Dephasing time of a positron accelerated by a laser pulse

doi:10.1088/1009-1963/11/4/311

中国物理B ›› 2002, Vol. 11 ›› Issue (4): 375-378.doi: 10.1088/1009-1963/11/4/311

Dephasing time of a positron accelerated by a laser pulse

杜春光, 李师群

Department of Physics, Tsinghua University, Beijing 100084, China

收稿日期:2001-07-23 修回日期:2001-12-19 出版日期:2002-04-13 发布日期:2005-06-13
基金资助:
Project supported by the Postdoctoral Science Foundation of China (Grant No 10000).

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

Received:2001-07-23 Revised:2001-12-19 Online:2002-04-13 Published:2005-06-13
Supported by:
Project supported by the Postdoctoral Science Foundation of China (Grant No 10000).

摘要/Abstract

摘要： 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》λ_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.

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.

Key words: positron acceleration, dephasing time, laser-plasma interactions

中图分类号: (Laser-plasma acceleration of electrons and ions)

52.38.Kd

52.25.-b (Plasma properties)

杜春光, 李师群. Dephasing time of a positron accelerated by a laser pulse[J]. 中国物理B, 2002, 11(4): 375-378.

Du Chun-Guang (杜春光), Li Shi-Qun (李师群). Dephasing time of a positron accelerated by a laser pulse[J]. Chinese Physics, 2002, 11(4): 375-378.

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Dephasing time of a positron accelerated by a laser pulse

Dephasing time of a positron accelerated by a laser pulse

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