• Title/Summary/Keyword: beamline

Search Result 82, Processing Time 0.025 seconds

Design of HUST-PTF beamline control system for fast energy changing

  • Li, Peilun;Li, Dong;Qin, Bin;Zhou, Chong;Han, Wenjie;Liao, Yicheng;Chen, Aote
    • Nuclear Engineering and Technology
    • /
    • v.54 no.8
    • /
    • pp.2852-2858
    • /
    • 2022

  • A proton therapy facility is under development at Huazhong University of Science and Technology (HUST). To meet the need for fast energy changes during treatments, a beamline control system (BCS) has been designed and implemented. The BCS coordinates and controls various beamline devices by adopting a distributed architecture divided into three layers: the client, server, and device layers. Among these, the design of the server layer is the key to realize fast energy changes. The server layer adopts the submodule programming paradigm and optimizes the data interface among modules, allowing the main workflow to be separated from the device workflow and data. Furthermore, this layer uses asynchronous, multithreaded, and thread-locking methods to improve the system's ability to operation efficiently and securely. Notably, to evaluate the changing energy status over time, a dynamic node update method is adopted, which can dynamically adjust the update frequency of variable nodes. This method not only meets the demand for fast updates on energy changes but also reduces the server's communication load in the steady state. This method is tested on a virtual platform, and the results are as expected.

  • https://doi.org/10.1016/j.net.2022.02.023 인용 PDF KSCI

Start-to-end modeling and transmission efficiency optimization for a cyclotron-based proton therapy beamline

  • Yu Chen;Bin Qin;Xu Liu;Wei Wang;Yicheng Liao
    • Nuclear Engineering and Technology
    • /
    • v.56 no.10
    • /
    • pp.4365-4374
    • /
    • 2024

  • Utilizing first-order beam dynamics models is adequate for studying the beam properties during the conceptual design of a cyclotron-based proton therapy beamline. After finishing lattice design, particle-matter interaction simulations for passive elements (e.g., degrader, collimators, energy slit) are required. The cascade simulation is used for lattice updates in each iteration, which is complicated. In addition, when the models involve particle tracking and particle-matter interaction, their optimization process is time-consuming. Therefore, this study proposes a start-to-end modeling method using Monte Carlo Beam Delivery Simulation (BDSIM) software that considers more realistic factors, such as particle-matter interaction and the realistic vacuum chamber, to precisely evaluate working parameters, along with an efficient optimization method that utilizes multi-objective Bayesian optimization (MOBO) to improve transmission efficiency. Taking the Huazhong University of Science and Technology proton therapy facility (HUST-PTF) as an example, beam loss along the beamline is located, quantified, and subsequently reduced by tuning the quadrupole strengths based on MOBO. The results show that: (i) By considering the particle-matter interaction and the realistic vacuum chamber, the precision in the prediction of the beam properties is improved; (ii) After optimization, the transmission efficiency of the entire beamline is relatively increased by an average of 6.52 % under different energy settings, especially 11.39 % at 70 MeV.

  • https://doi.org/10.1016/j.net.2024.05.041 인용 PDF