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Original Article

Korean Journal of Medical Physics 2004; 15(3): 121-127

Published online September 25, 2004

Copyright © Korean Society of Medical Physics.

Calculation of Trajectory for High Energy Electrons in Water under Strong Magnetic Fields

강자기장이 인가된 물 속에서 고에너지 전자의 궤적 계산

Dong Hyeok Jeong*, Jeung Kee Kim, Young Kee Oh, Kyo Chul Shin§, Ki Hwan Kim,Jhin Kee Kim, Sung Kyu Kim#, Tae Ik Ro, Jin Young Kim*, and Young Hun Ji**

정동혁*·김정기·오영기·신교철§·김기환·김진기·김성규#·노태익·김진영*·지영훈**

*Department of Physics, Kunsan National University, Gunsan, Korea, Department of Physics, Dong-A University, Busan, Korea, Department of Radiation Oncology, Eulji University Hospital, Daejeon, Korea, §Department of Radiation Oncology, Dankook University Hospital, Chonan, Korea,Department of Radiation Oncology, Chungnam National University Hospital, Daejeon, Korea, Research Institute of Clinical Medicine, Chonbuk National University, Jeonju, Korea, #Department of Radiation Oncology, Yeungnam University Hospital, Daegu, Korea, **Department of Radiation Oncology, Korea, Institute of Radiological and Medical Sciences, Seoul, Korea

*군산대학교 물리학과, 동아대학교 물리학과, 을지대학병원 방사선종양학과, §단국대학병원 방사선종양학과, 충남대학병원 방사선종양학과, 전북대학교 임상의학연구소, 영남대학병원 방사선종양학과, **원자력의학원 방사선종양학과

Abstract

The trajectories for high-energy electrons in water under magnetic fields were calculated approximately by numerical method. A differential equation for electrons under magnetic field was built and the calculation code was devised by Euler method. Using the code, the trajectories for electrons with energies of 3, 5, 10, and 15 MeV in water were calculated in the presence of magnetic fields parallel and perpendicular to the incident electrons. Since we considered only the energy loss and the directional change for primary electrons, there are errors in this calculation. However, based on the results we were able to explain the variation of dose distributions by the external magnetic fields in water.

KeywordsElectron trajectory, Magnetic field

Korean Society of Medical Physics

Vol.35 No.3
September 2024

pISSN 2508-4445
eISSN 2508-4453
Formerly ISSN 1226-5829

Frequency: Quarterly

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