Investigation of Magnetic and Electromagnetic Methods in Electron Beam Shaping and their Scaling Behavior for Nanometric field Emitters

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Riazi, Arash | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 44935 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Rashidian, Bizhan
Abstract:
Nowadays electron beams have extensive applications in electon-optic devices such as microwave devices, electron microscopes and flat displays. So shaping and confinment of electron beams is of great importance. In the other hand, scaling of electron emitters to atomic limit causes new chalanges in reliability and beam shaping. Designing electron optic devices for nanoscale emitters needs great knowledge regarding materials properties and electron optic systems behavior in nano scale. In this study, beside providing basic optics of electron beam and effects Of external electronmagnetic fields, properties of electron optical devices
Considering nano scale limitations is considered. In continue we designe two conventional beam shaping strucure such as einzel lens and PPM for nano scale emitters and verify them using CST simulation
Keywords:
Electron Optical Devices ; Beam Shaping ; Einzel Lens ; Periodic Permanent Magnet

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