The purpose of "Operation Corona" was to confuse the German nightfighters during the raids on German cities during WWII. It was first used during the attack on the German industrial center of Kassel on the night of October 22/23 1943 in which 90% of the city fell to ashes, leaving 10,000 dead and 150,000 homeless. During the first years of war many people, mostly Jews, fled Nazi-Germany to England. These people were very valuable to RAF Bomber Command, since they natively spoke any German accent. These people were capable of countermanding the orders given from the senior officers in the Air Defence headquarters, and so redirect the nightfighters to other targets or give them orders to land immediately at an airbase.
The corona generating device of claim 2, wherein said element comprises a conductive shield which substantially surrounds said corona discharge electrode and has a longitudinal opening therein to permit ions emitted from the electrode to be directed toward the surface to be charged.
The corona generating device of claim 7, wherein said corona discharge electrode comprises a thin wire coated at least in the discharge area with a dielectric material, and said conductive shield has means associated therewith to connect to a potential source.
In the conventional corona discharge device, the conductive corona electrode is also in the form of an elongated wire connected to a corona generating power supply and supported by end blocks with the wire being partially surrounded by a conductive shield which is usually electrically grounded.
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