Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (08): 80403-080403.doi: 10.11889/j.0253-3219.2014.hjs.37.080403

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

Development of a heavy ion track imaging detector and its preliminary experimental test

YAN Siqi1,2 LU Xiaolong1 DANG Bingrong2 DUAN Limin2 LI Wenjian2 LI Zhankui2 SONG Haihong2 YAN Yan1 WEI Zheng1 WANG Jie1 WANG Junrun1 YAO Zeen1   

  1. 1(School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China) 2(Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China)
  • Received:2014-03-10 Revised:2014-05-05 Online:2014-08-10 Published:2014-07-22

Abstract: Background: Heavy ion track is one kind of very important information for diotherapy study. Purpose: The aim is to study the spatial distribution of the heavy ions energy deposition when they pass through certain matter, especially the biological tissue. Methods: A heavy ion track imaging detector system which is based on gas avalanche chamber and charge-coupled device (CCD) optical readout system was developed. Preliminary experimental test was performed, in which α particle radiated from 239Pu was used as the incident particle. Results: α particle track imaging was achieved successfully. It is found that α particle track is closely related to the gas pressure in the avalanche chamber and the exposure time of the CCD camera. According to analyzing the data of α particle track under the condition of gas pressure equivalent to 15 hPa and exposure time equivalent to 10 s, it is proved that the track structure is axisymmetric. With incident depth increasing, the track spread decreases gradually, and the image points density increases. Conclusion: We developed the heavy ion track imaging detector system which can achieve α particle track imaging successfully, and some preliminary law of charged particle track can be found.

Key words: Heavy ion track, Gas avalanche chamber, TEA (triethylamine), CCD (charge-coupled device) optical readout system