The experimental research results for operation of the cold cathode magnetron injection gun in the linear traveling wave accelerator are described. The mechanism of the gun operation is connected with the current secondary electronic increase and the establishment of a self-supported secondary emission. The comparison of the beam passage conditions for a thermionic gun points on the fact, that the characteristics of the magnetron gun are acceptable for the purposes of injection in the rf accelerator.
The Secondary Emission Magnetron Injection Gun (SEMIG) is relatively a new cold-cathode electron gun [1]. The advantages of the SEMIG in long pulse operations are more obvious when we apply it for power radio-frequency sources and electron linacs. Experimental facility and a method of emission excitation in the SEMIG are described. The method consist of the secondary emission multiplication on the trailing edge of the voltage pulse. The SEMIG is operated with the extern pulsedriver. Similar method is known for magnetrons. The electron beam with pulse duration up to 3000 µs and repetition rate up to 50 Hz (duty factor up to 15%) is obtained.
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