Characterisation of the half-field beam penumbra for a variety of blocking set-ups | Zendy

Saige Smith | Zendy; Tanya Kairn | Zendy; Scott Crowe | Zendy; Andre Asena | Zendy; Jamie Trapp | Zendy

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Characterisation of the half-field beam penumbra for a variety of blocking set-ups

Author(s) -

Saige Smith,

Tanya Kairn,

Scott Crowe,

Andre Asena,

Jamie Trapp

Publication year - 2015

Publication title -

journal of physics conference series

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.21

H-Index - 85

eISSN - 1742-6596

pISSN - 1742-6588

DOI - 10.1088/1742-6596/573/1/012073

Subject(s) - penumbra , blocking (statistics) , beam (structure) , monte carlo method , optics , field (mathematics) , physics , materials science , computer science , mathematics , medicine , statistics , computer network , ischemia , pure mathematics , cardiology

Measurements of half-field beam penumbra were taken using EBT2 film for a variety of blocking techniques. It was shown that minimizing the SSD reduces the penumbra as the effects of beam divergence are diminished. The addition of a lead block directly on the surface provides optimal results with a 10-90% penumbra of 0.53 ± 0.02 cm. To resolve the uncertainties encountered in film measurements, future Monte Carlo measurements of halffield penumbras are to be conducted

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