Dose 2016

Scanning results in a 5 MV X-ray beam using p-Si diodes.

Low energy in combination with large beams (here 5 MV and 40x40 cm 2 ) displays the largest deviations for Si diodes.

Unshielde d diode

Large fraction of scattered low-energy photons

Ion

=shielded

Unshielded diode

chamber

diode

Ion

Increasing fraction of scattered low-energy photons

chamber

Data from Scanditronix