Simulation of monoenergetic electron generation via laser wakefield accelerators for 5–25TW lasersa)
Simulation of monoenergetic electron generation via laser wakefield accelerators for 5–25TW lasersa)
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DOI：
10.1063/1.2198535
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发表时间：
2006-05
影响因子：
2.2
通讯作者：
F. Tsung;Weixing Lu;M. Tzoufras;W. Mori;C. Joshi;J. Vieira;L. Silva;R. Fonseca
中科院分区：
文献类型：
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作者：
F. Tsung;Weixing Lu;M. Tzoufras;W. Mori;C. Joshi;J. Vieira;L. Silva;R. Fonseca
2004年，使用3D颗粒细胞（PIC）模型[F. S. Tsung 等人，物理学。莱特牧师。 93, 185004 (2004)]，预测16.5TW、50fs激光传播通过近0.5cm的3×1018cm−3预制等离子体通道将在传播0.5cm后产生中心能量为240MeV的单能电子束。此外，如果激光传播通过 0.8 厘米的相同等离子体，则可以看到高达 840MeV 的电子。模拟表明，由于光子减速、群速度色散和自聚焦的结合，激光强度增加后会发生自注入。单能光束的产生是因为注入过程被光束加载和光束相空间旋转所限制。几乎同时[S. P. D. Mangles 等人，Nature 431, 535 (2004)； C. G. R. Geddes 等人，同上。 431, 538 (2004); J. Faure 等人，同上。 431, 541 (2004)]来自世界各地的三个实验小组报告了近纳米碳纳米管的生成...
In 2004, using a 3D particle-in-cell (PIC) model [F. S. Tsung et al., Phys. Rev. Lett. 93, 185004 (2004)], it was predicted that a 16.5TW, 50fs laser propagating through nearly 0.5cm of 3×1018cm−3 preformed plasma channel would generate a monoenergetic bunch of electrons with a central energy of 240MeV after 0.5cm of propagation. In addition, electrons out to 840MeV were seen if the laser propagated through 0.8cm of the same plasma. The simulations showed that self-injection occurs after the laser intensity increases due to a combination of photon deceleration, group velocity dispersion, and self-focusing. The monoenergetic beam is produced because the injection process is clamped by beam loading and the rotation in phase space that results as the beam dephases. Nearly simultaneously [S. P. D. Mangles et al., Nature 431, 535 (2004); C. G. R. Geddes et al., ibid. 431, 538 (2004); J. Faure et al., ibid. 431, 541 (2004)] three experimental groups from around the world reported the generation of near nano-Cou...