The Flying mirror; Future brightest X-ray and -ray source

飛翔鏡; 高輝度X線及び線源

Esirkepov, T. Z.; Bulanov, S. V.; 神門 正城; Pirozhkov, A. S.; Zhidkov, A. G.*

Esirkepov, T. Z.; Bulanov, S. V.; Kando, Masaki; Pirozhkov, A. S.; Zhidkov, A. G.*

An ultra-bright high-power X-ray and -ray source is proposed. A relativistic flying mirror reflects a counter-propagating electromagnetic radiation causing its frequency multiplication and intensification, while the role of the mirror is played by a solid-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 undergo 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. The theory of the reflectivity of a moving thin plasma slab is presented.