期刊4MeV High-voltage accelerator with 500kW electron beam for radiation sterilization.pdfVIP

Vacuum 62 (2001) 225}231 4 MeV High-voltage accelerator with 500 kW electron beam for radiation sterilization A.S. Ivanov , V.P. Ovchinnikov , M.P. Svinin , N.G. Tolstun *, S.L. Bogart Efremov Research Institute of Electrophysical Apparatus, Metallostroy, Sovetsky Pr.1, 189631 Saint-Petersburg, Russia EASI, Carlsbad, CA, USA Received 27 June 2000; received in revised form 20 December 2000 Abstract Growing interest in X-ray radiation at an industrial scale for various kinds of processes has stimulated a requirement for high-e$ciency and low-cost X-ray production. At powers greater than 100 kW, high-voltage electron accelerators based on the transformer}rectier principle have the highest e$ciency of conversion of electric power to an accelerated electron beam (not less than 80%), which makes them quite attractive for industrial applications. Some preliminary results of the design of a 4 MeV, 500 kW accelerator are presented in this paper. The accelerator can be used in the electron beam mode, or as an X-ray source, or it can be run in a mixed mode where part of electron beam is directed at the object to be irradiated near the surface and the other part is converted to X-rays for deeper penetration. Using several di!erent types of magnetic-eld beam-forming systems which include scanning, the accelerator can be adapted for practically any form of material and product irradiation with high e$ciency. Versions of installations for irradiation of cylindrical objects (logs, pipes) and box-shaped components (packed food, for example) are given in the paper. 20