Hit efficiency study of the BESIII drift chamber

The Beijing Spectrometer III (BESIII) on the Beijing Electron Positron Collider II (BEPCII) is a unique facility operating in the τ-charm region. The multilayer drift chamber (MDC), which plays a crucial role in the measurements of momentum and dE/dx for charged particles generated during electron-p...

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Published inNuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 1063; p. 169276
Main Authors Lyu, Y.F., Wu, L.H., Guo, A.Q., Dong, M.Y., Wang, L.L., Yu, C.X., Zhang, H.H., Liu, H.M., Sun, S.S., Ouyang, Q., Zhang, Y., Liang, Y.T.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.06.2024
Subjects
Aging effect
BESIII
Drift chamber
Hit efficiency
Hit efficiency
Aging effect
BESIII
Drift chamber
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Summary:The Beijing Spectrometer III (BESIII) on the Beijing Electron Positron Collider II (BEPCII) is a unique facility operating in the τ-charm region. The multilayer drift chamber (MDC), which plays a crucial role in the measurements of momentum and dE/dx for charged particles generated during electron-positron collisions, has been operating for around 15 years. Hit efficiency is a fundamental performance criterion of the MDC. To analyze the spatial distribution of the hit efficiency and the stability during the operation over the past decade, a track-based analysis was performed using Bhabha events collected from 2012 to 2023. Decreasing in hit efficiency due to the aging effect was observed in the first three layers. A position-dependent behavior was studied, which may be related to beam-induced background.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2024.169276