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Paraxial electron optics and its spatial-temporal aberrations for a bi-electrode concentric spherical system with electrostatic focusing

Zhang Zhi-Quan Zhang Yi-Fei Zhou Li-Wei Gong Hui

Paraxial electron optics and its spatial-temporal aberrations for a bi-electrode concentric spherical system with electrostatic focusing

Zhang Zhi-Quan, Zhang Yi-Fei, Zhou Li-Wei, Gong Hui
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  • Received Date:  22 August 2009
  • Accepted Date:  28 February 2010
  • Published Online:  15 August 2010

Paraxial electron optics and its spatial-temporal aberrations for a bi-electrode concentric spherical system with electrostatic focusing

  • 1. (1)Department of Control Engineering, Institute of Armored Force Engineering, Beijing 100072, China; (2)School of Photonics, Beijing Institute of Technology, Beijing 100081, China

Abstract: In this paper, we use the paraxial equations to study the spatial-temporal trajectories and their aberrations for a bi-electrode concentric spherical system with electrostatic focusing. In the present paper, starting from the paraxial ray equation and the paraxial motion equation, the paraxial spatial-temporal trajectory of moving electron emitted from the photocathode is obtained for a bi-electrode concentric spherical system with electrostatic focusing. The paraxial static and dynamic electron optics, as well as the paraxial spatial-temporal aberrations in this system are then discussed, the general regularity of imaging in paraxial optical system has been explored. The paraxial spatial aberrations, as well as the paraxial temporal aberrations with different orders, have been defined and deduced. Thus we get same conclusions about paraxial spatial and temporal aberrations as it has been given in paper[1], and it completely shows that the paraxial spatial-temporal aberrations can be investigated directly from the paraxial ray equation and paraxial motion equation.

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