High-power laser-driven source of ultra-short X-ray and gamma-ray pulses
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A novel ultra-bright high-intensity source of X-ray and gamma radiation is suggested. It is based on the double Doppler effect, where a relativistic flying mirror reflects a counter-propagating electromagnetic radiation causing its frequency multiplication and intensification, and on the inverse double Doppler effect, where the mirror acquires energy from an ultra-intense co-propagating electromagnetic wave. The role of the flying mirror is played by a high-density thin plasma slab accelerating in the radiation pressure dominant regime. Frequencies of high harmonics generated at the flying mirror by a relativistically strong counter-propagating radiation udergo multiplication with the same factor as the fundamental frequency of the reflected radiation, approximately equal to the quadruple of the square of the mirror Lorentz factor.
PACS52.38.Ph X-ray, gamma-ray and particle generation 52.59.Ye Plasma devices for generation of coherent radiation 52.38.-r Laser-plasma interactions 52.35.Mw Nonlinear phenomena: waves, wave propagation, and other interactions
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