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Observing Muons in the Classroom

Discover the world of cosmic rays and muons presented by physicist Howard Matis from Lawrence Berkeley National Laboratory. Learn about charged particles from space, cosmic ray origins, classroom detectors, measurements, and interactive activities. Explore the fascinating realm of particle physics, draw connections to real-life phenomena, and engage in hands-on learning experiences. Visit www.lbl.gov/abc/cosmic to start your cosmic journey today!

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Observing Muons in the Classroom

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  1. Observing Muons in the Classroom Presented by Howard Matis — hsmatis@lbl.govLawrence Berkeley National Laboratory

  2. What are Cosmic Rays? • Charged particles from the cosmos • Protons, alpha-particles, heavier nuclei • Energies can go up to 1020 eV (energy of 50 mph baseball) • At 1010 ev - 1000 per m2/s • At 1019 ev - 1 per km/s • (energy of old style tv ~103 ev) • Origins, sun, other stars, supernovae, other catastrophic astrophysical events

  3. How they interact in the earth

  4. A Classroom Detector Phototubes Scintillators CBLinterface Been to all continents but one.Hint, not Antarctica Circuit Board

  5. How it Works

  6. Measurements • Cosmic Rays • Flux and direction of cosmic ray • Rough energy analysis (use absorbers) • Singles Mode • Measure radioactivity • Mathematics • Measurement of a random phenomena • Describe statistical significance of a measurement

  7. Measure rate on earth and air

  8. The Detector Finished

  9. Summary • Cosmic rays are part of our life • Do particle physics in classroom and outside. • See www.lbl.gov/abc/cosmic. • You can build it, learn, and have fun.

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