Chinese Physics C > 2007, Vol. 31 > Issue(8): 787-791

Calculation of the Beam Loss in the 270° Bending Magnet System of the Medical Accelerator

Department of Engineering Physics, Tsinghua University, Beijing 100084, China

Abstract
HTML
Reference
Related

PDF

Abstract：
The transportation process of the electron beam in the 270° bending magnet system of the medical accelerator is studied under the one-order approximation, and the influence of the initial condition to the beam transportation and loss is analyzed for the calculation of the radiation dose. The theory of the beam transportation, combined with the Monte Carlo sampling method is applied. The simulation result shows that the energy spread is the main factor resulted in the beam loss. The data on the position, energy and direction of the lost electrons obtained through the simulation can be supplied as input to deal with the radiation problem. The result gives that the loss rate of the electron beam is 13.5%, and the direction of the main loss is toward the upside of the irradiating head of the accelerator with the radius 1mm, angle spread 5mrad, and energy spread 10% of the initial beam.

References

[1]

. WU Pin, LI Quan-Feng. J. Tsinghua Univ. (Sci. Tech.),2000, 40(10): 24-27(in Chinese)(吴频，李泉风.清华大学学报，2000, 40(10): 24-27)2. FANG Chun-Jiang. Application of Monte-Carlo Method inMedical Accelerator and Industrial CT. Master Disserta-tion of Tsinghua Univ., 2003(in Chinese)(方春江.蒙特卡罗方法在医用加速器及上业CT中的应用[硕士学位论文].北京:清华大学工程物理系，2003)3. GU Ben-Guang. Medical Accelerators. Beijing: SciencePress, 2003(in Chinese)(顾本广.医用加速器.北京:科学出版社，2003)4. GB 16369-1996 Radiological Health Standard for the Med-ical Electron Accelerators, 1996(in Chinese)(G B 16369-1996医用电子加速器放射卫生防护标准，1996)5. XU Shu-Yan. Application of Monte-Carlo Method in Ex-perimental Nuclear Physics. Beijing: Atomic Energy Press,1996.(in Chinese)(许淑艳.蒙特卡罗方法在实验核物理中的应用.北京:原子能出版社，1996)6. PEI Lu-Cheng, WANG Zhong-Qi. Monte-Carlo Methodand Its Applications. Beijing: Ocean Press, 1998(in Chinese)(裴鹿成，王仲奇.蒙特卡罗方法及其应用.北京:海洋出版社,1998)7. KONG Chao-Cheng. Radiation Physics Problem Calcula-tion and Research of Electron Linear Accelerator. MasterDissertation of Tsinghua Univ., 2006(in Chinese)(孔巢城.电子直线加速器中相关辐射物理问题的研究计算[硕士学位论文].北京:清华大学工程物理系，2006)8. XIA Hui-Qin, LIU Chun-Liang. Principles of the BeamTransportation. Xi'an Jiaotong Univ. Press, 1991. 101-125(in Chinese)(夏慧琴，刘纯亮.束流传输原理.西安交通大学出版社,1991.101-125)

