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Basic operations of Transmission Electron Microscope (Imaging and Diffraction Pattern)

1. Which of the following is NOT an electron source:

a: SiO<sub>2</sub> b: W-filament c: LabB<sub>6</sub> d: CeB<sub>6</sub>

2. What is the typical voltage in a conventional TEM instrument?

a: 230 V b: 440 V c: 20 kV d: 200 kV

3. What is the typical level of vacuum required in the TEM?

a: 1 - 10 torr b: 10<sup>-1</sup> -10<sup>-2</sup> torr c: 10<sup>-3</sup> - 10<sup>-5</sup> torr d: 10<sup>-6</sup> - 10<sup>-8</sup> torr

4. Which of the following is used to obtain diffraction pattern?

a: Elastically scattered electrons b: Inelastically scattered electrons c: Transmitted electrons d: X-rays

5. Which of the following is used to obtain Kikuchi patterns?

a: Elastically scattered electrons b: Inelastically scattered electrons c: Transmitted electrons d: X-rays

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