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使用粒子模拟程序对30 fs超短超强激光在均匀与抛物型两种密度分布等离子体中的传输, 以及在稳定传输状态下尾场的电子注入与加速形成的电子能谱进行了模拟与分析. 固定入射激光束斑尺寸, 在(0.42)1019/cm3等离子体密度范围, 对比分析了归一化峰值强度从16范围的激光脉冲在上述两种密度分布等离子 体中传输时激光束斑尺寸的演化, 结果表明抛物型分布的等离子体密度通道能够对超短超强脉冲实现良好的导引, 有利于高能电子加速. 对于较高密度情况,即使在均匀等离子体中依靠相对论自聚 焦等机制也可以实现良好的自导引传输,有利于实验简化以及产生更大电量的加速电子.Simulations and analyses of ultra-short ultra-intense laser propagting in plasmas with uniform and parabolic density profiles, as well as the electron injection into the wake field and the electron spectra in the stable transmission state are performed by using a particle-in-cell code. Fixing the incident laser focal spot size but changing the plasma density in a range of (0.42)1019/cm3, comparative analyses are carried out of the evolutions of the laser beam spot during the propagation of the laser pulse in the plasmas with aforementioned two density profiles, with the normalized laser intensity ranging from 1 to 6. The results show that a plasma channel with a parabolic density profile can realize a good guiding of an ultra-short ultra-intense pulse, which is beneficial for high energy electron acceleration. However, at higher densities, self-guiding can be realized by relativistic self-focusing in uniform plasma, which is conducive to simplifying the experiment and to producing more accelerated electrons.
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[2] Esarey E, Sprangle P, Krall J, Ting A 1997 IEEE J. Quant. Electron. 33 1879
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[14] Lin H, Zha X J, Li R X, Chen L M, Xu Z Z 2006 Phys. Plasmas 13 103105
[15] Esarey E, Schroeder C B, Leemans W P 2009 Rev. Mod. Phys. 81 1229
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[19] Dong K G, Gu Y Q, Zhu B, Wu Y C, Cao L F, He Y L, Liu H J, Hong W, Zhou W M, Zhao Z Q, Jiao C Y, Wen X L, Zhang B H, Wang X F 2010 Acta Phys. Sin. 59 8733 (in Chinese) [董克攻, 谷渝秋, 朱斌, 吴玉迟, 曹磊峰, 何颖玲, 刘红杰, 洪伟, 周维民, 赵宗清, 焦春晔, 温贤伦, 张保汉, 王晓方 2010 物理学报 59 8733]
[20] Faure J, Glinec Y, Pukhov A, Kiselev S, Gordienko S, Lefebvre E, Rousseau J-P, Burgy F, Malka V 2004 Nature 431 541
[21] Leemans W P, Nagler B, Gonsalves A J, Toth Cs, Nakamura K, Geddes C G R, Esarey E, Schroeder C B, Hooker S M 2006 Nat. Phys. 2 696
[22] Ibbotson T P A, Bourgeois N, Rowlands-Rees T P, Caballero L S, Bajlekov S I, Walker P A, Kneip S, Mangles S P D, Nagel S R, Palmer C A J, Delerue N, Doucas G, Urner D, Chekhlov O, Clarke R J, Divall E, Ertel K, Foster P S, Hawkes S J, Hooker C J, Parry B, Rajeev P P, Streeter M J V, Hooker S M 2010 Phys. Rev. S.T. Accel. Beams. 13 031301
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[1] Monot P, Auguste T, Gibbon P, Jakober F, Mainfray G 1995 Phys. Rev. Lett. 74 2953
