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Observing Muons in the Classroom

Observing Muons in the Classroom. Presented by Howard Matis — hsmatis@lbl.gov Lawrence Berkeley National Laboratory. What are Cosmic Rays?. Charged particles from the cosmos Protons, alpha-particles, heavier nuclei Energies can go up to 10 20 eV (energy of 50 mph baseball)

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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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