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QuarkNet Cosmic Rays August 14, 2003

QuarkNet Cosmic Rays August 14, 2003. Niles West High School Skokie, IL Richard DeCoster. Enrollment about 2400 Physics Courses: AP Physics 1 section Advanced Physics Topics 1 section Honors Physics 4 section Physics, Regular 9 section Physics, Conceptual 5 sections.

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QuarkNet Cosmic Rays August 14, 2003

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  1. QuarkNet Cosmic RaysAugust 14, 2003 Niles West High School Skokie, IL Richard DeCoster Enrollment about 2400 Physics Courses: AP Physics 1 section Advanced Physics Topics 1 section Honors Physics 4 section Physics, Regular 9 section Physics, Conceptual 5 sections

  2. Cosmic Ray ClassesBrief History TEACHERS 1999: Summer-8 Weeks at FNAL/D0 2000: Associate Teachers Institute NWHS, with follow-up 2000-2001 school year 2001: Summer Institute at Fermilab CLASSROOM IMPLEMENTATION 2001: Regular Physics [3 sections] APT [1 sect.] 2002: Regular Physics [1 sect.] Honors [3 sect.]

  3. The Teachers

  4. Teachers at Work

  5. Electronics Photons collected here Photons produced here Scintillator Paddle • Physical object which collects data. • After a muon interaction, the right side produces photons. • These photons are collected on the left side by a photomultiplier (PM) tube and converted to an electric signal. • Signal is sent to electronics array.

  6. Equipment List • Plexiglass Scintillator Paddles (2); • Photomultiplier Tube (2); • Oscilloscope ; The Oscilloscope should have two channels and external triggering capabilities. • High Voltage Power Supply(2); The power supply must reach levels near 2000 V to power the photomultiplier tubes.

  7. The Electronics Array Signal Delay Unit Singles Event Counter Coincidence Event Counter Discriminator Logic Gate

  8. Equipment List Cont. • NIM-Bin Electronics Rack; Holds counting/measuring equipment. • 2 Channel Signal Strength Discriminator • 2 Channel Digital Event Counter • AND Logic Gate • Coincident Event Counter • Cabling: • 2 High-voltage coaxial cables w/ 50 Ohm Limo Connections • 12 4ns length coaxial cables w/ 50 Ohm Limo Connections.

  9. Sample Instruction Sheet

  10. Data Tables

  11. Plot of Observations

  12. Data: Coincidences

  13. Plot of Observations 2

  14. Summary • INVOLVEMENT OF CLASSROOM TEACHERS AND STUDENTS • EQUIPMENT: SCINTILLATOR, PM TUBE, COUNTING APPARATUS • SAMPLE DATA ANALYSIS • OTHER EXPERIMENTS: STATISTICS, CHANGING OVERLAP AREA, CHANGING DETECTOR ORIENTATION, ABSORPTION, CLOUD CHAMBER

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