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2605893 
Journal Article 
Characterization of microwave plasma torch for decontamination 
Shimizu, T; Steffes, B; Pompl, R; Jamitzky, F; Bunk, W; Ramrath, K; Georgi, M; Stolz, W; Schmidt, HU; Urayama, T; Fujii, S; Morfill, GE 
2008 
1 
Plasma Processes and Polymers
ISSN: 1612-8850
EISSN: 1612-8869 
5 
6 
577-582 
WOS:000258912300009 
An atmospheric low-temperature microwave plasma torch has been developed and applied to disinfection. The size of the plasma output is relatively large (35 mm in diameter). Ar gas at a flow rate of 2.2 slm and 85 W microwave power are used. Plasma discharges are produced between the tip of each electrode and the inner surface of the cylinder. When an Escherichia coli culture is placed for 2 min at 20 mm below the torch, where the gas temperature is sufficiently cool, the bacteria are almost completely killed within a 40 mm diameter circle. The UV radiation is one of the major players responsible for killing bacteria, others being the reactive species and the charged particles. 
microwave discharges; non-thermal plasmas; plasma treatment; therapy of chronic foot ulcers