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 ›› 2019, Vol. 30 ›› Issue (6): 87 doi: 10.1007/s41365-019-0619-x


Energy calibration of a CR-39 nuclear-track detector irradiated by charged particles

Yue Zhang1,2 • Hong-Wei Wang1,3 • Yu-Gang Ma1,2,4 • Long-Xiang Liu1,3 • Xi-Guang Cao1,3 • Gong-Tao Fan1,3 • Guo-Qiang Zhang1,3 • De-Qing Fang1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2 University of Chinese Academy of Sciences, Beijing 100049, China
    3 Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
    4 ShanghaiTech University, Shanghai 201210, China
  • Received:2018-09-25 Revised:2019-03-25 Accepted:2019-04-03
  • Contact: Hong-Wei Wang
  • Supported by:
    This work was supported in part by the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDB160203) and the National Natural Science Foundation of China (Nos. 11875311, 11421505, and 11475245).
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Yue Zhang, Hong-Wei Wang, Yu-Gang Ma, Long-Xiang Liu, Xi-Guang Cao, Gong-Tao Fan, Guo-Qiang Zhang, De-Qing Fang. Energy calibration of a CR-39 nuclear-track detector irradiated by charged particles.Nuclear Science and Techniques, 2019, 30(6): 87     doi: 10.1007/s41365-019-0619-x

Abstract: Charged particle diagnosis is an important aspect of laser–plasma experiments conducted at super-intense laser facilities. In recent years, Columbia Resin #39 (CR-39) detectors have been widely employed for detecting charged particles in laser–plasma experiments. This is because the CR-39 polymer does not respond to electromagnetic pulses or X-rays. This study presents a method for calibrating the relationship between particle energy and track diameter in a CR-39 detector (TasTrak®) using 3–8 MeV protons, 6–30 MeV carbon ions, and 1–5 MeV alpha particles. The particle tracks were compared under the manufacturer’s recommended etching conditions of 6.25 mol/l NaOH at 98 °C and under the widely adopted experimental conditions of 6.25 mol/l NaOH at 70 °C. The results show that if the NaOH solution concentration is 6.25 mol/l, then the temperature of 70 °C is more suitable for etching proton tracks than 98 °C and employing a temperature of 98 °C to etch alpha-particle and carbon-ion tracks can significantly reduce the etching time. Moreover, this result implies that C3+ ion or alpha-particle tracks can be distinguished from proton tracks with energy above 3 MeV by controlling the etching time. This calibration method for the CR-39 detector can be applied to the diagnosis of reaction products in laser–plasma experiments.

Key words: CR-39 detector, Energy calibration, Bulk etch rate, Etching temperature