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Basic principle of plasma stealth technology
Because the technology of independent plasma generator is relatively simple, its research results are also the most obvious. According to public reports, the Russian Kai'erdishi Research Center has developed two generations of plasma stealth products, and its practicability has been confirmed by ground simulation tests and aircraft tests. Its second generation product is an independent plasma generator, weighing less than 100 kg, and the working medium in the generator is corona discharge gas. Russia's public description of the product is that it can not only weaken the radar reflection signal, but also send some false signals to the enemy radar, making it difficult for the enemy to correctly judge the target position and speed. According to recent reports, it will become the first Russian combat aircraft using plasma stealth. But the shape design of the machine, such as the edge of the nose, also has invisible considerations. Besides. The United States also believes that Russia has adopted this technology on some air-launched cruise missiles.

At present, this kind of product is called its first generation plasma stealth product, that is, the plasma generating sheet published by Russian Kai'erdishi Research Center. The thickness of this generator is 500 ~ 700 microns, and the voltage is several thousand volts (the current is several hundred microamperes). It is attached to the strong scattering part of the aircraft, which ionizes the surrounding air to form a plasma layer and realizes invisibility. The product can also be exported, but its technical details are not disclosed in detail. In addition, in 2000, an article in Air France magazine described the electro-pneumatic characteristics of Northrop Grumman's B-2A "Ghost" strategic bomber. It is believed that B-2A also adopts this plasma stealth technology. It is reported that the potential difference between the leading edge of the B-2A flying wing and the tail nozzle is as high as1.5mV, thus ionizing the surrounding air and making the whole aircraft invisible in the plasma coating. If B-2A does adopt this stealth technology, the most noteworthy thing is how to maintain the uniformity of plasma layer and how to make its electronic equipment work normally. Atmospheric pressure partial discharge method can be realized not only by installing electrodes on the aircraft as mentioned above, but also by coating radioactive coating on the surface of the aircraft to produce plasma layer. Its principle is to bombard air molecules with the radiation of radioactive elements to ionize them and form a plasma layer with sufficient density and thickness. The advantage of this method is that it is easy to realize the plasma layer with high density and uniform distribution, and it is easy to realize and control. The United States put forward this principle in the 1970s, and it reached the climax of research in the early 1990s. However, there is no report on the actual test and use of aircraft. Russian research focuses on independent plasma generators from public reports. Since the late 1990s, the number of papers on plasma stealth technology published in American public journals has far exceeded that of other countries, including Russia.