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A method for reducing the complexity, and increasing the accuracy of field emission electron gun simulations

Yasrebi, N ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1016/j.vacuum.2013.02.013
  3. Publisher: 2013
  4. Abstract:
  5. Problems regarding simulation of field emitter array (FEA) electron guns are discussed. A simple method is proposed to significantly reduce computational requirements such as computation power, system memory, and time of FEA electron gun simulation and modeling. The method can be applied to any numerical solver regardless of its meshing technique. In order to extract field emission parameter from any experimental cathode I-V curve, a partly numerical algorithm, which uses the presented truncation method at the heart of its solver, is proposed. The proposed method and algorithm are applied to a number of examples, including a double-gated FEA problem, and its effectiveness in terms of error in spot size, particle trajectory simulation, and beam current calculation are compared to reported experimental values, and the simulation results based on other truncation methods
  6. Keywords:
  7. Electron gun simulation ; 3D field emission simulation ; Computational requirements ; Field emission arrays ; Field emitter arrays ; Field-emission electrons ; Numerical algorithms ; Particle trajectories ; Simulation and modeling ; Algorithms ; Electron guns ; Field emission ; Numerical methods ; Three dimensional computer graphics ; Field emission cathodes
  8. Source: Vacuum ; Volume 95 , 2013 , Pages 50-65 ; 0042207X (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0042207X13000651