Neutron Doses Due to Beam Losses in a Novel Concept of a Proton Therapy Gantry

Talanov, Vadim; Kiselev, Daniela; Meer, David; Rizzoglio, Valeria; Schippers, Jacobus; Seidel, Mike; Wohlmuther, Michael

doi:10.18429/JACoW-IPAC2017-THPVA123

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RIS citation export for THPVA123: Neutron Doses Due to Beam Losses in a Novel Concept of a Proton Therapy Gantry

TY - CONF
AU - Talanov, V.
AU - Kiselev, D.C.
AU - Meer, D.
AU - Rizzoglio, V.
AU - Schippers, J.M.
AU - Seidel, M.
AU - Wohlmuther, M.
ED - Schaa, Volker RW
ED - Arduini, Gianluigi
ED - Pranke, Juliana
ED - Seidel, Mike
ED - Lindroos, Mats
TI - Neutron Doses Due to Beam Losses in a Novel Concept of a Proton Therapy Gantry
J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017
C1 - Copenhagen, Denmark
T2 - International Particle Accelerator Conference
T3 - 8
LA - english
AB - 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.
PB - JACoW
CP - Geneva, Switzerland
SP - 4736
EP - 4739
KW - neutron
KW - proton
KW - simulation
KW - beam-losses
KW - dipole
DA - 2017/05
PY - 2017
SN - 978-3-95450-182-3
DO - 10.18429/JACoW-IPAC2017-THPVA123
UR - http://jacow.org/ipac2017/papers/thpva123.pdf
ER -