Laue Patterns on the Siemens D-500
- Put your TLD ring on. If it is a visitor ring, record the ring
number in the log book.
- Record your code number, name, time on the hour log (on the goniometer),
and the time of day on the computer.
- Power up the system:
- 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.
- 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.
- Use the shutter for point focus (top, left button).
- Mount the sample with 2-sided tape or clay.
- 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.
- Mount the sample three centimeters away using the space bar.
- Prepare the camera for film: lever in the back to the right,
expose lever down.
- 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.
- Flip the expose lever up.
- Close the door of the D-500; open the shutter and start the
- Time the picture (10 - 15 minutes). A lower power needs a
- When done, close the shutter and flip the expose lever down.
- Push the paper all the way down (even with the top of the camera)
and flip the lever in the back to the left.
- Pull the film up and out of the camera with an even speed.
Let it develop for 15 seconds.
- Peel the paper off and discard--don't touch the chemicals!
- Cover the picture with fixer and wash your hands after touching
- Shut the system down.
- Close the shutter.
- Turn off the hour log.
- Remove your sample and the camera. Put the camera and the
holder back in the cabinet.
- 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!
- Bring the voltage down from 25 kV to 10 kV by increments of 1.
- Clean up sample prep area.
- Sign out in the computer; remember to record the number of films used.