Deep Inside the Atom (HSC SSCE Physics): Flashcards

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Further Evidence for Fundamental Particles
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Two sources of early particle discoveries

Cosmic-ray experiments and nuclear decay observations

Main problem with cosmic rays for experiments

Random arrival times and widely varying energies

Main limitation of nuclear decay for particle physics

Energy levels are too low to create massive particles

What particle accelerators provide

Controlled, high-energy particle beams for experiments

Half-life range of particles from accelerators

10610^{-6} s to 102310^{-23} s

Two field types used in particle accelerators

Electric fields (accelerate) and magnetic fields (steer)

What a synchrotron ring uses

Circular path with magnetic fields to accelerate particles

What is the LHC

World's largest particle accelerator, 100m underground

Maximum speed LHC accelerates protons to

0.99999999c0.99999999c (99.999999% speed of light)

What ATLAS detector at LHC discovered

Higgs boson (particle giving mass to matter)

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