1 bragg curve protons and carbon. 2 application of range the localized energy deposition of heavy...

22
1 Bragg Curve Protons and Carbon

Post on 21-Dec-2015

215 views

Category:

Documents


1 download

TRANSCRIPT

Page 1: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

1

Bragg CurveProtons and

Carbon

Page 2: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

2

Application of RangeThe localized energy deposition of

heavy charged particles can be useful therapeutically = proton radiation therapy

Page 3: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

3

Proton Therapy

Page 4: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

4

Proton Therapy

Energy range of interest from 50 (eye) – 250 (prostate) MeV

Page 5: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

5

Proton Therapy

asdf

Page 6: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

6

Proton Therapy

Modulator, aperture, and compensator

Modulator

Page 7: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

7

Proton Therapy

Page 8: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

8

Proton Therapy

Lung cancer treatment Intensity modulated radiation therapy

vs proton therapy

Page 9: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

9

CyclotronThe 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

Page 10: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

10

CyclotronPrinciple of operation

Particle acceleration is achieved using an RF field between “dees” with a constant magnetic field to guide the particles

Page 11: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

11

CyclotronPrinciple of operation

c approaches vas cancelt won'

momentum and velocity in vsince relativityby Limited

222

daccelerate is particle the

asconstant remainsfrequency that theNote

for 2

m

eB

mv

eBvvf

e

p

e

mvB

cvmv

qvB

Page 12: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

12

CyclotronWhy don’t the particles hit the pole

pieces? The fringe field (gradient) provides vertical

and (less obviously) horizontal focusing

Page 13: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

13

CyclotronTRIUMF in Canada has the world’s largest

cyclotron

Page 14: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

14

CyclotronTRIUMF

Page 15: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

15

CyclotronNSCL cyclotron at Michigan State

Page 16: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

16

Cyclotron

Page 17: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

17

Page 18: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

18

Page 19: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

19

Page 20: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

20

Page 21: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

21

Page 22: 1 Bragg Curve  Protons and Carbon. 2 Application of Range  The localized energy deposition of heavy charged particles can be useful therapeutically

22