Conceptual design of 10 MeV, 100 kW CW electron accelerator for industrial application

The application fields of intense gamma-rays or X-rays for industrial purposes are expanding. An electron beam accelerator which can generate X-rays whose dose rate is equivalent to the effect of a several MCi gamma-ray source is a major candidate as an intense X-ray source. The 10 MeV, 100 kW CW electron accelerator Fantron-I is conceptually designed for an X-ray source to irradiate food, corn, forest products and so on. Electrons are accelerated seventeen times through two coaxial cavities with a TM010 mode by means of a bending magnet located outside the cavity. The resonant frequency of the cavity is about 160 MHz and the phase of one cavity is 180° shifted from that of the other. Higher order modes (HOM) which may cause beam instability are analyzed. The design parameters of beam lines and bending magnets are determined from the results of beam phase analysis, especially magnetic flux density and locations of each bending magnet are carefully adjusted to synchronize the beam with the accelerating field. In this paper, characteristics and the overall conceptual design of the Fantron-I are presented