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

Chen Chang; Zhang Qinjian; Ma Jimao; Huang Xiuping; Yi Kai; Zheng Shuchen

Chinese Physics C> 1998, Vol. 22> Issue(9) : 787-794

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

Institute of High Energy Physics, The Chinese Academy of Sciences, Beijing 100039

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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.

References

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BaBar Coll.Technical Design Report,SLAC-R-95-457,May1995[2]Belle Coll.Technical Design Report KEK report95-2,Apr1995[3]KLOE Coll.The KLOE Centrl Drift Chamber,LNF_94/028（IR）3,Giugno,1994[4]BTCF Coll.Feasibility Study Reporton Beijing Tau-Charm Factor,IHEP-BTCF,Report03,Oct,1996[5]Zimmermann Z et al.Nucl.Instr.Methods,1986,A243:86[6]CindroV et al.Nucl.Instr.Methods,1991,A389:4ll;Yadigarolu I-A et al Nucl Instr Methods,1992,A323:322[7]Boyarlski A et al.Nucl.Instr.Methods,1992,A323:267[8]Uno Setal.Nucl.Instr.Methods,1993,A330:55[9]Bernadini P et al.Nucl.Instr.Methods1995,A355:428[10]Arefiev A et al.Nucl.Instr.Methods,1989,A275:71[11]Ma J M et al.MIT Lab.Nucl.Sci.Technical Report No.129,Oct22,1982[l2]Veenh of Q R（Garfield,A Drift Chamber Simulation Program,CERN[13]Marechal B,Silva Da Costa M.Nucl.Instr Methods,1986,A243:148[14]Sharma A,SauliF.Nucl.Instr.Methods,1994,A350:470[15]Penning F M.Physica,1934,1:1028[16]Zarubin A V.Nucl.Instr.Methods,1989,A283:409

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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.

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1998-09-05

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.