Study of Properties of Helium-Based Gas Mixtures for Use ofLow Momentum and High Precision Measurement in Drift Chambers

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Chen Chang, Zhang Qinjian, Ma Jimao, Huang Xiuping, Yi Kai and Zheng Shuchen. Study of Properties of Helium-Based Gas Mixtures for Use ofLow Momentum and High Precision Measurement in Drift Chambers[J]. Chinese Physics C, 1998, 22(9): 787-794.
Chen Chang, Zhang Qinjian, Ma Jimao, Huang Xiuping, Yi Kai and Zheng Shuchen. Study of Properties of Helium-Based Gas Mixtures for Use ofLow Momentum and High Precision Measurement in Drift Chambers[J]. Chinese Physics C, 1998, 22(9): 787-794. shu
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Received: 1900-01-01
Revised: 1900-01-01
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Study of Properties of Helium-Based Gas Mixtures for Use ofLow Momentum and High Precision Measurement in Drift Chambers

    Corresponding author: Chen Chang,
  • Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing 100039

Abstract: Measured drift velocities using an uniform field drift chamber and multiplication factors obtained with proportional tubes in He-based gas mixtures He+CH4(80/20,70/30) and He+iC4H10 (85/15,80/20,70/30) are reported.The results are good agreement with calculations by Garfield Code. The Saturated drift velocity is Vd≈2.7cm/μs and multiplication factor of M≈104—105 at certain working voltage is manageable in He/CH4(80/20) gas mixture,and it is good candidate of working gas for use of low momentum and high precision measurement in the drift chambers.

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