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7Complex Systems of Charged Particles and their Interactions with Electromagnetic Radiation 2016
ELECTRON ACCELERATION BY LASER PULSE UNDER ITS OUTPUT ON OPTICAL SURFACE SECTION "VACUUM-TRANSPARENT MEDIUM".
LASER SYNCROTRON
M.Yu.Romanovsky Federal Agency for Scientific Organization, e-mail: romanovsky@fano.gov.ru
The dynamics of relativistic electron in field of electromagnetic wave arising on the optical surface section among vacuum and transparent medium under a total internal reflection is studied [1]. The phase velocity of this wave may be varied from c/n (c is the speed of light in vacuum, n is the refractive index of transparent medium) up to infinity. There appear areas with positive and negative values of fields with a length are approximately equal to half wavelength of initial laser radiation. These phases may propagate with velocities closed to c.
One considers the s-polarization of this electromagnetic wave. Relativistic electrons propagating along the direction of this wave acquire the transversal acceleration. It is demonstrated that the total electron energy gain may be up to tens MeV depending on the length of acceleration mostly for laser electric field limited by transparent medium beam strength. An application of permanent magnetic field normal to the section surface with magnitudes not less than several percent from the amplitude of above electric wave strongly increase the acceleration. All restriction processes are considered (unlike [2]).
Above energy gain, electrons change the propagation direction under each act of acceleration and emit radiation. Several acts of acceleration may change this direction on 360 degrees. The continuation of the process may be considered as laser synchrotron. The diameter of synchrotron ring in range of 1 m provide the equilibrium between acceleration and radiation losses for maximum synchrotron radiation frequency ~ 1021 s-1 corresponding to emitted quanta energy ~ 1MeV.
References
[1] Romanovsky M.Yu., Quantum Electronics, 2016, 46 [in press].
[2] Amatuni A.Ts. et al., Physics of Elementary Particles and Atomic Nuclei, 1989, 20, 1246 [in Russian]
