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FEG Alignment in the Tecnai F30

9/6/02. Tecnai User Group Meeting. Outline. Overview-OperationImportant Operation ParametersFEG RegistersBasic AlignmentAdvanced Alignment ProceduresTEM Modes and Alignment. 9/6/02. Tecnai User Group Meeting. Outline. OverviewField Emission Gun (FEG)FEG AssemblyAdvantagesImportant Operatio

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FEG Alignment in the Tecnai F30

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    1. 9/6/02 Tecnai User Group Meeting FEG Alignment in the Tecnai F30 Chris Deeb Case Western Reserve University Dept. of Materials Science and Engineering

    2. 9/6/02 Tecnai User Group Meeting Outline Overview-Operation Important Operation Parameters FEG Registers Basic Alignment Advanced Alignment Procedures TEM Modes and Alignment

    3. 9/6/02 Tecnai User Group Meeting Outline Overview Field Emission Gun (FEG) FEG Assembly Advantages Important Operation Parameters FEG Registers Basic Alignment Advanced Alignment Procedures TEM Modes and Alignment

    4. 9/6/02 Tecnai User Group Meeting Overview-FEG Tungsten (100) Tip F30 has a Schottky FEG ZrO2 coated tip Electrons originate from the center of the tip yields smaller apparent (virtual) source Gives high brightness and sharp angular current distribution

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