Erlangen 2018 – scientific programme
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P: Fachverband Plasmaphysik
P 21: Laser Plasmas - Poster
P 21.9: Poster
Wednesday, March 7, 2018, 16:15–18:15, Zelt West
Gamma-rays with orbital angular momentum via nonlinear Compton scattering — •Yue-Yue Chen1, Jian-Xing Li2, Karen Z. Hatsagortsyan3, and Christoph H. Keitel4 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2Xian Jiaotong University, Xian, China — 3Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 4Max-Planck-Institut für Kernphysik, Heidelberg, Germany
Gamma-rays with a large angular momentum are very attractive tools to control the rotation of nuclei and facilitate nuclear fission. We propose a scheme to generate well-collimated gamma-ray beams with orbital angular momentum by nonlinear Compton scattering of a strong laser pulse of twisted photons by ultra-relativistic electrons. Angular momentum conservation between absorbed laser photons, quantum radiation and electrons are numerically demonstrated in the quantum electrodynamic regime, which reveals that the angular momentum of the laser photons is not directly transferred to the emitted gamma-photons. The efficiency of the angular momentum transfer depends on laser and initial electron properties. We investigate the optimal parameter regime to enhance the orbital angular momentum of the gamma-beam.