Abstract: The present invention relates to an electrode device (1, 2) for gas discharge sources and to a gas discharge source having one or two of said electrode devices (1, 2). With the proposed design of the cover (8), an efficient cooling of the electrode wheel (7) is achieved, allowing high electrical powers for operating gas discharge sources with such an electrode device.

Abstract: The present invention relates to an electrode device (1, 2) for gas discharge sources and to a gas discharge source having one or two of said electrode devices (1, 2). The electrode device (1, 2) comprises an electrode wheel (7) rotatable in a rotational direction around a rotational axis (22), said electrode wheel (7) having an outer circumferential surface (24) between two side surfaces (25). An electrode wheel cover (8) is provided which covers a portion of the outer circumferential surface (24) and the side surfaces (25) of the electrode wheel (24). The cover (8) is designed to form a cooling channel (12) in the circumferential direction between the cover (8), the outer circumferential surface (24) and radially outer portions part of the side surfaces (25), and to form a gap (23) between the cover (8) and the outer circumferential surface (24) in extension of the cooling channel (12) in the circumferential direction.