论文标题
LWFA从自调整转变为井喷政权的自我注射过程的演变
Evolution of the self-injection process in the transition of an LWFA from self-modulation to blowout regime
论文作者
论文摘要
长波长红外（LWIR）激光驱动的等离子体Wakefield加速器在自我调制的激光Wakefield加速器（SM-LWFA）中进行了研究，并使用3D粒子中的模拟模拟进行了井喷状态。仿真结果表明，在SM-LWFA制度中，自我注射会出现波浪破裂，而在井喷状态下，在模拟条件下未观察到自我注射。 SM-LWFA状态中的波浪破裂过程发生在明显低于1D波破阈值的场强。此过程以较高的激光功率和等离子密度增强，并在低血浆密度下被抑制（$ \ leq 1 \ times10^{17} $ $ $ $ cm^{ - 3} $在这里）。产生的电子显示与激光波长相匹配的空间调制，这是直接激光加速度（DLA）的明确签名。
Long wavelength infrared (LWIR) laser driven plasma wakefield accelerators are investigated here in the self-modulated laser wakefield acceleration (SM-LWFA) and blowout regimes using 3D Particle-in-Cell simulations. The simulation results show that in SM-LWFA regime, self-injection arises with wave breaking, whereas in the blowout regime, self-injection is not observed under the simulation conditions. The wave breaking process in SM-LWFA regime occurs at a field strength that is significantly below the 1D wave-breaking threshold. This process intensifies at higher laser power and plasma density and is suppressed at low plasma densities ($\leq 1\times10^{17}$ $cm^{-3}$ here). The produced electrons show spatial modulations with a period matching that of the laser wavelength, which is a clear signature of direct laser acceleration (DLA).
