Chin. Phys. Lett.  2004, Vol. 21 Issue (12): 2414-2417    DOI:
Original Articles |
Effect of Cluster Coulomb Fields on Electron Acceleration in Laser--Cluster Interaction
CANG Yu1,2;DONG Quan-Li1;WU Hui-Chun1,2;SHENG Zheng-Ming1;YU Wei2;ZHANG Jie1
1Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 2Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
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CANG Yu, DONG Quan-Li, WU Hui-Chun et al  2004 Chin. Phys. Lett. 21 2414-2417
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Abstract Single particle simulations are used to investigate electron acceleration in the laser--cluster interaction, taking into account the Coulomb fields around individual clusters. These Coulomb fields are induced from the cluster cores with positive charge when electrons escape from the cluster cores through ponderomotive push from the laser field. These Coulomb fields enable some stripped electrons to be stochastically in phases with the laser fields so that they can gain net energy from the laser efficiently. In this heating mechanism, circularly polarized lasers, larger cluster size and higher cluster densities make the acceleration more efficient.
Keywords: 36.40.Gk      52.50.Jm     
Published: 01 December 2004
PACS:  36.40.Gk (Plasma and collective effects in clusters)  
  52.50.Jm (Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.))  
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