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Exploring Particle Physics Through Bubble Chambers: A Workshop for Advanced Students

This engaging workshop is tailored for grade 12 students and first-year university students interested in particle physics. Building on key concepts such as electric and magnetic fields, conservation of charge, and the Lorentz force, participants will analyze particle interactions within a bubble chamber filled with liquid hydrogen. Through hands-on activities and mini-lessons, students will track particle paths, determine momentum, and explore the implications of conservation laws in collisions. Join us to deepen your understanding and connect with the wonders of the Large Hadron Collider (LHC).

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Exploring Particle Physics Through Bubble Chambers: A Workshop for Advanced Students

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Presentation Transcript

  1. Group 2 Bubble Chamber Workshop

  2. Who is this presentation for? • Students in grade 12 or 1st year university (depends on the country and the program) • Prerequisite knowledge: • Electric and magnetic fields • Conservation of charge • Conservation of linear momentum in 2D • Lorentz force, trajectory of charged particles in perpendicular magnetic fields (i.e. hand rule!)

  3. Resources

  4. Activity • What do you see?

  5. Mini-lesson • Which way are the smallest, spiraling tracks going within an individual photo? These are all made by electrons.

  6. Activity • What are the other tracks doing? What are their charges? What is the charge of the incoming beam?

  7. Mini-lesson • A bubble chamber is filled with liquid hydrogen gas. • The particles that make up the incoming beam collide with the protons in the hydrogen gas. Protons are always the target. • How do we apply conservation of charge to these interactions?

  8. Activity: Applying cons. of charge • Go back to your photographs….does using conservation of charge predict the same charges as you got previously from using the radius?

  9. Mini-lesson • Radius can be used to determine the momentum of the particle that made a track

  10. Activity • Measure the radius of each track. • Use the radius to determine the momentum of the particle that made each track.

  11. Mini-lesson • How do we analyze the momentum of linear collisions in 2D?

  12. Activity • Set x and y axis on your photograph. Using a protractor to measure angles, measure the total momentum in the x and in the y before and after the collision.

  13. Mini-lesson • Why was momentum not conserved in some of the photographs? • Interaction might not be in the plane of the photograph • A neutral particle may have carried some of the “missing” momentum

  14. Links to the LHC

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