Generation of electron ? positron pairs by laser-ion implosion of a target with a spherical microbubble inside
Generation of electron ? positron pairs by laser-ion implosion of a target with a spherical microbubble inside
复制标题
电子的产生 ?
DOI：
10.1070/qel17611
复制
发表时间：
2021
影响因子：
0.9
通讯作者：
Murakami M.
中科院分区：
文献类型：
--
作者：
Serebryakov D.A.;Kostyukov I.Yu.;Murakami M.
具有微泡的激光靶最近得到了深入的研究，包括以产生超强电磁场为目的。在激光辐射的作用下，离子束在靶中形成，会聚到微泡的中心。在中心区域，离子密度可以比目标密度高几倍，导致产生极强的电场和高能离子。利用PIC模拟，考虑到量子电动力学（QED）的影响和强场区QED级联的发展，研究了靶电子的动力学。结果表明，电子温度的增加导致更有效地形成电子-正电子对。分析了韧致辐射对微泡中心区域光子产生的贡献。结果表明，与离子集体场中电子发射的同步辐射机制相比，韧致辐射的贡献是微不足道的。
Laser targets with microbubbless have recently been intensely studied, including with the aim of generating superintense electromagnetic fields. Under the action of laser radiation, ion beams are formed in the target, converging to the centre of the microbubbles. In the central region, the ion density can be several times higher than the target density, leading to the generation of an extremely intense electric field and high-energy ions. Using PIC simulation, the dynamics of target electrons is investigated taking into account the effects of quantum electrodynamics (QED) and the development of a QED cascade in the intense field region. It is shown that an increase in the electron temperature leads to a much more efficient formation of electron–positron pairs. The contribution of bremsstrahlung to the generation of photons in the central region of the microbubbles is analysed. It is found that the contribution of bremsstrahlung is insignificant in comparison with the synchrotron mechanism of electron emission in the collective field of ions.