SU-E-T-590: Optimizing Magnetic Field Strengths with Matlab for An Ion-Optic System in Particle Therapy Consisting of Two Quadrupole Magnets for Subsequent Simulations with the Monte-Carlo Code FLUKA

Baumann, K; Weber, U; Simeonov, Y; Zink, K

doi:10.1118/1.4924953

Title: SU-E-T-590: Optimizing Magnetic Field Strengths with Matlab for An Ion-Optic System in Particle Therapy Consisting of Two Quadrupole Magnets for Subsequent Simulations with the Monte-Carlo Code FLUKA

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Abstract

Purpose: Aim of this study was to optimize the magnetic field strengths of two quadrupole magnets in a particle therapy facility in order to obtain a beam quality suitable for spot beam scanning. Methods: The particle transport through an ion-optic system of a particle therapy facility consisting of the beam tube, two quadrupole magnets and a beam monitor system was calculated with the help of Matlab by using matrices that solve the equation of motion of a charged particle in a magnetic field and field-free region, respectively. The magnetic field strengths were optimized in order to obtain a circular and thin beam spot at the iso-center of the therapy facility. These optimized field strengths were subsequently transferred to the Monte-Carlo code FLUKA and the transport of 80 MeV/u C12-ions through this ion-optic system was calculated by using a user-routine to implement magnetic fields. The fluence along the beam-axis and at the iso-center was evaluated. Results: The magnetic field strengths could be optimized by using Matlab and transferred to the Monte-Carlo code FLUKA. The implementation via a user-routine was successful. Analyzing the fluence-pattern along the beam-axis the characteristic focusing and de-focusing effects of the quadrupole magnets could be reproduced. Furthermore themore »« less

Authors:

Baumann, K; Weber, U; Simeonov, Y ^[1]; Zink, K ^[1]

Institute of Medical Physics and Radiation Protection (IMPS), Giessen, DE (Germany)

Publication Date:: Mon Jun 15 00:00:00 EDT 2015

OSTI Identifier:: 22496303

Resource Type:: Journal Article

Journal Name:: Medical Physics

Additional Journal Information:: Journal Volume: 42; Journal Issue: 6; Other Information: (c) 2015 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-2405

Country of Publication:: United States

Language:: English

Subject:: 62 RADIOLOGY AND NUCLEAR MEDICINE; EQUATIONS OF MOTION; IMPLEMENTATION; MAGNETIC FIELDS; MAGNETS; MEV RANGE 10-100; MONTE CARLO METHOD; OPTIMIZATION; PARTICLE BEAMS; RADIOTHERAPY; SIMULATION

Citation Formats


                    Baumann, K, Weber, U, Simeonov, Y, Zink, K, and Department of Radiotherapy and Radiooncology, University Medical Center Giessen-Marburg, Marburg, DE. SU-E-T-590: Optimizing Magnetic Field Strengths with Matlab for An Ion-Optic System in Particle Therapy Consisting of Two Quadrupole Magnets for Subsequent Simulations with the Monte-Carlo Code FLUKA.  United States: N. p., 2015. 
        Web.  doi:10.1118/1.4924953.

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                    Baumann, K, Weber, U, Simeonov, Y, Zink, K, & Department of Radiotherapy and Radiooncology, University Medical Center Giessen-Marburg, Marburg, DE. SU-E-T-590: Optimizing Magnetic Field Strengths with Matlab for An Ion-Optic System in Particle Therapy Consisting of Two Quadrupole Magnets for Subsequent Simulations with the Monte-Carlo Code FLUKA.  United States.  https://doi.org/10.1118/1.4924953

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                    Baumann, K, Weber, U, Simeonov, Y, Zink, K, and Department of Radiotherapy and Radiooncology, University Medical Center Giessen-Marburg, Marburg, DE. 2015.  
        "SU-E-T-590: Optimizing Magnetic Field Strengths with Matlab for An Ion-Optic System in Particle Therapy Consisting of Two Quadrupole Magnets for Subsequent Simulations with the Monte-Carlo Code FLUKA".  United States.  https://doi.org/10.1118/1.4924953.

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@article{osti_22496303,

  title        = {SU-E-T-590: Optimizing Magnetic Field Strengths with Matlab for An Ion-Optic System in Particle Therapy Consisting of Two Quadrupole Magnets for Subsequent Simulations with the Monte-Carlo Code FLUKA},

  author       = {Baumann, K and Weber, U and Simeonov, Y and Zink, K and Department of Radiotherapy and Radiooncology, University Medical Center Giessen-Marburg, Marburg, DE},

  abstractNote = {Purpose: Aim of this study was to optimize the magnetic field strengths of two quadrupole magnets in a particle therapy facility in order to obtain a beam quality suitable for spot beam scanning. Methods: The particle transport through an ion-optic system of a particle therapy facility consisting of the beam tube, two quadrupole magnets and a beam monitor system was calculated with the help of Matlab by using matrices that solve the equation of motion of a charged particle in a magnetic field and field-free region, respectively. The magnetic field strengths were optimized in order to obtain a circular and thin beam spot at the iso-center of the therapy facility. These optimized field strengths were subsequently transferred to the Monte-Carlo code FLUKA and the transport of 80 MeV/u C12-ions through this ion-optic system was calculated by using a user-routine to implement magnetic fields. The fluence along the beam-axis and at the iso-center was evaluated. Results: The magnetic field strengths could be optimized by using Matlab and transferred to the Monte-Carlo code FLUKA. The implementation via a user-routine was successful. Analyzing the fluence-pattern along the beam-axis the characteristic focusing and de-focusing effects of the quadrupole magnets could be reproduced. Furthermore the beam spot at the iso-center was circular and significantly thinner compared to an unfocused beam. Conclusion: In this study a Matlab tool was developed to optimize magnetic field strengths for an ion-optic system consisting of two quadrupole magnets as part of a particle therapy facility. These magnetic field strengths could subsequently be transferred to and implemented in the Monte-Carlo code FLUKA to simulate the particle transport through this optimized ion-optic system.},

  doi          = {10.1118/1.4924953},

  url          = {https://www.osti.gov/biblio/22496303},
  journal      = {Medical Physics},

  issn         = {0094-2405},

  number       = 6,

  volume       = 42,

  place        = {United States},

  year         = {Mon Jun 15 00:00:00 EDT 2015},

  month        = {Mon Jun 15 00:00:00 EDT 2015}

}

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