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Muon Lifetime

Muon Lifetime. Eric Chu & Joseph St. Marie. 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 2.19 µs.

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Muon Lifetime

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  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

  8. 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 • 1st graph = 1/0.386 = 2.591μs • 2nd 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.

  29. Results Cont.

  30. Results Cont.

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

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