Adaptive tree multigrids and simplified spherical harmonics approximation in deterministic neutral and charged particle transport

Dissertation

Research output: ThesisDissertationCollection of Articles

2 Citations (Scopus)

Abstract

A new deterministic three-dimensional neutral and charged particle transport code, MultiTrans, has been developed. In the novel approach, the adaptive tree multigrid technique is used in conjunction with simplified spherical harmonics approximation of the Boltzmann transport equation. The development of the new radiation transport code started in the framework of the Finnish boron neutron capture therapy (BNCT) project. Since the application of the MultiTrans code to BNCT dose planning problems, the testing and development of the MultiTrans code has continued in conventional radiotherapy and reactor physics applications. In this thesis, an overview of different numerical radiation transport methods is first given. Special features of the simplified spherical harmonics method and the adaptive tree multigrid technique are then reviewed. The usefulness of the new MultiTrans code has been indicated by verifying and validating the code performance for different types of neutral and charged particle transport problems, reported in separate publications.

Original languageEnglish
QualificationDoctor Degree
Awarding Institution
  • University of Helsinki
Supervisors/Advisors
  • Hiismäki, Pekka, Supervisor, External person
  • Savolainen, Sauli, Supervisor, External person
Award date9 Jun 2007
Publisher
Print ISBNs978-951-38-7016-4
Electronic ISBNs978-951-38-7017-1
Publication statusPublished - 1 Dec 2007
MoE publication typeG5 Doctoral dissertation (article)

Fingerprint

Charged particles
Boron
Neutrons
Radiation
Radiotherapy
Physics
Planning
Testing

Keywords

  • BNCT
  • Boron neutron capture therapy
  • MultiTrans
  • Particle transport
  • Radiation transport
  • Radiotherapy
  • Reactor physics
  • Simplified spherical harmonics
  • Tree multigrid

Cite this

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abstract = "A new deterministic three-dimensional neutral and charged particle transport code, MultiTrans, has been developed. In the novel approach, the adaptive tree multigrid technique is used in conjunction with simplified spherical harmonics approximation of the Boltzmann transport equation. The development of the new radiation transport code started in the framework of the Finnish boron neutron capture therapy (BNCT) project. Since the application of the MultiTrans code to BNCT dose planning problems, the testing and development of the MultiTrans code has continued in conventional radiotherapy and reactor physics applications. In this thesis, an overview of different numerical radiation transport methods is first given. Special features of the simplified spherical harmonics method and the adaptive tree multigrid technique are then reviewed. The usefulness of the new MultiTrans code has been indicated by verifying and validating the code performance for different types of neutral and charged particle transport problems, reported in separate publications.",
keywords = "BNCT, Boron neutron capture therapy, MultiTrans, Particle transport, Radiation transport, Radiotherapy, Reactor physics, Simplified spherical harmonics, Tree multigrid",
author = "Petri Kotiluoto",
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day = "1",
language = "English",
isbn = "978-951-38-7016-4",
series = "VTT Publications",
publisher = "VTT Technical Research Centre of Finland",
number = "639",
address = "Finland",
school = "University of Helsinki",

}

Adaptive tree multigrids and simplified spherical harmonics approximation in deterministic neutral and charged particle transport : Dissertation. / Kotiluoto, Petri.

VTT Technical Research Centre of Finland, 2007. 106 p.

Research output: ThesisDissertationCollection of Articles

TY - THES

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