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Bragg Curve

Bragg Curve. Protons and Carbon. Application of Range. The localized energy deposition of heavy charged particles can be useful therapeutically = proton radiation therapy. Proton Therapy. Proton Therapy. Energy range of interest from 50 (eye) – 250 (prostate) MeV. Proton Therapy. asdf.

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Bragg Curve

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  1. Bragg Curve • Protons and Carbon

  2. Application of Range • The localized energy deposition of heavy charged particles can be useful therapeutically = proton radiation therapy

  3. Proton Therapy

  4. Proton Therapy • Energy range of interest from 50 (eye) – 250 (prostate) MeV

  5. Proton Therapy • asdf

  6. Proton Therapy • Modulator, aperture, and compensator Modulator

  7. Proton Therapy

  8. Proton Therapy • Lung cancer treatment • Intensity modulated radiation therapy vs proton therapy

  9. Cyclotron • The first circular accelerator was the cyclotron • Developed by Lawrence in 1931 (for $25) • Grad student Livingston built it for his thesis • About 4 inches in diameter

  10. Cyclotron • Principle of operation • Particle acceleration is achieved using an RF field between “dees” with a constant magnetic field to guide the particles

  11. Cyclotron • Principle of operation

  12. Cyclotron • Why don’t the particles hit the pole pieces? • The fringe field (gradient) provides vertical and (less obviously) horizontal focusing

  13. Cyclotron • TRIUMF in Canada has the world’s largest cyclotron

  14. Cyclotron • TRIUMF

  15. Cyclotron • NSCL cyclotron at Michigan State

  16. Cyclotron

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