Apparatus for generating a plasma, comprising - at least one first electrode, - at least one second electrode located at a distance from the first electrode, - a voltage source which is connected in such a manner to at least one electrode (3, 5), selected from the first electrode and the second electrode, that a potential difference between the at least one first electrode and the at least one second electrode can be produced by the voltage source, wherein - the voltage source is configured as a DC voltage source, wherein - the at least one first electrode and the at least one second electrode define at least one discharge path for an electrical discharge in a discharge region between the at least one first electrode and the at least one second electrode, having - a magnetic field device adapted and located relative to the at least one first electrode and the at least one second electrode to provide a magnetic field in the discharge region such that - a magnetic field vector of the magnetic field is oriented at an angle to the discharge path, and comprising - a conduit portion in fluid communication with the discharge region so that a fluid can be conveyed along the conduit portion through the discharge region, wherein the apparatus is adapted, - to convey the fluid along the conduit portion through the discharge region, and - for generating a non-thermal plasma, wherein - at least one discharge filament is generated along the discharge path in the discharge region between the at least two electrodes (3, 5), wherein - the discharge filament is driven by the magnetic field to a propagating motion in the discharge region, - wherein, in operation of the apparatus, the fluid is conveyed through the discharge region, and characterized in that - the apparatus is configured such that, in operation of the apparatus, the propagating motion of the discharge filament and a flow rate of the fluid through the discharge region are adjusted to each other such that each volume element of the fluid flowing through the discharge region, which moves in a direction perpendicular to the discharge path through the discharge region and has a thickness, measured in the direction perpendicular to the discharge path, corresponding to a thickness of the discharge filament, is overrun at least once by the discharge filament. - at least one first electrode, - at least one second electrode located at a distance from the first electrode, - a voltage source which is connected in such a manner to at least one electrode (3, 5), selected from the first electrode and the second electrode, that a potential difference between the at least one first electrode and the at least one second electrode can be produced by the voltage source, wherein - the voltage source is configured as a DC voltage source, wherein - the at least one first electrode and the at least one second electrode define at least one discharge path for an electrical discharge in a discharge region between the at least one first electrode and the at least one second electrode, having - a magnetic field device adapted and located relative to the at least one first electrode and the at least one second electrode to provide a magnetic field in the discharge region such that - a magnetic field vector of the magnetic field is oriented at an angle to the discharge path, and comprising - a conduit portion in fluid communication with the discharge region so that a fluid can be conveyed along the conduit portion through the discharge region, wherein the apparatus is adapted, - to convey the fluid along the conduit portion through the discharge region, and - for generating a non-thermal plasma, wherein - at least one discharge filament is generated along the discharge path in the discharge region between the at least two electrodes (3, 5), wherein - the discharge filament is driven by the magnetic field to a propagating motion in the discharge region, - wherein, in operation of the apparatus, the fluid is conveyed through the discharge region, and characterized in that - the apparatus is configured such that, in operation of the apparatus, the propagating motion of the discharge filament and a flow rate of the fluid through the discharge region are adjusted to each other such that each volume element of the fluid flowing through the discharge region, which moves in a direction perpendicular to the discharge path through the discharge region and has a thickness, measured in the direction perpendicular to the discharge path, corresponding to a thickness of the discharge filament, is overrun at least once by the discharge filament.