Patent ID: 8169166

Claim:
Low-energy continuous linear electron accelerators with standing wave, including: low-energy electron source ( 10 ); accelerating structure ( 1 ) for accelerating of low-energy electrons; high-frequency power source ( 11 ) feeding the said accelerating structure ( 1 ); power supply ( 13 ) feeding the said electron source and power source; receiving antenna ( 14 ) located in one of accelerating units of the said structure ( 1 ) and adopted for acquisition of high-frequency signal for amplitude and phase monitoring of accelerating field; and, in the meantime, the said accelerating structure ( 1 ) includes successively arranged accelerating units ( 2 , 3 , 4 i ) adopted for formation of electromagnetic field under the source of high-frequency power ( 11 ), where each previous accelerating structure is connected to the following accelerating structure by coupling slots ( 7 ) through connection cells ( 5 , 6 i ), and in the said accelerating structure: first accelerating structure is implemented in the form of bunch resonator ( 2 ) adopted for direct communication with low-energy electrons source ( 10 ), second accelerating structure is implemented in the form of booster resonator ( 3 ) adopted for energy increase of incoming electrons up to the values providing their acceleration in the following part of accelerating structure ( 1 ), structures following after the second accelerating structure ( 4 i ) are adopted to increase the energy of entering electrons up to required value and, at least, for accelerating structures, to which non-relativistic electrons enter with kinetic energy less than rest energy, the lengths (L i ) between the centers of adjacent connection cells ( 5 , 6 i ) of accelerating structure ( 1 ) including the said accelerating unit ( 4 i ), are selected so that the length (L i ) of each following segment of the said accelerating structure ( 1 ) relates to that in the previous segment, as the average electron velocity in the previous segment to that in the following segment; the distance L g between the gap centers of bunch resonator ( 2 ) and booster resonator ( 3 ) is selected according to velocity ν 0 of electron stream at the input to bunch resonator ( 2 ) and microwave field wavelength λ of high-frequency power source in free space, based on the following relation: L g β 0 = 4 ⁢ n - 1 4 ⁢ λ , where β o =ν o /c, c is light velocity, n=1, 2, 3 . . . , and voltage U g at the gap of bunch resonator ( 2 ) is selected from relation U g U 0 ≈ 7.36 π ⁡ ( 4 ⁢ n - 1 ) , where U o is electron source voltage, n=1, 2, 3 . . . .