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Wedge induced beam quality shifts
45
Zhu
et al
[9]
Physical wedges filter the beam, yielding beam hardening. Although,
above approx. 15 MV the pair production process will balance the
hardening, resulting in unaffected (or even softer) beam quality.
Knöös and Wittgren [16]
Utrecht 2016
PW60=60 deg Physical wedge
VW60=60 deg Virtual wedge