CONCEPTUAL DESIGN OF 10 MeV, 100 kW CW ELECTRON ACCELERATOR FOR INDUSTRIAL APPLICATION

The application fields of intense gamma-ray or X-ray for industrial purpose are expanding. Electron beam accelerator which can generate X-ray whose dose rate is equivalent to the effect of several MCi gamma-ray source is a major candidate as a intense X-ray source. 10 MeV, 100 kW CW electron accelerator Fantron-I is conceptually designed for X-ray source to irradiate food, corn, forest products and so on. Electrons are accelerated seventeen times through two coaxial cavities with TM010 mode by means of 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 location of each bending magnet are carefully adjusted to synchronize the beam with the accelerating field. In this paper, characteristics and overall conceptual design of the Fantron-I are presented.