1. Stern-Gerlach Experiment Physics 243 Fall 2007 Chris Osborn Daniel Richman

2. Status Report Components of the experiment Gradus ad parnassum Current stage Degas?

3. Components detector – reads current from ions from potassium oven

4. Components handle for detection rotation

5. Components electromagnet driving coils

6. Components mechanical pump

7. Components diffusion pump water cooling pipes

8. Components potassium oven

9. Components pressure gauge via ionization

10. Components ionization gauge pressure gauge thermocouple gauge electrometer magnet power supply

11. Gradus ad parnassum Evacuate chamber –mechanical to 10 -2 mbar –diffusion to 4x10 -5 mbar (with cooling) Potassium oven –load potassium under nitrogen pressure –heat to 180 o C – 250 o C Detect beam of particles –Do we have a collimated/directed beam? –Why aren’t we seeing a current on electrometer? no consistent behavior of electrometer

12. degas button?

13. Edgar Degas (1834 – 1917) Draughtsman, Painter, Sculptor A founder of the Impressionists, though he rejected the label