The effect of geometry dependent Chamber Spatial Response Function in small field profile measurements.
Appl Radiat Isot
; 189: 110412, 2022 Nov.
Article
en En
| MEDLINE
| ID: mdl-36029639
ABSTRACT
The effect of Chamber-Spatial Response Function (CSRF) on beam profile measurements has been studied for Standard Ionization Chamber-Radiation Field Analyzer setup. The Chamber-Spatial Response Function is assumed to be Gaussian and parameterized through the projected geometry of the chamber along the measurement axis. CSRF widths was measured by constructing chamber diameter-FWHM correlation for a set of ionization chambers. The results were analyzed through Geant4 simulations. The geometrical parameters for the chamber, used in Geant4 simulation, have been derived from the CT scan images of the chamber. An excellent agreement between measurement and simulation is obtained. Various factors effecting the CSRF, such as chamber width and Compton current are analyzed. The analysis shows that the Compton current has significant role in broadening the CSRF. Further, it is also observed that a spherical chamber geometry provides better and compact CSRF.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Radiometría
Tipo de estudio:
Health_economic_evaluation
/
Prognostic_studies
Idioma:
En
Revista:
Appl Radiat Isot
Asunto de la revista:
MEDICINA NUCLEAR
/
SAUDE AMBIENTAL
Año:
2022
Tipo del documento:
Article
País de afiliación:
India