Experimental Study of a Small-Cell drift Chamber Operated with Helium-Based Gases

LIU Jian-Bei; CHEN Chang; CHEN Yuan-Bai; JIN Yan; LIU Rong-Guang; MA Xiao-Yan; MA Yuan-Yuan; QIN Zhong-Hua; TANG Xiao; WANG Lan; WU Ling-Hui; XU Mei-Hang; ZHU Min

Chinese Physics C> 2005, Vol. 29> Issue(4) : 387-392

Experimental Study of a Small-Cell drift Chamber Operated with Helium-Based Gases

Institute of High Energy Physics,CAS,Beijing 100049,China2 Graduate School of the CAS,Beijing 100049,China

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Abstract：
The performance of a small–cell drift chamber operated with two helium–based gas mixtures, he/c_3h_8(60/40) and he/ch_4(60/40), was studied using cosmic rays, respectively. the gas mixture ar/co_2/ch_4(89/10/1) was also tested for comparison. the spatial resolution and de/dx resolution of the helium–based gases are better than those of ar/co_2/ch_4(89/10/1). a good spatial resolution of 110μm and a de/dx resolution of 6%–7% with 30–40 samples were obtained with he/c_3h_8(60/40).

References

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LIU Jian-Bei, CHEN Chang, CHEN Yuan-Bai, JIN Yan, LIU Rong-Guang, MA Xiao-Yan, MA Yuan-Yuan, QIN Zhong-Hua, TANG Xiao, WANG Lan, WU Ling-Hui, XU Mei-Hang, ZHU Min and Experimental Study of a Small-Cell drift Chamber Operated with Helium-Based Gases[J]. Chinese Physics C, 2005, 29(4): 387-392.

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Received: 2004-09-02
Revised: 1900-01-01

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