STRUCTURE DESIGN OF THE BEIJING SPECTROMETER III BEAM PIPE
Zheng, LF; Ji, Q; Wang, L; Li, XF; Xu, SW; Dong, SJ; Zhao, LB; Liu, JP; Zheng LF(郑莉芳); Ji Q(纪全); Li XF(李勋锋); Xu SW(徐绍旺)
刊名CHINESE JOURNAL OF MECHANICAL ENGINEERING
2008
卷号21期号:3页码:1-6
关键词Beam pipe Beijing spectrometer III Structure design Beijing electron and positron colliderII
学科分类Engineering
DOI10.3901/CJME.2008.03.001
通讯作者Zheng, LF (reprint author), Univ Sci & Technol Beijing, Sch Mech Engn, Beijing 100083, Peoples R China.
文章类型Article
英文摘要The Beijing spectrometer III (BESIII) beam pipe is in the center of the BESIII, which is the detector of the upgrade project of Beijing electron and positron collider (BEPC II). Electrons and positrons collide in the BESIII beam pipe. According to the demands of the BEPC II, a key program of Chinese Academy of Sciences, the BESIII beam pipe is designed based on the finite elements analysis, The BESIII beam pipe is installed in the inner cylinder of the BESIII drift chamber. As a vacuum tube, the BESIII beam pipe is designed as 1 000 mm in length, 63 mm in inner diameter and 114 mm in outer diameter, respectively. The BESIII beam pipe consists of a central beryllium pipe cooled by EDM-1, the oil No.1 for electric discharge machining, and two extended copper pipes cooled by deionized water (DW). The three parts are jointed by vacuum welding. Factors taken into account in the design are as follows. (1) The wall thickness of the central beryllium pipe should be designed as small as possible to reduce the multi-scattering and improve the particle momentum resolution. And the wall thickness of the extended copper pipe should be designed as large as possible to protect the detectors from the backgrounds. (2) The BESIII beam pipe must be sufficiently cooled to avoid the damage and prevents its influence to the BESIII drift chamber (DC) operation. The inner surface temperature of the DC inner cylinder must be maintained at 293 +/- 2 K. (3) The magnetic permeability of the materials used in the BESIII beam pipe must be less than 1.05 H/m to avoid large magnetic field distortions. (4) The static pressure of the vacuum chamber of the BESIII beam pipe must be less than 800 mu Pa. The simulating results show that the designed structure of the BESIII beam pipe satisfies the requirements mentioned above. The structure design scheme is evaluated and adopted by the headquarters of BEPC II.
类目[WOS]Engineering, Mechanical
收录类别SCI
WOS记录号WOS:000263228100001
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225420
专题中国科学院高能物理研究所_实验物理中心_期刊论文
推荐引用方式
GB/T 7714
Zheng, LF,Ji, Q,Wang, L,et al. STRUCTURE DESIGN OF THE BEIJING SPECTROMETER III BEAM PIPE[J]. CHINESE JOURNAL OF MECHANICAL ENGINEERING,2008,21(3):1-6.
APA Zheng, LF.,Ji, Q.,Wang, L.,Li, XF.,Xu, SW.,...&徐绍旺.(2008).STRUCTURE DESIGN OF THE BEIJING SPECTROMETER III BEAM PIPE.CHINESE JOURNAL OF MECHANICAL ENGINEERING,21(3),1-6.
MLA Zheng, LF,et al."STRUCTURE DESIGN OF THE BEIJING SPECTROMETER III BEAM PIPE".CHINESE JOURNAL OF MECHANICAL ENGINEERING 21.3(2008):1-6.
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