Device and method for generating a plasma jet

A device for generating a plasma jet, comprising a first conduit, which comprises a first outlet, and a second conduit, which comprises at least one second outlet, wherein the first conduit is arranged inside the second conduit, such that a first flow channel is provided inside the first conduit, and a second flow channel is provided in the space between the first conduit and the second conduit, and wherein the device comprises a first electrode and a second electrode for generating an electric field in a feed gas flow provided in the first flow channel in order to generate a plasma jet from the feed gas flow, wherein the device is adapted to provide a curtain gas flow at the second outlet surrounding the plasma jet emerging from the first outlet, wherein the first electrode is positioned radially outside of the first flow channel,

• characterized in that
• the radial distance of the second electrode from a longitudinal axis of the first conduit is larger than the radial distance of the first electrode from said longitudinal axis,
• and that the maximum radial extension of the second conduit is 10 mm or less, particularly 4 mm or less.