[1]	ZHAO Xiao-Yan,CAO Jian-She,WANG Lin,YUE Jun-Hui,YE Qiang,SUI Yan-Feng,ZHAO Ying,MA Hui-Zhou,ZHAO Jing-Xia,ZHANG Guo-Qing,ZHAO Zheng,Zhang Lei. Beam Loss Monitoring System of BEPCⅡ and Its First Application. Chinese Physics C, 2008, 32(S1): 80-82.
[2]	JIA Xian-Lu,ZHANG Tian-Jue,LU Yin-Long,AI Chang-Jun,CHU Cheng-Jie,GUAN Feng-Ping,XING Jian-Sheng. Wobbling Magnet Design for Beam Line of CYCIAE-30 Medical Cyclotron. Chinese Physics C, 2007, 31(3): 292-295.
[3]	WANG Jin-Feng,WANG Yu-Ming,LI Xue-Qian. Breakdown of Entanglement During the Teleportation. Chinese Physics C, 2005, 29(1): 14-18.
[4]	WANG Jun-Hua,GONG Ding,LIU Jian-Hong,ZHENG Kai,YANG Yong-Liang,SUN Bao-Gen,LU Ping. Feedback Suppression of β Oscillation in Injection of HLS. Chinese Physics C, 2004, 28(4): 426-430.
[5]	ZHANG Yuan. Simulation of Beam-Beam Effects in BEPC. Chinese Physics C, 2004, 28(10): 1116-1120.
[6]	MA Lian-Liang,WANG Ping,ZHU Yong-Sheng,ZHANG Xue-Yao. Calculation and Simulation for the Initial State Radiation Correction in e+e-→ωπ0. Chinese Physics C, 2004, 28(10): 1021-1025.
[7]	MA Yun-Zhi,CAO Tian-Guang,ZHUO Yi-Zhong. Low Energy Electron Transportation Process in Water Media. Chinese Physics C, 2003, 27(4): 319-323.
[8]	QIAO Xiu-Mei,DUAN Chun-Gui,LI Guang-Lie. Nuclear Effect in p-A Drell-Yan Process. Chinese Physics C, 2002, 26(10): 1036-1040.
[9]	ZHU YaBo,YANG JianJun,LI GuangLie. Energy Loss In Nuclear Drell-Yan Process. Chinese Physics C, 2000, 24(6): 518-523.
[10]	Tang Jingyu,Lei Wen,Wang Yifang. Beam Loss in HIRFL-CSR Due to CollisionsWith Residual Gas in Vacuum. Chinese Physics C, 1998, 22(8): 745-754.
[11]	Li Yunde,Liu Lianshou. Production of Photon in Hard Photoproduction Processes at HERA. Chinese Physics C, 1996, 20(6): 505-513.
[12]	Li Yunde,liu lianshou. Two-Jet Production via Resolved Photon Processes at HERA. Chinese Physics C, 1996, 20(7): 601-609.
[13]	WU Ji-Min,ZHAO Pei-Ying. Analytic Approximation for Process e⁺+e^－→τ⁺+τ^－Cross Section Near Threshold. Chinese Physics C, 1993, 17(4): 379-383.
[14]	WU Ji-Min. A Rigorous Calculation for the Radiator in e⁺e^－Process. Chinese Physics C, 1993, 17(2): 146-151.
[15]	SA Ben-Hao,ZHENG Yu-Ming,ZHANG Xiao-Ze,LU Zhao-Qi,XU Shu-Yan,,. ON THE BEHAVIOR OF PHASE TRANSITION SHOWN IN DISASSYMBLY PROCESSES OF VERY HOT AND DILUTE FINITE NUCLEAR SYSTEMS. Chinese Physics C, 1989, 13(2): 142-147.
[16]	LIU Jian-Ye,LI Jun-Qing,QIAO Wei-Min,CHEN Pei-Jun,SHEN Wen-Qing,TAN Nan-Hong. THE SHELL EFFECTS IN HEAVY ION COLLISIONS FOR LOW BOBARDMENT ENERGIES. Chinese Physics C, 1988, 12(6): 840-847.
[17]	XU Min,ZENG Xiang-Tao,HUANG Kai-Ping,ZHANG Tian-Bao. EFFECT OF THE ENERGY LOSS PROCESS ON THE ANNIHILATION OF ORTHOPOSITRONIUM IN SILICA AEROGEL. Chinese Physics C, 1988, 12(4): 447-454.
[18]	SONG Xiao-Tong,CHEN Zheng. THE FORMATION CROSS SECTION FOR (dμ) ATOM IN RADIATIVE CAPTURE PROCESS. Chinese Physics C, 1986, 10(6): 647-655.
[19]	PEI Guo-Xi,ZHANG Wu,TIAN Bao-Ying,XU Jian-Ming. THE EDDY-CURRENT EFFECTS OF A BENDING MAGNET ON AN ELECTRON STORAGE RING DURING SLOW ACCELERATION. Chinese Physics C, 1986, 10(5): 578-582.
[20]	Wei Kai-yu,Lin Zhen-hua. A COMPUTATIONAL METHOD FOR THE DESIGN ENERGY HIGH INTENSITY BEAM TRANSPORT SYSTEMS. Chinese Physics C, 1980, 4(5): 555-562.

Access

Get Citation

LI Quan-Feng, KONG Chao-Cheng, GUO Bing-Qi and XING Qing-Zi. Calculation of the Beam Loss in the 270° Bending Magnet System of the Medical Accelerator[J]. Chinese Physics C, 2007, 31(8): 787-791.

LI Quan-Feng, KONG Chao-Cheng, GUO Bing-Qi and XING Qing-Zi. Calculation of the Beam Loss in the 270° Bending Magnet System of the Medical Accelerator[J]. Chinese Physics C, 2007, 31(8): 787-791. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2006-11-01
Revised: 2006-12-02

Article Metric

Article Views(4574)
PDF Downloads(676)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者:陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Calculation of the Beam Loss in the 270° Bending Magnet System of the Medical Accelerator

Corresponding author:LI Quan-Feng,

Department of Engineering Physics, Tsinghua University, Beijing 100084, China

Received Date:2006-11-01

Accepted Date:2006-12-02

Available Online:2007-08-05

Abstract:The transportation process of the electron beam in the 270° bending magnet system of the medical accelerator is studied under the one-order approximation, and the influence of the initial condition to the beam transportation and loss is analyzed for the calculation of the radiation dose. The theory of the beam transportation, combined with the Monte Carlo sampling method is applied. The simulation result shows that the energy spread is the main factor resulted in the beam loss. The data on the position, energy and direction of the lost electrons obtained through the simulation can be supplied as input to deal with the radiation problem. The result gives that the loss rate of the electron beam is 13.5%, and the direction of the main loss is toward the upside of the irradiating head of the accelerator with the radius 1mm, angle spread 5mrad, and energy spread 10% of the initial beam.

HTML

Reference (1)

Calculation of the Beam Loss in the 270° Bending Magnet System of the Medical Accelerator

Abstract：

References

Access

Article Metrics

Metrics

通讯作者:陈斌, bchen63@163.com

Email This Article