Propagation of attosecond electron bunches along the cone-and-channel target

Yang, X. H.; Xu, H.; Ma, Y. Y.; Shao, F. Q.; Yin, Y.; Zhuo, H. B.; Yu, M. Y.; Tian, C. L.
February 2011
Physics of Plasmas;Feb2011, Vol. 18 Issue 2, p023109
Academic Journal
Generation and propagation of attosecond electron bunches along a cone-and-channel target are investigated by particle-in-cell simulation. The target electrons are pulled out by the oscillating electric field of an intense laser pulse irradiating a cone target and accelerated forward along the cone walls. It is shown that the energetic electrons can be further guided and confined by a channel attached to the cone tip. The propagation of these electrons along the channel induces a strong quasistatic magnetic field as well as a sheath electric field since a part of the energetic electrons expands into the surrounding vacuum. The electromagnetic field in turn confines the surface currents. With the cone-and-channel target the energetic electrons can be much better collimated and propagate much farther than that from the classical cone target.


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