| 摘要 |
A device, preferably a module, for use in a glow discharge apparatus, comprises an insulating body 1 which is surrounded by a plurality of elements, one of which elements 3 is electrically conductive and, in use, functions as an anode element, a second of which elements 2 is electrically conductive, is spaced apart from said one element 3 and, in use, functions as a cathode element, and at least a third of which elements 4 is electrically conductive and is disposed intermediate the said one element 3 and the said second element 2. The electrically conductive elements 2, 3, 4 are spaced apart from one another so that their adjacent surface portions define passages 5 communicating with the exterior of the device which passages 5 are of substantially uniform width along their length. The device protects the insulating body 1 from contamination when it is in the vicinity of a glow discharge. <IMAGE> |
