A hybrid structure gaseous detector for ion backflow suppression

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Yu-Lian Zhang, Hui-Rong Qi, Bi-Tao Hu, Hai-Yun Wang, Qun Ou-Yang, Yuan-Bo Chen, Jian Zhang and Zhi-Wen Wen. A hybrid structure gaseous detector for ion backflow suppression[J]. Chinese Physics C, 2017, 41(5): 056003. doi: 10.1088/1674-1137/41/5/056003
Yu-Lian Zhang, Hui-Rong Qi, Bi-Tao Hu, Hai-Yun Wang, Qun Ou-Yang, Yuan-Bo Chen, Jian Zhang and Zhi-Wen Wen. A hybrid structure gaseous detector for ion backflow suppression[J]. Chinese Physics C, 2017, 41(5): 056003.  doi: 10.1088/1674-1137/41/5/056003 shu
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Received: 2016-10-11
Revised: 2016-12-26
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    Supported by National Key Programme for ST Research and Development (2016YFA0400400) and by National Natural Science Foundation of China (11275224)

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A hybrid structure gaseous detector for ion backflow suppression

    Corresponding author: Hui-Rong Qi,
    Corresponding author: Bi-Tao Hu,
  • 1. School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
  • 2. State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China
  • 3. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 4. State Key Laboratory of Particle Detection and Electronics, Beijing 100049, China
  • 5. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 6.  School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
  • 7. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Fund Project:  Supported by National Key Programme for ST Research and Development (2016YFA0400400) and by National Natural Science Foundation of China (11275224)

Abstract: A new concept for a hybrid structure gaseous detector module with ion backflow suppression for the time projection chamber in a future circular collider is presented. It is a hybrid structure cascaded Gas Electron Multiplier (GEM) with a Micromegas detector. Both Micromegas and GEM have the capability to naturally reduce most of the ions produced in the amplification region. The GEM also acts as the preamplifer device and increases gas gain together with the Micromegas. Feasibility tests of the hybrid detector are performed using an 55Fe X-ray source. The energy resolution is better than 27% for 5.9keV X-rays. It is demonstrated that a backflow ratio better than 0.2% can be reached in the hybrid readout structure at a gain of 5000.

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