Device for producing a plasma, enabling microwave propagation and absorption zones to be dissociated having at least two parallel applicators defining a propogation zone and an exciter placed relative to the applicator

A distribution device for distributing microwave power to excite a plasma inside an enclosure, the device comprising:

• a source of microwave energy;
• at least one first applicator of microwave energy;
• and
• at least one wire-shaped plasma exciter placed at a distance from the first microwave applicator to define between them an absorption zone, electrons being accelerated by the microwave field along determined trajectories;
• wherein the distribution device includes at least one second applicator of microwave energy to co-operate with a first applicator and an exciter to form at least one excitation triplet in which firstly the first applicator and the second applicator are mounted substantially parallel to each other and are spaced apart by a given amount to define between them a propagation zone for microwave energy, and secondly the exciter is disposed inside the enclosure by being placed relative to the first and second applicators in such a manner that the trajectories of the electrons do not cross the propagation zone, thereby dissociating the propagation zone and the absorption zone.