Dose Course 2018_Flipping book

Output factors for large fields using diodes Shielded Si diodes for compensation of photon energy dependence.

Incident beam direction

0.7

Scattered (low- energy) photons

In PTW photon diodes the backscatter shield is made of steel instead.

- Plastic

Silicon chip (2.3 g/cm 3 )

Based on figure by Eklund et al [6] describing IBA Dosimetry diodes (EFD/PFD)