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Current source for electron optics
Vomela, Roman ; Horský, Pavel (referee) ; Kolka, Zdeněk (advisor)
This master thesis focuses on the design of a precision current source for a magnetic lens. First, electron microscopy is explained because the magnetic lens, or coil, is part of the electron microscope. Then the control principle of the magnetic lens and its properties are explained. In the next section, the design of a bipolar current source and the requirements for output current stability are discussed. The thesis includes a description of the circuit diagram of the proposed current source. Finally, the current source is realized and the basic parameters, especially the stability of the output current, are measured.
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Current source for electron optics
Vomela, Roman ; Horský, Pavel (referee) ; Kolka, Zdeněk (advisor)
This master thesis focuses on the design of a precision current source for a magnetic lens. First, electron microscopy is explained because the magnetic lens, or coil, is part of the electron microscope. Then the control principle of the magnetic lens and its properties are explained. In the next section, the design of a bipolar current source and the requirements for output current stability are discussed. The thesis includes a description of the circuit diagram of the proposed current source. Finally, the current source is realized and the basic parameters, especially the stability of the output current, are measured.
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