PFMA-3, a dense Plasma Focus device, is being optimized as an X-ray generator. X-rays are obtained from the conversion of the electron beam emitted in the backward direction and driven to impinge on a 50 μm brass foil. Monte Carlo simulations of the X-ray emission have been conducted with MCNPX. The electron spectrum had been determined experimentally and is used in the present work as input to the simulations. Dose to the brass foil has been determined both from simulations and from measurements with a thermographic camera, and the two results are found in excellent agreement, thus validating further the electron spectrum assumed as well as the simulation set-up. X-ray emission has been predicted both from bremsstrahlung and from characteristic lines. The spectrum has been found to be comprised of two components of which the one at higher energy, 30÷70 keV, is most useful for IORT applications. The results are necessary to estimate penetration in and dose to Standard Human Tissue.
E. Ceccolini, F. Rocchi, D. Mostacci, M. Sumini, A. Tartari (2011). Monte Carlo Simulation of the Conversion X-Rays from the Electron Beam of PFMA-3. s.l : American Institute of Physics [10.1063/1.3665299].
Monte Carlo Simulation of the Conversion X-Rays from the Electron Beam of PFMA-3
MOSTACCI, DOMIZIANO;SUMINI, MARCO;
2011
Abstract
PFMA-3, a dense Plasma Focus device, is being optimized as an X-ray generator. X-rays are obtained from the conversion of the electron beam emitted in the backward direction and driven to impinge on a 50 μm brass foil. Monte Carlo simulations of the X-ray emission have been conducted with MCNPX. The electron spectrum had been determined experimentally and is used in the present work as input to the simulations. Dose to the brass foil has been determined both from simulations and from measurements with a thermographic camera, and the two results are found in excellent agreement, thus validating further the electron spectrum assumed as well as the simulation set-up. X-ray emission has been predicted both from bremsstrahlung and from characteristic lines. The spectrum has been found to be comprised of two components of which the one at higher energy, 30÷70 keV, is most useful for IORT applications. The results are necessary to estimate penetration in and dose to Standard Human Tissue.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
