Paper |
Title |
Page |
THPVA123 |
Neutron Doses Due to Beam Losses in a Novel Concept of a Proton Therapy Gantry |
4736 |
|
- V. Talanov, D.C. Kiselev, D. Meer, V. Rizzoglio, J.M. Schippers, M. Seidel, M. Wohlmuther
PSI, Villigen PSI, Switzerland
|
|
|
A novel design of a gantry for proton therapy is investigated in which a degrader and emittance limiting collimators are mounted on the gantry. Due to the interactions of protons in these components there will be an additional neutron dose at the location where a patient is positioned during a proton therapy. The results of numerical study of this additional dose are presented. Neutron prompt dose at the patient position is estimated through the Monte Carlo simulation using the MCNPX 2.7.0 particle transport code. Secondary neutron and photon fluxes from the distinct beam loss points are taken into consideration and the resulting dose is calculated using realistic estimates of beam losses. The dependence of the dose on the beam energy and individual impacts of each loss point on the total dose at the patient position as well as on critical beam line components are estimated and potential design constraints are discussed. It has been found that compared with a conventional gantry the expected additional dose is higher but the optimization of the beam line configuration and additional shielding shall help to reduce the dose to an acceptable value.
|
|
DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA123
|
|
Export • |
reference for this paper using
※ BibTeX,
※ LaTeX,
※ Text/Word,
※ RIS,
※ EndNote (xml)
|
|
|
THPVA124 |
Simulations and Measurements of Proton Beam Energy Spectrum After Energy Degradation |
4740 |
|
- A. Gerbershagen, A. Adelmann, R. Dölling, D. Meer, V. Rizzoglio, J.M. Schippers
PSI, Villigen PSI, Switzerland
|
|
|
At the proton therapy facility PROSCAN of the Paul Scherrer Institute the energy modulation of the cyclotron generated proton beam is performed via material insertion into the beam trajectory. The energy spectrum of the particles propagating forwards after such procedure has been simulated and measured. The current paper summarizes the results of these simulations and measurements and illustrates their significance for the future developments of a gantry for proton therapy at the Paul Scherrer Institute.
|
|
DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA124
|
|
Export • |
reference for this paper using
※ BibTeX,
※ LaTeX,
※ Text/Word,
※ RIS,
※ EndNote (xml)
|
|
|