Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2009, Vol. 20 ›› Issue (3): 177-180 doi: 10.13538/j.1001-8042/nst.20.177-180


An online monitor ionization chamber used in particle therapy

TANG Bin1,2,* HU Zhengguo1 MAO Ruishi1 XU Zhiguo1,2 WANG Jiansong1 YUE Ke1,2 TU Xiaolin1,2 WU Dapeng1,2 CHEN Jinda1,2 ZHANG Jie1,2 WANG Meng1 SUN Zhiyu1 ZHANG Xueheng1,2 LI Qiang1 XU Hushan1 XIOA Guoqing1   

  1. 1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
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TANG Bin, HU Zhengguo, MAO Ruishi, XU Zhiguo, WANG Jiansong, YUE Ke. An online monitor ionization chamber used in particle therapy.Nuclear Science and Techniques, 2009, 20(3): 177-180     doi: 10.13538/j.1001-8042/nst.20.177-180


The clinical trials of tumor therapy using heavy ions beam 12C are now in progress at Institute of Modern Physics in Lanzhou. In order to achieve the precise radiotherapy with the high energy 12C beam in active pencil beam scanning mode, we have developed an ionization chamber(IC) as an online monitor for beam intensity and also a dosimeter after calibration. Through the choosing of working gas and voltage, optimizing of the electrics and the read-out system, calibrating the linearity, the detector system provide us one of the simple and highly reliable way to monitoring the beam during the active pencil beam scanning treatments. The measurement results of this detector system show that it could work well under the condition of high energy 12C beam in active pencil beam scanning mode.

Key words: Heavy ion beam therapy, Integral ionization chamber, Irradiation dose, Absorb dose