ESTRO course Dose Modelling and Verification 2017

8

Target materials

e -

X-ray targets can be constructed in two layers; one high- Z (W, Au) for photon production and a second layer with lower Z (Cu, Al) to fully stop the electrons and harden the photon spectrum. (and providing cooling)

h 

4 MeV e -

H

2 O: 97 mm

W: 4.7 mm

W

H

2 O: 21 mm

 3 mm

W: 1.7 mm

Cu

Karzmark et al [1]

T Knöös

Warsaw 2017