Device for working a surface of a workpiece by means of a laser beam and method for operating the device

A device for cleaning a surface of a workpiece by means of a laser beam, comprising:

• a laser system comprising a laser source and optics, capable of producing a laser beam, and
• a plasma nozzle, configured for generating an atmospheric plasma beam, the plasma nozzle comprising a nozzle opening, out of which the plasma beam, generated in the plasma nozzle, emerges in operation,
• wherein the laser system and the plasma nozzle are arranged relative to one another and configured such that, in operation, the laser beam emerges out of the nozzle opening of the plasma nozzle together with the plasma beam,
• the plasma nozzle further comprising a tubular housing and, in operation, the laser beam runs through the tubular housing of the plasma nozzle,
• wherein the plasma nozzle further comprises an inner electrode and an inner channel, the inner electrode arranged inside the tubular housing, and in operation the laser beam runs through the inner channel to the nozzle opening, and
• wherein the laser system is configured to clean the surface and to continuously vary a beam direction of the laser beam such that the position of the laser beam in a cross-section of the nozzle opening changes continuously.