TITLE:
Ionization Chamber Dosimetry for Conventional and Laser-Driven Clinical Hadron Beams
AUTHORS:
F. Scarlat, A. Scarisoreanu, E. Badita, C. Vancea, I. I. Calina, Fl. Scarlat, N. Verga
KEYWORDS:
Absorbed Dose to Water, Ionization Chamber, Hadron Therapy, Hadron Dosimetry, Expand Uncertainty
JOURNAL NAME:
Journal of Biosciences and Medicines,
Vol.3 No.4,
April
9,
2015
ABSTRACT: The practice of using the direct ionization
radiation (electrons, protons, antiprotons, pions, ions, etc) or of the indirect
ionization radiation (photons, neutrons, etc) in economy and social life has
led to the introduction of the absorbed dose magnitude (ICRU 1953) defined as
the energy absorbed per mass unit of the irradiated substance. This is a
fundamental magnitude valid for any type of ionizing radiation, any irradiated
material and any radiation energy. In case of clinical hadron beams generated
by conventional accelerators or those controlled by lasers, IAEA TRS 398
recommends the absorbed dose to water. This may be determined employing the calorimeter
method with water or graphite, chemical method, fluence based measurements as
Faraday cups or activation measurements, and the ionization chamber method. In
this paper the selected method was the thimble air filled ionization chamber
method for determination of absorbed dose to water.