7A60.10-Electron Diffraction

Video: Watch this demo

Instructor video

Description: This apparatus is used to show the diffraction patterns of an electron beam.

Equipment:

• Electron Diffraction apparatus
• (Optional) Video camera

Setup Procedure:

1. Turn the power supply on and check that the electron beam is visible on the screen.
2. (Optional) Setup a video camera on the diffraction screen for large classes.

Demonstration Procedure:

1. Turn on the Electron diffraction apparatus.
2. Wait for the beam to show up.
3. Using the vertical and horizontal control knobs, move the electron beam until you notice a diffraction pattern. This may take a little guess work.
4. This demo can produce three different diffraction patterns (see above pictures). This shows that an electron beam can exhibit diffraction patterns much like E&M waves.
5. Make slight adjustments to the intensity knob to obtain a good picture.
6. Do not leave the apparatus on for long periods of time.
7. When finished, turn off the Diffraction tube.

Note: This apparatus is heavy, and the weight is near the front screen.

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