Background: The dosimetric parameters required in lung cancer radiation therapy are taken from a homogeneous water phantom; however, during treatment, the expected results are being affected because of its inhomogeneity. Therefore, it becomes necessary to quantify these deviations.Objective: The present study has been undertaken to find out inter- and intra- lung density variations and its dosi...

Every 10 s, the antiproton-production-target will be bombarded by a pulse of 2×10 primary protons with an energy of 29 GeV (for an overview see [1]). This corresponds to a total beam power of about 10 kW. After passing of the first dipole primary protons and antiprotons are no longer in-line and the primaries have to be dumped. Behind the target a significant part of the beam power is carried b...

I In this repork we discuss the theory of the "candens& brstory tduique", an approximate mlutioa to the Boltzmam traaqmrt equation that sums tbe dect of up to thousands of d k c t e , small momturn transfer elastic and inch& collisions into single hgert&ct quasitvtnb. Tbis technique saves much ealcdationa1 effort at the expense of introducing errors that arc now understood quantitatirey in term...

The results from a study on the behavior of the GEANT 3.21 Monte Carlo program are presented. The purpose was to study the diierent options available for hadronic interactions, and where possible to compare with data. and ? hadrons were studied at discrete momenta from 100 MeV/c to 1.0 GeV/c. The main conclusion is that the hadronic package currently employed in the CBGEANT Monte Carlo is wrong...

We determined the distribution of activation products inside magnet coils a medical cyclotron that has been operational for fifteen years. Besides FLUKA, we based our approach on new software tools (RAW and ActiWiz) developed high-energy accelerators at CERN. A combined analysis measurements with Monte-Carlo simulations resulted in detailed three-dimensional radiological characterisation coils....