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A scintillating fiber beam‐energy monitor for electron beam therapy
Author(s) -
Aoyama Takahiko,
Maekoshi Hisashi,
Tsuzaka Masatoshi,
Koyama Shuji
Publication year - 1995
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 - 10.1118/1.597499
Subject(s) - photodiode , linear particle accelerator , beam (structure) , wedge (geometry) , optics , cathode ray , energy (signal processing) , radiation , electron , physics , materials science , nuclear physics , quantum mechanics
A new type of beam‐energy monitor is described, which has been developed to check the energies of electron beams from radiotherapy accelerators. The monitor consists of a pair of scintillating fibers and photodiode read‐out circuits that measure the energy dependence of electron transmission through a wedge‐shaped absorber. A linear energy response and 1% accuracy for energy constancy measurements are attained with the monitor. The monitor having advantages of simple mechanical and electronic constructions, small size, and low cost is suitable for practical use as a portable device.