Track segment finding with CGEM-IT and matching to outer drift chamber tracks in the BESIII detector

Sun, X. H.; Wang, L.L.; Ling-Hui, Wu; Ju, Xu-Dong; Xiu, Qing-Lei; Dong, L. Y.; Dong, M. Y.; Li, Weidong; Li, Weiguo; Liu, Huaimin; Ouyang, Q.; Yuan, Y.; Zhang, Yao

doi:10.1088/1674-1137/40/9/096203

Cited by 1 publication

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the full MDC already has a complete pattern recognition based on Hough Transformation [82], two methods have been developed to associate the clusters to the correct track candidate. The first method, called Track Segment Finder [83], is an algorithm to find the CGEM-IT tracklets using this detector alone and then match the track segments with the ones found by the independent ODC pattern recognition. The second method, called Hough Track Finder [84], uses the whole tracking system at once, including CGEM-IT and ODC, and acts on all the hits in a global mode.…”

Section: Track Reconstructionmentioning

confidence: 99%

The CGEM-IT: An Upgrade for the BESIII Experiment

et al. 2022

View full text Add to dashboard Cite

The BESIII experiment has been collecting data since 2009 at the e+e− collider BEPCII in Beijing, a charm-τ factory characterized by high statistics and high precision. The discovery of exotic charmonium-like states and the still open questions in low-energy QCD led to an extension of the experimental program, with several upgrades. This review focuses on the CGEM-IT, the innovative solution proposed to replace the current inner tracker, which is aging. It consists of three, co-axial, cylindrical triple-GEM detectors and will be the first cylindrical GEM operating inside a 1 T magnetic field with analogue readout. For this purpose, a dedicated mixed-signal ASIC for the readout of CGEM-IT signals and FPGA-based electronics for data processing have been developed. The simultaneous measurement of both ionization charge and time distribution enables three reconstruction algorithms, to cope with the asymmetry of the electron avalanche in the magnetic field and with non-orthogonal incident tracks. The CGEM-IT will not only restore the design efficiency but also improve the secondary vertex reconstruction and the radiation tolerance. The gas mixture and gain settings were chosen to optimize the position resolution to ∼130 µm in the transverse plane and better than 350 µm along the beam direction. This paper addresses the innovative aspects in terms of construction, readout, and software, employed to achieve the design goals as well as the experimental measurements performed during the development and commissioning of the CGEM-IT.

show abstract

Section: Track Reconstructionmentioning

confidence: 99%