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Radiation Emission of Fast Electrons in Collisions with “Ion‐Sphere” in Dense Plasmas |
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| Authors: | V A Astapenko F B Rosmej V S Lisitsa Xiangdong Li |
| Institution: | 1. Moscow Institute of Physics and Technology, Russian Federation;2. Sorbonne Universités, Pierre et Marie Curie, UMR 7605, case 128, 4 Place Jussieu, F‐75252 Paris Cedex 05, France;3. LULI, Ecole Polytechnique, CNRS, CEA, Physique Atomique dans les Plasmas Denses PAPD, Route de Saclay, F‐91128 Palaiseau Cedex, France;4. RSC “Kurchatov Institute”, Russian Federation;5. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, People's Republic of Chine |
| Abstract: | Radiative emission of fast electrons in collision with an “ion‐sphere” electron distribution in dense plasmas is under consideration. The electron structure of the ion sphere is calculated ab initio using self‐consistent solution of both bound and free electron distribution inside the sphere. Two radiation channels are included: emission of the colliding electron itself in static potential (conventional or static Bremsstrahlung) and the emission of “ion sphere” medium due to its polarization by the colliding electron (polarization Bremsstrahlung). The last one is calculated in the frame of local plasma density approximation. Interference between conventional and polarization Bremsstrahlung is taken into account. It is shown that spectral cross section of the process has characteristic features depending on plasma density and ionization stage of plasma ions. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
| Keywords: | Ion‐sphere model Bremsstrahlung Polarization Bremsstrahlung |