Air-water microwave plasma torch as a NO source for biomedical applications

► Air-water atmospheric plasma torch (2.45 GHz) is investigated as a source of NO(X). ► Self-consistent model is applied to investigate the axial structure of the source. ► The maximum NO(X) density is observed at the higher power (400 W) applied. ► The NO(X) relative density in the afterglow plasma jet ranges between 1.1% and 1.6%. ► The microwave plasma source has a potential for successful use in plasma medicine.