A dual-energy linac cargo inspection system

Zavadtsev, A.; Zavadtsev, D.; Krasnov, A.; Sobenin, N.; Kutsaev, S.; Churanov, D.; Urbant, M.
March 2011
Instruments & Experimental Techniques;Mar2011, Vol. 54 Issue 2, p241
Academic Journal
X-ray inspection systems for cargo containers, capable of performing Z analysis, are an actively evolving type of equipment for cargo inspections [1-3]. A linear electron accelerator with fast energy tuning, operating in the mode of interlacing low- and high-energy electron pulses, has been developed for use in such a system. The output electron energy in this accelerator can vary in the range of 3-15 MeV under software control. An X-ray radiographic image of a container is obtained in a monoenergetic mode with a beam energy of 9 MeV. Pulses with energies of 4 and 9 MeV are used to recognize materials inside a container (i.e., perform Z analysis). The standing-wave linear electron accelerator operates at a frequency of 2856 MHz, its pulse repetition frequency with different energies is 240 Hz, the pulse duration is 10 μs, and the beam energy in each pulse is >10 J.


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