[2] Esarey E, Sprangle P, Krall J, Ting A 1997 IEEE J. Quant. Electron. 33 1879
[3] Geddes C G R, Toth C, van Tilborg J, Esarey E, Schroeder C B, Bruhwiler D, Nieter C, Cary J, Leemans W P 2004 Nature 431 538
[4] Tang H, Guo H, Liu M W, Chou Y L, Deng D M 2003 Acta Phys. Sin. 52 2170(in Chinese) [唐华, 郭弘,刘明伟, 仇云利, 邓冬梅 2003 物理学报 52 2170]
[5] Esarey E, Sprangle P 1996 IEEE Trans.Plasma Sci. 24 252
[6] Pukhov A, Meyer-ter-Vehn J 2002 Appl. Phys. B 74 355
[7] Lu W, Tzoufras M, Joshi C, Tsung F S, Mori W B, Vieira J, Fonseca R A, Silva L O 2007 Phys. Rev. S.T. Accel. Beams. 10 061301
[8] Ehrlich Y, Cohen C, Zigler A, Krall J, Sprangle P, Esarey E 1996 Phys. Rev. Lett. 77 4186
[9] Hosokai T, Kando M, Dewa H, Kotaki H, Kondo S, Hasegawa N, Nakajima K, Horioka K 2000 Opt. Lett. 25 10
[10] Spence D J, Hooker S M 2000 Phys. Rev. E 63 015401
[11] Milchberg H M, Durfee C G, Mcllrath T J 1995 Phys. Rev. Lett. 75 2494
[12] Gaul E W, Le Blanc S P, Rundquist A R, Zgadzaj R, Langhoff H, Downer M C 2000 Appl. Phys. Lett. 77 4112
[13] Thomas A G R, Najmudin Z, Mangles S P D, Murphy C D, Dangor A E, Kamperidis C, Lancaster K L, Mori W B, Norreys P A, Rozmus W, Krushelnick K 2007 Phys. Rev. Lett. 98 095004
[14] Lin H, Zha X J, Li R X, Chen L M, Xu Z Z 2006 Phys. Plasmas 13 103105
[15] Esarey E, Schroeder C B, Leemans W P 2009 Rev. Mod. Phys. 81 1229
[16] Schlenvoigt H P, Haupt K, Debus A, Budde F, Jackel O, Pfotenhauer S, Schwoerer H, Rohwer E, Gallacher J G, Brunetti E, Shanks R P, Wiggins S M, Jaroszynski D A 2008 Nat. Phys. 4 130
[17] Glinec Y, Faure J, Dain L L, Darbon S, Hosokai T, Santos J J, Lefebvre E, Rousseau J P, Burgy F, Mercier B, Malka V 2005 Phys. Rev. Lett. 94 025003
[18] Nieter C, Cary J R 2004 J. Comput. Phys. 196 448
[19] Dong K G, Gu Y Q, Zhu B, Wu Y C, Cao L F, He Y L, Liu H J, Hong W, Zhou W M, Zhao Z Q, Jiao C Y, Wen X L, Zhang B H, Wang X F 2010 Acta Phys. Sin. 59 8733 (in Chinese) [董克攻, 谷渝秋, 朱斌, 吴玉迟, 曹磊峰, 何颖玲, 刘红杰, 洪伟, 周维民, 赵宗清, 焦春晔, 温贤伦, 张保汉, 王晓方 2010 物理学报 59 8733]
[20] Faure J, Glinec Y, Pukhov A, Kiselev S, Gordienko S, Lefebvre E, Rousseau J-P, Burgy F, Malka V 2004 Nature 431 541
[21] Leemans W P, Nagler B, Gonsalves A J, Toth Cs, Nakamura K, Geddes C G R, Esarey E, Schroeder C B, Hooker S M 2006 Nat. Phys. 2 696
[22] Ibbotson T P A, Bourgeois N, Rowlands-Rees T P, Caballero L S, Bajlekov S I, Walker P A, Kneip S, Mangles S P D, Nagel S R, Palmer C A J, Delerue N, Doucas G, Urner D, Chekhlov O, Clarke R J, Divall E, Ertel K, Foster P S, Hawkes S J, Hooker C J, Parry B, Rajeev P P, Streeter M J V, Hooker S M 2010 Phys. Rev. S.T. Accel. Beams. 13 031301
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