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Chinese Physics, 2002, Vol. 11(4): 375-378    DOI: 10.1088/1009-1963/11/4/311

Dephasing time of a positron accelerated by a laser pulse

Du Chun-Guang (杜春光), Li Shi-Qun (李师群)
Department of Physics, Tsinghua University, Beijing 100084, China
Abstract  The dephasing time of a positron in the total field associated with a laser pulse in a plasma J28is studied numerically. It is shown that the dynamics of the positron is quite different from that of an electron due to the electrostatic potential in the body of the pulse. The dephasing time of the positron increases with the pulse length and decreases with the pulse intensity nonlinearly. In the long pulse case ($L\gg \lambda_p$) the dephasing time is proportional to the pulse length. These results provide a scientific basis for experiments to observe the positron acceleration scheme, and may be important to the physics of laser-article interactions in multi-component plasmas.
Keywords:  positron acceleration      dephasing time      laser-plasma interactions  
Received:  23 July 2001      Revised:  19 December 2001      Accepted manuscript online: 
PACS:  52.38.Kd (Laser-plasma acceleration of electrons and ions)  
  52.25.-b (Plasma properties)  
Fund: Project supported by the Postdoctoral Science Foundation of China (Grant No 10000).

Cite this article: 

Du Chun-Guang (杜春光), Li Shi-Qun (李师群) Dephasing time of a positron accelerated by a laser pulse 2002 Chinese Physics 11 375

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