中国物理B ›› 2006, Vol. 15 ›› Issue (5): 1028-1034.doi: 10.1088/1009-1963/15/5/027

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Thomson scattering off a pair (electron--positron) plasma

郑坚   

  1. CAS Key Laboratory of Basic Plasma Physics, Department of Modern Physics,University of Science and 230026, China
  • 收稿日期:2005-11-06 修回日期:2005-12-21 出版日期:2006-05-20 发布日期:2006-05-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10375064), and the National High Technology Inertial Confinement Fusion.

Thomson scattering off a pair (electron--positron) plasma

Zheng Jian (郑坚)   

  1. CAS Key Laboratory of Basic Plasma Physics, Department of Modern Physics,University of Science and Technology of China, Hefei 230026, China
  • Received:2005-11-06 Revised:2005-12-21 Online:2006-05-20 Published:2006-05-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10375064), and the National High Technology Inertial Confinement Fusion.

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摘要： Thomson scattering off a pair (electron--positron) plasma is theoretically investigated in the collisionless and collisional limits respectively. Our calculations show that the power spectrum of the Thomson scattering off a collisionless pair plasma is just proportional to the velocity distribution function of the particles in the plasma. Collective modes in the plasma do not have any effects on the Thomson scattering spectrum because of the correlation between the negatively- and positively-charged particles. In the collisional limit, the power spectrum of the Thomson scattering presents three spikes: two peaks correspond to two contra-propagating sound waves and one peak corresponds to an entropy wave.

关键词: pair plasma, Thomson scattering, dynamic form factor

Abstract: Thomson scattering off a pair (electron--positron) plasma is theoretically investigated in the collisionless and collisional limits respectively. Our calculations show that the power spectrum of the Thomson scattering off a collisionless pair plasma is just proportional to the velocity distribution function of the particles in the plasma. Collective modes in the plasma do not have any effects on the Thomson scattering spectrum because of the correlation between the negatively- and positively-charged particles. In the collisional limit, the power spectrum of the Thomson scattering presents three spikes: two peaks correspond to two contra-propagating sound waves and one peak corresponds to an entropy wave.

Key words: pair plasma, Thomson scattering, dynamic form factor

中图分类号:  (Electric and magnetic measurements)

  • 52.70.Ds
52.25.Fi (Transport properties) 52.25.Gj (Fluctuation and chaos phenomena) 52.25.Os (Emission, absorption, and scattering of electromagnetic radiation ?) 52.65.Ff (Fokker-Planck and Vlasov equation)