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	The cylindrical gem inner tracker of the besiii experiment: prototype test beam results
	Lavezzi, L.1,6; Alexeev, M.6; Amoroso, A.6,11; Ferroli, R. Baldini1,3; Bertani, M.3; Bettoni, D.2; Bianchi, F.6,11; Calcaterra, A.3; Canale, N.2; Capodiferro, M.3,5
刊名	Journal of instrumentation
	2017-07-01
卷号	12页码:8
关键词	Micropattern gaseous detectors (msgc, gem, thgem, rethgem, mhsp, micropic Micromegas, ingrid, etc) Particle tracking detectors (gaseous detectors)
ISSN号	1748-0221
DOI	10.1088/1748-0221/12/07/c07038
通讯作者	Lavezzi, l.(lia.lavezzi@to.infn.it)
英文摘要	A cylindrical gem detector is under development, to serve as an upgraded inner tracker at the besiii spectrometer. it will consist of three layers of cylindrically-shaped triple gems surrounding the interaction point. the experiment is taking data at the e(+)e(-) collider bepcii in beijing (china) and the gem tracker will be installed in 2018. tests on the performances of triple gems in strong magnetic field have been run by means of the muon beam available in the h4 line of sps (cern) with both planar chambers and the first cylindrical prototype. efficiencies and resolutions have been evaluated using different gains, gas mixtures, with and without magnetic field. the obtained efficiency is 97-98% on single coordinate view, in many operational arrangements. the spatial resolution for planar gems has been evaluated with two different algorithms for the position determination: the charge centroid and the micro time projection chamber (mu-tpc) methods. the two modes are complementary and are able to cope with the asymmetry of the electron avalanche when running in magnetic field, and with non-orthogonal incident tracks. with the charge centroid, a resolution lower than 100 mu m has been reached without magnetic field and lower than 200 mu m with a magnetic field up to 1 t. the mu-tpc mode showed to be able to improve those results. in the first beam test with the cylindrical prototype, the detector had a very good stability under different voltage configurations and particle intensities. the resolution evaluation is in progress.
WOS研究方向	Instruments & Instrumentation
WOS类目	Instruments & Instrumentation
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000406420100038
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2176940
专题	高能物理研究所
通讯作者	Lavezzi, L.
作者单位	1.Chinese Acad Sci, Inst High Energy Phys, 19B YuquanLu, Beijing 100049, Peoples R China 2.Ist Nazl Fis Nucl, Sez Ferrara, Via G Saragat 1, I-44122 Ferrara, Italy 3.Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 40, I-00044 Frascati, Roma, Italy 4.Ist Nazl Fis Nucl, Sez Perugia, Via A Pascoli 14, I-06123 Perugia, Italy 5.Univ Roma La Sapienza, Ist Nazl Fis Nucl, Sez Roma, Ple A Moro 2, I-00185 Rome, Italy 6.Ist Nazl Fis Nucl, Sez Torino, Via P Giuria 1, I-10125 Turin, Italy 7.Joint Inst Nucl Res, Joliot Curie 6, Dubna 141980, Moscow Region, Russia 8.Politecn Torino, Dipartimento Elettron & Telecomunicaz, Corso Duca Abruzzi 24, I-10129 Turin, Italy 9.Univ Ferrara, Dipartimento Fis, Via G Saragat 1, I-44122 Ferrara, Italy 10.Univ Perugia, Dipartimento Fis & Geol, Via A Pascoli 14, I-06123 Perugia, Italy
推荐引用方式 GB/T 7714	Lavezzi, L.,Alexeev, M.,Amoroso, A.,et al. The cylindrical gem inner tracker of the besiii experiment: prototype test beam results[J]. Journal of instrumentation,2017,12:8.
APA	Lavezzi, L..,Alexeev, M..,Amoroso, A..,Ferroli, R. Baldini.,Bertani, M..,...&Yan, L..(2017).The cylindrical gem inner tracker of the besiii experiment: prototype test beam results.Journal of instrumentation,12,8.
MLA	Lavezzi, L.,et al."The cylindrical gem inner tracker of the besiii experiment: prototype test beam results".Journal of instrumentation 12(2017):8.

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