中国物理B ›› 2008, Vol. 17 ›› Issue (10): 3644-3648.doi: 10.1088/1674-1056/17/10/019

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A CVD diamond film detector for pulsed proton detection

王 兰1, 金永杰1, 范如玉2, 欧阳晓平3, 吕反修4, 张忠兵5, 潘洪波5, 刘林月5, 卜忍安6   

  1. (1)Department of Engineering Physics, Tsinghua University, Beijing 100084, China; (2)Department of Engineering Physics, Tsinghua University, Beijing 100084, China;Northwest Institute of Nuclear Technology, Xi'an { rm 710024, China; (3)Department of Engineering Physics, Tsinghua University, Beijing 100084, China;Northwest Institute of Nuclear Technology, Xi'an { rm 710024, China;Xi'an Jiaotong University, Xi'an 710049, China; (4)Material College, Beijing University of Science and Tech
  • 收稿日期:2007-08-15 修回日期:2008-05-27 出版日期:2008-10-20 发布日期:2008-10-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10675074).

A CVD diamond film detector for pulsed proton detection

Wang Lan(王兰)a)†, Ouyang Xiao-Ping(欧阳晓平)a)b)d), Fan Ru-Yu(范如玉)a)b), Jin Yong-Jie(金永杰)a), Zhang Zhong-Bing(张忠兵)b), Pan Hong-Bo(潘洪波)b), Liu Lin-Yue(刘林月)b), Lü Fan-Xiu(吕反修)c), and Bu Ren-An(卜忍安)d)   

  1. a Department of Engineering Physics, Tsinghua University, Beijing 100084, China; b Northwest Institute of Nuclear Technology, Xi'an  710024, China; c Material College, Beijing University of Science and Technology, Beijing 100083, China; d Xi'an Jiaotong University, Xi'an 710049, China
  • Received:2007-08-15 Revised:2008-05-27 Online:2008-10-20 Published:2008-10-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10675074).

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摘要： A chemical vapour deposition (CVD) diamond film detector was prepared and the main characteristics for pulsed proton detection were studied at Beijing Tandem Accelerator. The result shows that the charge collection efficiency of the detector increases with increasing electric field intensity and reaches to 9.44{\%} at 5\,V/$\mu $m with the charge collection distance of 15.9\,$\mu $m. The relationship between the sensitivity of the detector and proton energy is consistent with the Monte Carlo (MC) simulation result. Its plasma time for a pulse with 4.85$\times $10$^{5}$ protons is 11.2ns. The dose threshold for onset of damage under 9MeV proton irradiation in the detector is about 10$^{13}$\,cm$^{ - 2}$. All of the results show that a CVD diamond detector has fast time response and high radiation hardness, and can be used in pulsed proton detection.

关键词: pulsed proton detection, CVD diamond film, semiconductor detector

Abstract: A chemical vapour deposition (CVD) diamond film detector was prepared and the main characteristics for pulsed proton detection were studied at Beijing Tandem Accelerator. The result shows that the charge collection efficiency of the detector increases with increasing electric field intensity and reaches to 9.44% at 5 V/$\mu $m with the charge collection distance of 15.9 $\mu $m. The relationship between the sensitivity of the detector and proton energy is consistent with the Monte Carlo (MC) simulation result. Its plasma time for a pulse with 4.85$\times $10$^{5}$ protons is 11.2ns. The dose threshold for onset of damage under 9MeV proton irradiation in the detector is about 10$^{13}$ cm$^{ - 2}$. All of the results show that a CVD diamond detector has fast time response and high radiation hardness, and can be used in pulsed proton detection.

Key words: pulsed proton detection, CVD diamond film, semiconductor detector

中图分类号:  (Solid-state detectors)

  • 29.40.Wk
81.15.Gh (Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.))