Weakly relativistic and ponderomotive effects on the density steepening in the interaction of an intense laser pulse with an underdense plasma

被引:58
|
作者
Niknam, A. R. [1 ]
Hashemzadeh, M. [1 ]
Shokri, B. [1 ]
机构
[1] Shahid Beheshti Univ, Laser & Plasma Res Inst, GC, Tehran, Iran
关键词
electron density; permittivity; plasma light propagation; plasma nonlinear processes; plasma temperature; relativistic plasmas; FORCE; ACCELERATION;
D O I
10.1063/1.3081098
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
The effect of the weakly relativistic ponderomotive force in the interaction of an intense laser pulse with an underdense plasma is studied. This force modifies the electron density distribution. Furthermore, the existence of intense laser pulses in plasma causes the electron relativistic mass to appear and, consequently, the plasma frequency decreases. It is clear that the electron temperature also affects the dielectric permittivity of plasma. By considering the weakly relativistic and ponderomotive effects, the nonlinear dielectric permittivity of plasma is obtained. Taking into account the Maxwell equations and the nonlinear dielectric permittivity, the electric and magnetic field profiles in plasma are investigated. It is shown that the electromagnetic field profiles deviate from sinusoidal structure. Also, the steepening of the electron density profile decreases by increasing the electron temperature and decreasing the laser pulse intensity. The wavelength of oscillations decreases by increasing the energy flux. Finally, it is found that the electric and magnetic field profiles are lengthened by increasing the electron temperature.
引用
收藏
页数:5
相关论文
共 50 条
  • [1] Effects of Relativistic and Ponderomotive Nonlinearities on an Intense Laser Pulse Propagation in a Plasma Channel
    刘明萍
    郑振
    刘三秋
    戴伟华
    刘杰
    [J]. Communications in Theoretical Physics, 2012, 58 (10) : 569 - 572
  • [2] Effects of Relativistic and Ponderomotive Nonlinearities on an Intense Laser Pulse Propagation in a Plasma Channel
    Liu Ming-Ping
    Zheng Zhen
    Liu San-Qiu
    Dai Wei-Hua
    Liu Jie
    [J]. COMMUNICATIONS IN THEORETICAL PHYSICS, 2012, 58 (04) : 569 - 572
  • [3] Weakly relativistic and ponderomotive effects in interaction of intense laser beam with inhomogeneous collisionless and collisional plasmas
    Niknam, A. R.
    Milani, M. R. Jafari
    Bokaei, B.
    Hashemzadeh, M.
    [J]. WAVES IN RANDOM AND COMPLEX MEDIA, 2014, 24 (01) : 1 - 18
  • [4] Electron acceleration by relativistic pondermotive force in the interaction of intense laser pulse with an axially inhomogeneous underdense plasma
    Xia, Xiongping
    Wei, Guimei
    Tian, Kaijing
    Chen, Junxue
    Liang, Qiuqun
    [J]. MODERN PHYSICS LETTERS B, 2022, 36 (26N27):
  • [5] INTENSE MAGNETIC-FIELD GENERATION BY RELATIVISTIC PONDEROMOTIVE FORCE IN AN UNDERDENSE PLASMA
    LEHNER, T
    [J]. PHYSICA SCRIPTA, 1994, 49 (06): : 704 - 711
  • [6] Relativistic and ponderomotive effects on laser plasma interaction dynamics
    Jha, P
    Wadhwani, N
    Raj, G
    Upadhyaya, AK
    [J]. PHYSICS OF PLASMAS, 2004, 11 (05) : 1834 - 1839
  • [7] Hydrodynamic approach to the interaction of a relativistic ultrashort laser pulse with an underdense plasma
    Farina, D
    Lontano, M
    Murusidze, IG
    Mikeladze, SV
    [J]. PHYSICAL REVIEW E, 2001, 63 (05): : 564091 - 5640910
  • [8] Relativistic and ponderomotive effects on stimulated Raman scattering of intense laser radiation in plasma
    Jha, Pallavi
    Raj, Gaurav
    Upadhyaya, Ajay K.
    [J]. IEEE TRANSACTIONS ON PLASMA SCIENCE, 2006, 34 (03) : 922 - 926
  • [9] Relativistic electron drift in underdense plasma produced by a super-intense femtosecond laser pulse
    Sofronov, AV
    Krainov, VP
    [J]. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2004, 37 (17) : L329 - L336
  • [10] Relativistic High Harmonics Generation in Underdense Plasma Produced by a Super Intense Femtosecond Laser Pulse
    Abbasi, F.
    Salimi, K.
    [J]. PIERS 2009 BEIJING: PROGESS IN ELECTROMAGNETICS RESEARCH SYMPOSIUM, PROCEEDINGS I AND II, 2009, : 1025 - 1029