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In December 91, IBA signed an exclusivity agreement with the French Atomic
Agency (CEA, Commissariat a l'Energie. Atomique) to cooperate in the
development and industrialization of a new type of OW electron accelerator, called
the Rhodotron. The concept of acceleration for this machine was patented in 1989
and allowsthe production of a simple, compact and reliable EB accelerator.
The principle of operation of the Rhodotron has already been described in length
in previous articles (1,3,4,5). Briefly, the Rhodotron uses a system of bending
magnets to recirculate the electron beam through a single accelerating cavity.
With this system, it is possible to simultaneously produce high energy high
power continuous electron beams. This represents a significant technological
breakthrough, as it remains impossible to obtain this kind of specifications with the
existing technologies, namely the electrostatic accelerators and the linacs.
The feasibility of this new technology has been proven by the French researchers
who built a first laboratory prototype (2). In this machine, the beam is accelerated
up to 3,5 MeV, with a average power of 20 kW (beam intensity of 4 mA).