报告人：Masakatsu Murakami,  Institute of Laser Engineering, Osaka University

时间：  10:00-11:00, 2018-05-02

地点：  激光等离子体实验室三楼会议室

We propose a novel concept of bubble implosions. A bubble implosion combines micro-bubbles and ultraintense laser pulses to generate ultrahigh fields and relativistic protons. The bubble wall protons undergo volumetric acceleration toward the centre due to the spherically symmetric Coulomb force and the innermost protons accumulate at the centre with a density comparable to the interior of a white dwarf. Then an unprecedentedly high electric field is formed, which produces an energetic proton flash. Three-dimensional particle simulations confirm the robustness of Coulomb-imploded bubbles, which behave as nano-pulsars with repeated implosions and explosions to emit protons. Current technologies should be sufficient to experimentally verify concept of bubble implosions.