1. Muon Lifetime Eric Chu & Joseph St. Marie

2. Goals of our Experience Gain an understanding of electronics Design and run a working muon experiment Analyze data and improvement experiment Run final experiment Acquire data reading the lifetime of the muon to be close to 2.19µs.

3. Understand the Electronics How do we use the oscilloscope? What is a scintillator? How does the setup work?

4. An Oscilloscope is…

5. A Scintillator is…

6. The Setup is…

7. Preparation Conversion Graph

9. Setup

10. First Experiment Started: June 25 at 16:00 Ended: June 28 at 15:38

11. Results

12. Results Cont.

13. Errors Thresholds not set Scintillator D broken Scintillator C not receiving ample voltage

14. What they Mean Equation used is 1/c 1 st graph = 1/0.386 = 2.591μs 2 nd graph = 1/0.397 = 2.519μs

15. Final Experiment Started: July 2 at 12:45 Ended: July 6 at 9:20

16. Preparation Coincidence graphs Singles graphs New power supply Rearranging the setup

17. Coincidence Between Scintillators A & B (B fixed)

18. Coincidence Between Scintillators A & B (A fixed)

19. Coincidence Between Scintillators B & C (B fixed)

20. Singles Graph To see what kind of particles are coming through (distinguish between noise and “real” particles) Get a better understanding of how threshold affects counts

21. Scintillator A Singles

22. Scintillator B Singles

23. Scintillator C Singles

24. Scintillator D Singles*

25. Coincidence Graphs Final Threshold Levels: –Scintillator A: 120.026 mV –Scintillator B: 200.110 mV –Scintillator C: 70.601 mV

26. New Setup

27. Results

28. Results Cont.

31. What they Mean Equation used is 1/c 1 st graph = 1/0.567 = 1.764μs 2 nd graph = 1/0.655 = 1.527μs 3 rd graph = 1/0.462 = 2.165μs 4 th graph = 1/0.501 = 1.996μs

32. Errors Different setup Width Faulty equipment Different conversion at lower levels? Or... Fireworks!!

33. El Fin (Spanish for “The End”)