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Definition of source for head shielding requirements in linear accelerators may affect room shielding design
Author(s) -
Herman Martin W.,
Dockter Arden E.,
Scallon Joseph E.
Publication year - 1980
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.594768
Subject(s) - electromagnetic shielding , linear particle accelerator , siemens , dosimetry , radiation , nuclear engineering , beam (structure) , medical physics , physics , nuclear medicine , optics , electrical engineering , engineering , medicine
Siemens Corporation defines the source of the Mevatron 20 linear accelerator as a line source approximately 2 m in length. Calculations for secondary barriers for leakage radiation are generally based on 0.1% of the useful beam 1 m from the target. The difference in source terms can lead to calculating thinner barriers than are required. The placement of a 30×10×10‐cm block of lead behind the head was required to achieve acceptable radiation levels.