Mass spectrometry of a plasma needle with an external grounded copper ring

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

Plasma needle is 13.56MHz RF discharge that operates in a mixture of ambient air and helium. This type of plasma source is used in treatment of plant tissue, microsurgery, disinfection of dental cavities and wounds. In this paper we used the configuration with an additional, grounded copper ring placed near the tip of the needle. Larger volume of plasma and lower plasma ignition powers are provided by adding the ring. Hiden HPR60 mass analyzer was used to obtain the mass spectra and determine the yields of N,O and NO radicals in the plasma.

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