.1088/0022-3727/46/2/025402, Published: JAN 16 2013
For electrosurgical procedures, the argon plasma coagulation (APC) discharge is a well-established atmospheric-pressure plasma tool for thermal haemostasis and devitalization of biological tissue. To characterize this plasma source, voltage-current measurements, microphotography, optical emission spectroscopy and numerical simulation are applied. Two discharge modes are established during the operation of the APC plasma source. A short transient spark discharge is ignited within the positive half period of the applied high voltage after a streamer channel connects the APC probe and the counter-electrode. During the second phase, which continues under negative high voltage, a glow discharge is stabilized in the plasma channel.