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We present the issue raised by electron cyclotron resonance heating for the present development of fusion reactors. The possibility of realizing a free electron laser operating in the range 220-450 GHz is discussed also in view of heating in high magnetic field Tokamak.
The Free Electron Laser (FEL) is a very interesting device with many peculiar characteristics that makes it unique [1]. It is essentially based on the interaction between a free electron and a photon. It is well known that a single electron cannot emit or absorb a single photon in vacuum, due to the fact that energy and momentum conservation laws cannot be violated. But if we move our problem from...
We discuss non-conventional undulator configurations for SASE FEL devices aimed at enhancing the emission on higher harmonics, reducing the saturation length and operating in less sensitive conditions for the electron beam qualities.
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