TY - CONF AU - Ramoisiaux, E. AU - Boogert, S.T. AU - Dantinne, R. AU - Gnacadja, E. AU - Hernalsteens, C. AU - Musibau, S. AU - Ndihokubwayo, B. AU - Nevay, L.J. AU - Pauly, N. AU - Shields, W. AU - Tesse, R. AU - Vanwelde, M. ED - Biedron, Sandra ED - Simakov, Evgenya ED - Milton, Stephen ED - Anisimov, Petr M. ED - Schaa, Volker R.W. TI - Realistic CAD-Based Geometries for Arbitrary Magnets with Beam Delivery Simulation (BDSIM) J2 - Proc. of NAPAC2022, Albuquerque, NM, USA, 07-12 August 2022 CY - Albuquerque, NM, USA T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - Monte Carlo simulations are required to evaluate beam losses and secondary radiation accurately in particle accelerators and beamlines. Detailed CAD geometries are critical to account for a realistic distribution of material masses but increase the model complexity and often lead to code duplication. Beam Delivery Simulation (BDSIM) and the Python package pyg4ometry enable handling such accelerator models within a single, simplified workflow to run complete simulations of primary and secondary particle tracking and interactions with matter using Geant4 routines. Additional capabilities have been developed to model arbitrary bent magnets by associating externally modeled geometries to the magnet poles, yoke, and beampipe. Individual field descriptions can be associated with the yoke and vacuum pipe separately to provide fine-grained control of the magnet model. The implementation of these new features is described in detail and applied to the modeling of the CERN Proton Synchrotron (PS) combined function magnets. PB - JACoW Publishing CP - Geneva, Switzerland SP - 55 EP - 58 KW - vacuum KW - extraction KW - simulation KW - synchrotron KW - proton DA - 2022/10 PY - 2022 SN - 2673-7000 SN - 978-3-95450-232-5 DO - doi:10.18429/JACoW-NAPAC2022-MOPA01 UR - https://jacow.org/napac2022/papers/mopa01.pdf ER - TY - CONF AU - Ramoisiaux, E. AU - Gnacadja, E. AU - Hernalsteens, C. AU - Pauly, N. AU - Tesse, R. AU - Vanwelde, M. ED - Biedron, Sandra ED - Simakov, Evgenya ED - Milton, Stephen ED - Anisimov, Petr M. ED - Schaa, Volker R.W. TI - Activation of the IBA Proteus One Proton Therapy Beamline Using BDSIM and FISPACT-II J2 - Proc. of NAPAC2022, Albuquerque, NM, USA, 07-12 August 2022 CY - Albuquerque, NM, USA T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - Cyclotron-based proton therapy systems generate large fluxes of secondary particles due to the beam interactions with the beamline elements, with the energy degrader being the dominant source. Compact systems exacerbate these challenges for concrete shielding and beamline element activation. Our implementation of the Rigorous Two-Step method uses Beam Delivery Simulation (BDSIM), a Geant4-based particle tracking code, for primary and secondary particles transport and fluence scoring, and FISPACT-II for time-dependent nuclear inventory and solving the rate equations. This approach is applied to the Ion Beam Applications (IBA) Proteus®ONE (P1) system, for which a complete model has been built, validated, and used for shielding activation simulations. We detail the first simulations of the activation on quadrupole magnets in high-fluence locations downstream of the degrader. Results show the evolution of the long-lived nuclide concentrations for short and long timescales throughout the facility lifetime for a typical operation scenario. PB - JACoW Publishing CP - Geneva, Switzerland SP - 59 EP - 62 KW - proton KW - neutron KW - shielding KW - radiation KW - simulation DA - 2022/10 PY - 2022 SN - 2673-7000 SN - 978-3-95450-232-5 DO - doi:10.18429/JACoW-NAPAC2022-MOPA02 UR - https://jacow.org/napac2022/papers/mopa02.pdf ER -