Horný V, Bleotu P G, Ursescu D, Malka V, Tomassini P
<a href="https://ror.org/048m5jb39">Extreme Light Infrastructure - Nuclear Physics</a>, Strada Reactorului 30, RO-077125 Magurele, Romania.
Department of Physics of Complex Systems, <a href="https://ror.org/0316ej306">Weizmann Institute of Science</a>, Rehovot 7610001, Israel.
Phys Rev E. 2024 Sep;110(3-2):035202. doi: 10.1103/PhysRevE.110.035202.
With the usage of the postcompression technique, few-cycle joule-class laser pulses are nowadays available extending the state of the art of 100 TW-class laser working at 10 Hz repetition. In this Letter, we explore the potential of wakefield acceleration when driven with such pulses. The numerical modeling predicts that 50% of the laser pulse energy can be transferred into electrons with energy above 15 MeV, and with charge exceeding several nanocoulombs for the electrons at hundreds of MeV energy. In such a regime, the laser pulse depletes its energy to plasma rapidly driving a strong cavitated wakefield. The self-steepening effect induces a continuous prolongation of a bubble resulting in a massive continuous self-injection that explains the extremely high charge of the beam rending this approach suitable for promoting Bremsstrahlung emitter and generator of tertiary particles, including neutrons released through photonuclear reactions.
随着后压缩技术的应用，如今已能获得少周期焦耳级激光脉冲，这拓展了重复频率为10赫兹的100太瓦级激光的技术水平。在本信函中，我们探究了用此类脉冲驱动时尾波场加速的潜力。数值模拟预测，激光脉冲能量的50%可转移到能量高于15兆电子伏特的电子上，对于能量为数百兆电子伏特的电子，其电荷量超过几纳库仑。在这种情况下，激光脉冲迅速将其能量耗尽到等离子体中，驱动产生强烈的空化尾波场。自陡峭效应导致气泡持续延长，从而产生大量连续的自注入，这解释了束流极高的电荷量，使得这种方法适用于促进轫致辐射发射器和包括通过光核反应释放的中子在内的次级粒子发生器。
