Home > Instruments > Siemens D-500 > Description > Laue Patterns

Photo of instrument

X-ray Diffraction & Scattering
Wide Angle

Siemens D-500

Laue Patterns on the Siemens D-500

  1. Put your TLD ring on.  If it is a visitor ring, record the ring number in the log book.
  2. Record your code number, name, time on the hour log (on the goniometer), and the time of day on the computer.
  3. Power up the system:
    1. Bring voltage from 10 kV to 25 kV by flipping the switch one kV at a time.  Note: at 19, flip both the 10's and 1's at the same time.
    2. Bring amperage from 5 mA to ~30 mA by flipping the left switch one mA at a time.  Leave the right switch set where it is.
  4. Use the shutter for point focus (top, left button).
  5. Starting:
    1. Mount the sample with 2-sided tape or clay.
    2. Mount the camera on the track in front of the x-ray tube.  Make sure the open hole is in the beam path, not the lead.  Don't push the camera up too close or you won't get a beam.
    3. Mount the sample three centimeters away using the space bar.
    4. Prepare the camera for film: lever in the back to the right, expose lever down.
    5. Put the film in, push it all the way down and pull the paper back up.  The 57 should be just above the top of the camera.
    6. Flip the expose lever up.
    7. Close the door of the D-500; open the shutter and start the stopwatch.
    8. Time the picture (10 - 15 minutes).  A lower power needs a longer exposure.
    9. When done, close the shutter and flip the expose lever down.
    10. Push the paper all the way down (even with the top of the camera) and flip the lever in the back to the left.
    11. Pull the film up and out of the camera with an even speed.  Let it develop for 15 seconds.
    12. Peel the paper off and discard--don't touch the chemicals!
    13. Cover the picture with fixer and wash your hands after touching any chemicals.
  6. Shut the system down.
    1. Close the shutter.
    2. Turn off the hour log.
    3. Remove your sample and the camera.  Put the camera and the holder back in the cabinet.
    4. If no one is scheduled immediately after you, bring the amperage down from 30 mA to 5 mA by increments of one.

      Remember to turn the amperage down first!
    5. Bring the voltage down from 25 kV to 10 kV by increments of 1.
    6. Clean up sample prep area.
    7. Sign out in the computer; remember to record the number of films used.